I've always wondered a bit about this, and this could well be partly down to living in Glasthule which is literally right on the eastern seafront (beside Dun Laoghaire), so when it's windy here it tends to be cold wind regardless of other factors.
Essentially what I'm wondering is, how does one balance the air temperature and expected wind speed when determining whether a day is going to feel warm or cool? I know there are other factors which play in to the "absolute temperature" vs "feels like" temperature, but this one seems to be the biggest one if you live in a coastal area. And how does sunshine or cloud cover impact this?
To take one example: This coming weekend's Dun Laoghaire forecast suggests that Saturday afternoon (4PM) will have a temperature of 8ºC with a wind speed of 8 km / h, under a partly sunny sky. Sunday afternoon, however (also 4pm) will have a temperature of 10ºC with a wind speed of 20 km/h, again under a partly sunny sky.
Going by temperature alone, Sunday will be the warmer of the two days. However, the difference in wind speed is substantial, and at least to my mind, suggests that Saturday will feel warmer - even though it's two degrees lower in air temperature, the amount of wind expected on Sunday would in my experience make the day feel a lot less warm, particularly if walking on the seafront or sitting in the park beside the sea. That, however, is pure instinct and could turn out to be entirely incorrect.
Furthermore, sometimes (especially at this time of year and earlier in the Spring / late Winter) you can have cold high pressure systems in which a cloudless day with slack winds and plenty of sunshine will oddly feel cooler than a day with a lot of cloud around and low pressure. If you have two days, both forecasting a temperature of 10 degrees, but one with clear skies and another with a lot of cloud cover, which day will actually be warmer out in terms of which clothes you would wear, etc?
What's the generally accepted way to balance these factors in deciding, for instance, which day would be nicer to go for a walk or have a picnic?
In the era of outdoor, socially distant coffee dates and catchups, these are the important questions dammit