How often is your 24-hour high set during the night? (climate, warm)

[lommaren]

It's actually quite common around the winter solstice here because the sun gives such poor heat output with the 8 degree peak angle and the temps being so ultra-dependent on the Gulf Stream's whims.

For example, it can be around 0C during the day with a continental system in charge. Then the westerlies come in after sunset and by midnight it's suddenly 4-5C...

This phenomenon is stricly linked to November, December and January though. It's an extreme occurence if happening in any other month.

Does this happen in your climates as well? I'm especially curious since the vast majority of members live far nearer the equator than I do and therefore have much stronger winter sun strength

[ben86]

Happens up to half the time in winter, especially under Atlantic-dominated spells. In 2015 we broke our high temperature records for January and December and both records were set when the sun was below the horizon.

We also broke our record for November that year, but that was a summer-style setup with sunshine all day and the high recorded in the afternoon, while usually our highest temperatures for November are recorded under overcast/windy conditions at whatever time of day or night the milder air happens to be blown over us, so to get 18.2C on a sunny November 1st - two degrees higher than any other November temperature we've ever recorded - was very surreal.

I think we missed out on what would have been our only ice day of last winter as well because it got to 0.2C at 1 am or something

Much less common in summer, but it can happen with strong cold fronts or prolonged heavy rain: June 22 this year had a high of 21.2C at 1 am and the afternoon never got above 16.9C (cold front), and June 28 had a high of 10.3C at 6 am and the rest of the day never got above 10.1C (persistent rain).

[muslim12]

Happens in winter mostly but some years as late as March and April. They happen normally from backdoor fronts.

[Baba_Wethu]

It happened in May and June this year. Obviously in winter it happens all the time. If the previous day was warm and the next day overcast it can happen in summer.

[Rozenn]

It happens a lot in Paris during the cold season, but in Nice I don't even remember an occurence.

Originally Posted by Baba_Wethu

If the previous day was warm and the next day overcast it can happen in summer.

This also happens in Paris, though it's fairly rare.

[jgtheone]

During summer, if a cold front comes through during the morning.

[nei]

Mostly happens when a strong cold or warm front passes through in winter; don't think it happens without them

[ben86]

Does anybody else get days in winter when the air mass is so cold the temperature doesn't really warm up at all even without any freezing fog? I see those -23/-25 days forecast a lot for places like Winnipeg, but this is the most impressive one I know of considering this is Germany and not Canada or Russia:

Fachhochschule Jena - Klimatologische Messstation

[nei]

If the air mass is very cold here, normally it'll still warm up during the day. Just the day and night will be colder.

[nei]

Originally Posted by ben86

Does anybody else get days in winter when the air mass is so cold the temperature doesn't really warm up at all even without any freezing fog? I see those -23/-25 days forecast a lot for places like Winnipeg, but this is the most impressive one I know of considering this is Germany and not Canada or Russia:

Fachhochschule Jena - Klimatologische Messstation

Is that station at high elevation? Even our coldest month I can remember we never got a daily max of -13°C, but a daily min of -27°C or so.

https://www.wunderground.com/history...eqdb.wmo=99999