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I think that low is the UK record, although I'm not sure. Lows above 20C are pretty rare in this country.
Even the Scandinavian countries seem to get warmer nights during summer warm spells. That could be the shorter darkness there though.
The record highest low is actually 23.9C in Brighton on 3 August 1990. I think LWC was a rooftop site, which means it would give higher lows than somewhere with a standard exposure.
Some of the warm nights some of the far northern coastal places in Scandinavia can get look unreal: a low of 24.2C at Makkaur lighthouse in northern Norway at 71N! I'm impressed somewhere like that even gets highs that warm.
In the Midwest near 90% of the homes here have AC. I would bet the average for Illinois alone is over 90%. Nationwide the average is 87% (2009 study). But for those who don't a night like that, ceiling fans won't cut it.
Interesting that the majority of A/C in the Northeast is room A/Cs but nowhere else is. Assumed central A/C would be the minority everywhere except the south. For Massachusetts, 22% of homes have no A/C. 20% of homes have central A/C, the rest are window units, which are often just for a bedroom.
Some of the warm nights some of the far northern coastal places in Scandinavia can get look unreal: a low of 24.2C at Makkaur lighthouse in northern Norway at 71N! I'm impressed somewhere like that even gets highs that warm.
Probably little cooling at night from the short nights. But that must be strange to experience. What was the dew point? If the dew point is much lower, than my explanation is right. (Just didn't have a chance for radiative cooling).
The record highest low is actually 23.9C in Brighton on 3 August 1990. I think LWC was a rooftop site, which means it would give higher lows than somewhere with a standard exposure.
Some of the warm nights some of the far northern coastal places in Scandinavia can get look unreal: a low of 24.2C at Makkaur lighthouse in northern Norway at 71N! I'm impressed somewhere like that even gets highs that warm.
that's fascinating. sure, there's midnight sun there. but still, norway is basically tundra north of 70N and the mean temp in july hovers around 10C. 24C for a daily low shouldn't be possible.
Probably little cooling at night from the short nights. But that must be strange to experience. What was the dew point? If the dew point is much lower, than my explanation is right. (Just didn't have a chance for radiative cooling).
I don't know, I just got it from what Jakobsli said here:
The short nights / lack of night must help, but there's more to it than that if somewhere near Trondheim can get a 25C low at the end of August. Having shorter nights doesn't do the northern parts of Britain any good when comparing summer lows with the south of the country. I imagine all these places up there that get these kind of lows are in very secluded and shallow bays with relatively high water temperatures and also benefit from foehn effects.
I think that low is the UK record, although I'm not sure. Lows above 20C are pretty rare in this country.
Even the Scandinavian countries seem to get warmer nights during summer warm spells. That could be the shorter darkness there though.
Daylength can't be the only reason, because most of the high lows are in the south, even on days when it's as warm in the north where days are even longer. The Baltic and the thousands of lakes is probably the reason.
The southernmost tip of continental Finland hasn't gone below 20 in 5 days: Synop report summary
As for lows above 20C - never happened here as far as I'm concerned. When the skies are clear, the temperature always falls quickly. Our warmest nights occur when there is more cloud.
The short nights / lack of night must help, but there's more to it than that if somewhere near Trondheim can get a 25C low at the end of August. Having shorter nights doesn't do the northern parts of Britain any good when comparing summer lows with the south of the country. I imagine all these places up there that get these kind of lows are in very secluded and shallow bays with relatively high water temperatures and also benefit from foehn effects.
According to norwegian meteorologists, there are two main causes for warm nights ("tropical night") in Norway.
The first is warm sea temperatures, which happens in the south of the country, usually in late July and August. Therefore, the locations with the most tropical nights are lighhouses along the southern coast. This lighthouse now has 6 "tropical nights" in a row: Synop report summary
But there can also be warm nights in the northern part of the country, even if the open sea never reaches 20C. Here the cause is warm air coming from the E /SE all night, and helped with local foehn -effects (very varied terrain in much of Norway) and short nights /non-existent nights, so the sun is relatively high very early in the morning. There will not be "tropical nights" in Northern Norway if the air is still / without warm breeze. Skrova Fyr (lighthouse) in Lofoten (200 km N of Arctic Circle) now has three "tropical nights" (minimum above 20C) this July: Synop report summary
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I'm impressed somewhere like that even gets highs that warm.
