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Average temperatures

Jim_Hodge · 2024-08-09 21:42:48

This is probably a stupid question but I'll ask anyway. When forecasters refer to above or below average temperatures for the time of year, what is the average based on? What I mean is, is it the average over the past 10 or 20 or 30 years, or since records began. Does the average therefore change every year?

09-08-2024 9:42pm

#1

Jim_Hodge

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This is probably a stupid question but I'll ask anyway.
When forecasters refer to above or below average temperatures for the time of year, what is the average based on? What I mean is, is it the average over the past 10 or 20 or 30 years, or since records began. Does the average therefore change every year?

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#2 09-08-2024 10:01pm

mcburns07

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30 year period but it changes every 10 years. Currently comparing to 1991-2020.
https://www.met.ie/climate/30-year-averages

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