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Irish Weather Statistics
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05-03-2017 2:58pm#1I've gathered Ireland's % of LTA rainfall for every month since March 2011 here in this graph below. Yes, they're not Grange's :P, they're Ireland's.
Since March 2011, there has been three months with 200% or more of the average rainfall, June 2012, February 2014 and December 2015.
There has been four months with 50% or less of the average rainfall, March 2011, March 2012, September 2014 and October 2016.
Photography site - https://sryanbruenphoto.com/
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21st March 2013 was very wet in places. Cork AP had 42.0mm but there were plenty places wetter.
The stats are great but I found it misleading. No denying it was very wet on the 3rd in some areas, wettest midnight to midnight March day at Shannon since 1962
I see your confusion no worries. I forgot about 21st March 2013
. Probably because it was the worst day of my life and I don't want to remember it. I dread March 21st every year. But you're right anyway. Photography site - https://sryanbruenphoto.com/
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These are great Stats syran.
Have you any for Summers of 2007 - 2012.
In Sligo I remember these being incredibly bad cold wet and dull.
I wonder was it the same countrywide.
Interestingly I am sure that 2016/17 Winter the Northwest was one of the driest places in Ireland. March will be our first > 100mm month for rainfall in 5 or 6.
That temperature anomally charts great. I was going to do one with the rainfalls but Im not as dedicated as yourself.
Thank you
. If I have time tomorrow, I will put up stats on those Summers, it won't be a problem at all for me to do them for you. Photography site - https://sryanbruenphoto.com/
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How about months with above average temperatures. I thinking about July 2013 when the mean temperature at Shannon Airport alone was over 18c. Or that balmy September 14 and December 15 to mention.
Ok I'll do them also, since you're so intrigued. Photography site - https://sryanbruenphoto.com/
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Switch to excel right nowsryanbruen wrote: »I understand the bias 100% which is why I find making these stats a bit of a headache. No I don't use Excel, I use a calculator. I'm making it more tedious for myself haha, I should start using Excel when doing this. You could also use OpenOffice if you don't have excel. It will make things much easier for these sort of calculations, and you can do lot's of tests like removing certain stations with just a click. 0 -
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A year that seems to never be talked about is 2004 but 2004 like any other year did have some interesting moments and records.
2004 started off in January but January was nothing to ride home about as it was just a rather sunny, mixed January with rather mild and wet conditions in places.
February, after a wet start during the first few days, was a very settled month with plenty of sunshine. It was the "February 2008" for Ireland. If you did not get the reference there, February 2008 recorded sunshine totals of over 120 hours, even 130-140 hours in England & Wales and was easily their sunniest February on record. February 2004 was easily Ireland's sunniest February on record. February recorded an average sunshine total of 108 (3.7 hours per day on average) hours which was 165% of Ireland's average February sunshine. After an exceptionally mild start with temperatures reaching 16.7c at Ardee on the 3rd, it became much colder with severe frost being a common occurrence. February 2004 was a very good Winter month but unfortunately, it's largely forgotten.
March started off very cold, continuing on from the severe frost in February. Dublin Airport recorded a grass minimum temperature of -12.6c on the 2nd. Despite the severe frosts at the beginning, however, it was a rather mild month. It was a rather wet month but not remarkably so. Like February, it was another exceptionally sunny month though not as sunny as March 2003 in many places. Belmullet nevertheless recorded its sunniest March on record with a total of 163 hours of sunshine which is 160% of its average March sunshine.
April was very forgettable with no extremes whatsoever recorded during the month. For example, there was an absence of very high maximums and very low minimum temperatures. It was a rather dull, mild and mixed rainfall April. March 2004 recorded totals normally expected to be recorded in an April so April 2004 was duller than March in many places including Belmullet.
May had a notable dry spell during the middle of the month with little to no rainfall and some pleasantly warm temperatures along with blue skies at times. Other than that, May was nothing exciting to mention with rather sunny, warm and dry conditions.
June was a weird month as it was dull in the north but sunny in the south. I think the 14th (see picture below) perfectly captures the north-south split in terms of sunshine.
Malin Head recorded no sunshine at all on the 14th but Cork Airport recorded a stunning day with 16 hours of sunshine, a full day of blue skies.
On the 22nd/23rd June, a storm brought very heavy rain and strong winds to much of western Europe, including Ireland. Winds gusted to 65mph in Germany and 2 people were killed because of it. Many others were badly injured. A tornado struck the village of Micheln, Germany tearing roofs from several houses and injuring at least 6 people. John F Kennedy Park, Co. Wexford recorded a daily fall of 57.0mm during this period, its wettest June day on record, at least until 2012. Valentia Observatory recorded 30.8mm on the 22nd and Cork Airport recorded 44.0mm on the same day.
Dublin Airport had a mean of 12 knots during June which meant that June 2004 was its windiest June on record. Despite the storm and the heavy rain on the 26th, June 2004 was a very warm month and sunny in most places.
June was not alone in the storms of Summer 2004 as July 2004 brought another storm but more towards the English Channel and France than Ireland. This storm brought thundery rain and very strong winds. More than 100,000 homes were affected by blackouts as gales cut power supplies over a wide area of southwest England and south Wales, while some record-breaking daily rainfalls were measured on both sides of the Channel. Wittering, near Peterborough, recorded 108mm in the 24-hour period up to 1700UTC on the 8th, while in Brittany, 72mm fell in Brest on the 7th, greatly
exceeding the previous record for a daily fall in July there of 46mm. Off the Brittany coast, 88mm was measured on the same day on l'île d'Ouessant, where winds gusted to 64 knots (74mph); gusts of over 60mph were also recorded in coastal areas of southern England and Wales. As the depression drifted slowly eastwards and filled on the 9th, an unstable northwesterly airstream followed, producing heavy and sometimes violent thunderstorms; hail damage to vineyards was reported from areas of western France. Most of Ireland was unaffected by the storm, although Rosslare measured the highest gust of the month early on the 8th, 45 knots (52mph).
Other than that, July 2004 was nothing interesting as it was fairly cool, wet and sunny.
August 2004 was a very showery and thundery month but very warm and muggy at the same time, literally the dream combination for many weather enthusiasts. It was not like that all the time, however. For example, here's some beach goers enjoying themselves at Portmarnock, Co. Dublin on the 2nd.
Dublin Airport recorded 4 days during August with daily falls of 15mm or more and each of these was associated with a thunderstorm. Thunderstorms were recorded across Ireland on 14 days of the month.
On the 16th, severe flooding devastated the village of Boscastle in Cornwall, England following exceptionally heavy rain- due in part to the remnants of tropical storm Bonnie. Nearby Otterham measured 200.4mm of rain in a 24-hour period, while Lesnewth recorded 64.8mm in an hour. This flooding was almost on the anniversary of similar destruction of the Devon village of Lynmouth in August 1952. Meanwhile on the 18th, landslides trapped 57 motorists on a road in the Scottish Highlands, following days of heavy rain in the area.
Dublin Airport recorded 32.8mm on the 18th associated with thunderstorms, the most severe thunderstorms since July 1985.
All in all, August was a month of many weather events whether be it hot days, strong winds, thunderstorms, blue skies, floods etc.
September was another very warm, muggy, wet and rather sunny month again. Before 2011, this was the last September with some very warm temperatures for September (25c or more). Waterford recorded 25.6c on the 6th, the warmest September day since 1991. A few days before hand, this "red sky" took place at dawn on the 3rd. The picture was taken at Leixlip, Co. Kildare and people said it was a sign for some good weather and it sure was. The second week of September brought very warm and sunny days.
October 2004 was a very cool, wet and sunny October. Up until the last few days, October was a very forgettable month with plenty of rain and sunshine and the odd dry spell mid-month.
An exceptionally deep depression of central pressure 953hPa moved close to the south coast on the 27th, becoming almost stationary while filling slowly over subsequent days. A tidal surge, in combination with very high tides and southeasterly gales, led to considerable coastal flooding along southern and southeastern coasts. Cork was particularly badly affected and many properties close to the city centre were inundated; river levels on the Lee near Cork reached their highest values since 1962. Significant coastal erosion was caused, particularly in Counties Waterford, Wexford and Wicklow. During the morning of the 27th, a tornado lifted a helicopter ten feet off the deck of the Kinsale Bravo gas platform (bottom right). Bands of frontal rainfall
associated with the depression produced over 50mm across much of Munster and south Leinster in the period 27th/28th, with over 100mm recorded in places, leading to significant flooding along the rivers Suir and Blackwater in particular.
Here's a picture of Cork City flooded on the night of the 27th:
October 2004 was Casement Aerodrome's second wettest October on record at the time with only 2002 wetter. Casement Aerodrome also recorded 44.0mm on the 20th, its wettest October day on record at that time, obviously it was smashed in 2011 by October 24th's record breaking flood. Mullingar's grass minimum temperature of -7.6°C on the 20th (right before the heavy rain pushed in) was the lowest such value for October at the station since records began there in 1950. The 19th into the 20th was one of the coldest October nights ever recorded in Ireland. Despite being so wet, it was funnily enough Mullingar's sunniest October on record.
November 2004 was an abnormally calm, settled and mild month. It was a complete turn around from October's cold, wet and sunny conditions. As a result with very dry but mild conditions, it was often dull. In fact, it was the dullest November on record in Ireland. At no station did pressure fall below 1000hPa at all during November. Mean pressure values for November were 10-12hPa above average:
November recorded only 61% of Ireland's average November rainfall. Maximum temperatures did not fall below 10c all month at Valentia Observatory bar the 19th. November recorded only 72% of Ireland's average November sunshine (using the 1971-2000 average) or 68% (using the 1981-2010 average). Snowfall was recorded from the 18th-20th at many stations. It's amazing how mild November 2004 was in Ireland but how cold it was in the UK.
December 2004 was a very typical mild, westerly dominated month but it was rather dry and sunny. There was one outstanding event of this month, however and it's the only event I think many people here remember for 2004 (if they do remember 2004 :rolleyes:) and that was the White Christmas of 2004. In the last 50 years, the Christmas of 2004 was the whitest Christmas with many stations in the UK and Ireland having a White Christmas. Here's a typical scene at the Wicklow Mountains on Christmas Day 2004:
Photography site - https://sryanbruenphoto.com/
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Here is how the 'IMT' running 4 week temp deviation looks (from 1981-2010 base) since November. Amazing how consistently warm it has been since mid-December. For comparison I included data from the previous year.
I am wondering, with another moderate 'El Nino' forecast for later this year, will we see this warmer than average trend continue as it pours even more warmth in to the global atmosphere?
I dread to think what impact this forecast El Nino will have on the already fragile state of the Arctic as we head into next Autumn/Winter.
Data above is C/O Met Éireann.New Moon
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sryanbruen wrote: »The last time Ireland had consistently warmer than normal months of at least 6 was back in 2013/14 which had every month warmer than normal from December 2013 to July 2014. Remember how consistently warm it was from April 2006-June 2007 in Ireland (14 consecutive warmer than normal months!)? I will have the mean temperatures for Ireland in future 'cause unfortunately, I don't have them right now to compare and see how exceptionally warm this consistently warm this period of warm months was. I do know that June, July and September 2006 along with April 2007 were very warm indeed with anomalies of more than +2.0c above the average widely across Ireland.
This is only based on monthly temp anomalies in the North, but I generated this chart which shows the number of below average months in each 10 year period between January 1910 and February 2017 in respect of the 1961-90 climate period.
Data C/O The UK Met Office.
Feck it, why not got the whole hog. Chart showing No. of months per decade with above average temps:
PS. Please ignore the textual mistakes in first chart :rolleyes:New Moon
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New 1981-2010 monthly temperature means with Northern Ireland stations included this time. I will be posting a surprise soon here
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January: 5.5
February: 5.3
March: 7.1
April: 8.5
May: 11.3
June: 13.6
July: 15.4
August: 15.4
September: 13.0
October: 10.1
November: 7.2
December: 5.6Photography site - https://sryanbruenphoto.com/
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I've been secretly working on a 2010 synopsis 'cause I know how much you all loved the 2004 synopsis. I thought why not do a synopsis on one of the most interesting years. The interesting year being 2010. If you would like me to do a particular year's synopsis on the weather of Ireland, then please VM me (visitor message), do not PM me please.
I've wrote many, many, many posts stating that 2010 is my favourite year and many of my favourite months were 2010 months but I never described why. In this synopsis, I am going to be describing why and of course, a good bunch of statistics along the way 'cause that's what this thread is primarily about after all. Anyway, with all that being said, here we go onto the 2010 synopsis part one 'cause it's going to be one hell of a ride.
After how wet Summer 2009 and November 2009 were along with how cold the second half of December 2009 was, I thought the period of extreme weather came to an end but 2010 proved me 100% wrong 'cause January was the coldest since 1987 across the island of Ireland with an IMT (Irish mean temperature, measured by adding up all Irish weather stations' mean temperatures divided by the number of stations) of 2.0c which is an anomaly of -3.5c below the average. Up to that point, Ireland had not seen such a large negative temperature anomaly from average for a Winter month since February 1986.
The first ten days of January 2010 continued the cold spell that began on the 16 December 2009. This was the most extreme cold spell over Ireland since early 1963 up to this point. During these first ten days of January, mean temperatures for Ireland were like 6-8c below average so you can see how extreme the cold was. Mullingar recorded the lowest mean temperature of only 1.4c which is -2.6c below the 1961-90 average for the station. This value is -3.2c below the 1981-2010 average for the station. Valentia Observatory recorded the highest mean temperature of only 4.7c which is -2.1c below the 1961-90 average for the station. This value is -2.6c below the 1981-2010 average for the station. Casement Aerodrome recorded a minimum temperature of -12.4c on the 8th in which it equaled its all-time record low for January on the 1st in 1979. Warrenstown, Co. Meath recorded a grass minimum temperature of -14.4c on the 9th which was the lowest such value for the station since January 1982. Meanwhile, in Northern Ireland, -12.7c was recorded at Castlederg, Co. Tyrone on the 9th, Northern Ireland's lowest minimum temperature since March 2001 and for January since 1987. The night 7th/8th January was the coldest night in most places and here is the ice and snow extent in the UK & Ireland. Dublin Airport had a maximum temperature of -3.1c on the 7th which was the lowest daytime temperature Ireland had seen since January 1987. There were other very low daytime temperatures during January such as -2.2c at Phoenix Park on the very next day, the 8th.
New Years Day had a few snow showers across the country, much the same with the 2nd. The 3rd and 4th were very sunny but freezing cold days so therefore, the snow that fell at the end of December 2009, New Years Day and January 2nd stuck to the ground with ice being a major problem. On the 5th, a band of snow pushed southwards from the North. This mainly affected England & Wales but even Ireland itself got a good bunch of snow from this front. It snowed somewhere in Ireland every day from the 1st-14th with snow depth at Knock Airport reaching 20cm by the 13th. This low pressure around the 5th got stuck across the UK and Ireland for a couple of days including the 6th, 7th, 8th and 9th bringing further wintry showers to many places though mostly affecting eastern England with any major snowfalls. The 11th brought an area of rain across the country pushing into the UK giving off to a dry and rather sunny day though it was cloudy in the east. It was again pretty cold. On the 12th, a very intense band of rain pushed into the south of Ireland giving away to some spot flooding in many parts. Across northern and eastern parts, blizzards took place but as the band of rain pushed northwards, the blizzards turned to heavy rain and in turn led to severe spot flooding in those places also. Valentia Observatory recorded a daily rainfall of 58.5mm on this day, the 12th which was the station's wettest January day on record.
Temperatures remained below normal for much of January 2010 but there was a thaw mid-month with rather above average values. From the 23rd-25th, another cold spell took place and again from the 29th-31st. As a result, there was a total of 22-27 ground frosts during January 2010 which was well above average of 14-18 ground frosts. Dublin Airport recorded a maximum of 10c or more on only one day during January, the 15th which was its lowest number of days for January with such a maximum since 1963 which recorded none. The maximum temperature for January was only 12.6c at Delphi Lodge, Co. Mayo on the same day, the 15th.
Here is ice and snow covering the top of Croagh Patrick, Co. Mayo on New Years Day 2010.
Despite the wet weather during the middle of January and especially on the 12th, most places had their driest January since 2006. Shannon Airport had a total of only 30.8mm which was 31% of its January LTA (using the 1961-1990 average) so probably like 28 or 29% of its January LTA now. This was easily Shannon Airport's second driest January on record with only 1963 drier, even drier than the record breaking dry January of 1997. It was the calmest January since 1997 in terms of wind speeds.
Like with every month except July in 2010, January was very sunny. January 2010 was a record breaking sunny month across Ireland and was easily the sunniest January on record. Cork Airport recorded a sunshine total of 118 hours which was 225% of its LTA, a new record for Ireland. Valentia Observatory recorded a total of 104 hours of sunshine which was 237% of its LTA and was easily the sunniest January on record here too. These sunshine totals would be what you'd expect in a normal March, not January. And to add to that, Cork Airport had on average 3.82 hours of sunshine per day during January 2010 which was also a new record for Ireland. You thought January 2015 was very sunny in Dublin with around 90 hours of sunshine, well January 2010 was even sunnier!
Here are some more pictures of this beauty of a month across the Emerald Isle itself:
Now onto February since I think I've done enough of January now. February 2010 was another very cold month continuing the long cold, blocked spell that began in mid December 2009. It was the coldest February across Ireland since 1986. But February did not start off that way. After the rather cold end to January, as soon as February began on the 1st, a thaw began to take place as winds turned to a southerly along with rain pushing up from the south for the 1st, 2nd, 3rd and 4th. Daily rainfalls got heavier each day with a fall of 27.2mm at John F Kennedy Park, Co. Wexford on the 4th, its wettest February day since 1990. After a band of rain pushed through again on the 5th, it began to quieten down with a ridge building in the Atlantic and the winds becoming more of an easterly. The second week of February was very sunny with wintry showers hitting eastern regions at times but pretty uneventful and cold all the while as the UK was getting the general snowfall. Rain pushed into the north on Valentine's Day which pushed southwards on the 15th bringing the winds more to a northerly or northeasterly direction. The third week of February then was quite similar to the second week of February but the showers were more widespread rather than just eastern regions. Some of the showers were heavy with Belmullet, Co. Mayo recording up to 15mm on the 16th. The showers became few and far inbetween by the 21st and 22nd when it became very cold. Dublin Airport recorded a maximum of only 0.4c on the 21st and some places did not reach higher than -1c on this day. On the night of the 21st into the 22nd and also the 22nd into the 23rd, Dublin Airport recorded -6.6c which was its lowest February minimum temperature since 1991, it was beaten in February 2015 though. Straide, Co. Mayo recorded Ireland's February minimum temperature of -8.1c on the 11th, its lowest such value for February since 1986. On the 23rd, rain pushed into the south which gradually turned into heavy snow as it pushed northwards. The rainfall was up to 20mm at Johnstown Castle and snowfall was up to 10cm in parts. The 25th was a rather blustery day with snow clearing the country from the 23rd and 24th leaving showers in the northwest but mostly dry conditions. However, the 26th became a little milder and persistent rain pushed into the north with showers further southward. Malin Head, Co. Donegal recorded 28.2mm on this day, its wettest February day since 1994. The month ended with dry and sunny conditions then as we escaped Storm Xynthia which affected England & Wales. February overall recorded between 24 and 27 ground frosts, so even more than January and places that recorded 27 ground frosts had only one day throughout February without a ground frost. Compare this with the average for February of 10 to 15 ground frosts. It was one of the calmest Februarys on record in terms of wind speeds and many inland stations did not record a single gale gust throughout February.
While some parts of the east recorded February as a dull month, it certainly was not for Ireland as a whole or even just the south and west. Normally, you'd expect it to be the other way round with persistent easterlies during much of February, cloud came in off the Irish Sea which allowed the West to be sunnier than the east. Sherkin Island, Co. Cork recorded a total of 126 hours of sunshine during February 2010 which would be a new record for February sunshine in Ireland. This was the second consecutive record breaking sunny month in 2010.
Winter 2009/10 ended on a very cold, dry and record-breakingly sunny note. It was the coldest Winter since 1962/63 everywhere meaning that there was no Winter between 1963/64 and 2008/09 (inclusive) that was colder than 2009/10. Between 70 and 80 ground frosts were recorded during the season at inland stations. Valentia Observatory recorded a total of 62 ground frosts which was nearly three times its average total of 22 ground frosts. With the exception of Shannon Airport which had its driest Winter since 1963/64, it wasn't an exceptional dry Winter by any means. A recent Winter, 2005/06 had been drier than 2009/10 everywhere except Shannon Airport. Gurteen recorded only 121.7mm during the Winter which was only 48% of its LTA. So you can see that even though Winter 2009/10 may seem exceptionally dry here, there has been plenty of Winters drier than it unfortunately such as 2005/06, 1991/92 and 1963/64. Cork Airport recorded a phenomenal sunshine total of 311 hours during Winter 2009/10. In a typical Winter, it should expect around 140-160 hours of sunshine, so it certainly was an amazing total and it was easily Ireland's sunniest Winter on record. However, the east would go on for Winter 2010/11 to be sunnier than it was in 2009/10 though still not reaching this phenomenal total. Even Valentia Observatory recorded its sunniest Winter on record in 2009/10 with 289 hours and its records go back to 1860, so you can clearly see how phenomenally sunny it was. In contrast to these record breaking sunshine totals, Casement Aerodrome recorded only 175 hours of sunshine which would be a very average total for Winter there. Mean wind speeds for Winter 2009/10 were between only 5 and 11 knots and it was easily the calmest Winter on record for most stations.
All data and pictures in this post are sourced from Met Éireann for the Republic of Ireland and Met Office for Northern Ireland. Other photos would be from sites like the culturetrip.com, the Journal or the VCDNPhotography site - https://sryanbruenphoto.com/
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IMT 4 week running temp anomaly(base: 1981-2010) since January 1st up to yesterday:
Warmer than average throughout. It also has been the most humid opening 3 months of the year since 2014. which no doubt is due in part to the rapidly warming north Atlantic over the last couple of months.
All data C/O Met Éireann.New Moon
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