The Mildest Christmas Day Cet Mean....

[Weather-history]

......1824 and 1983, both with 10.4

1803: 9.0

1806: 9.4

1813: 8.1

1824: 10.4

1827: 9.0

1837: 8.6

1843: 8.4

1852: 8.2

1863: 8.1

1872: 8.5

1900: 8.2

1920: 8.5

1931: 9.4

1941: 9.1

1947: 8.1

1982: 8.2

1983: 10.4

1988: 9.3

1989: 8.4

1997: 8.5

2002: 8.9

2003: 9.1

The 1813 one is very interesting as that occurred just before start of the severe winter of 1813-14, it wasn't until the 28th of March 1814 before that daily CET value was beaten.

[Weather-history]

Criteria was greater than 8.0°C

 

2011: 8.1

2016: 9.5

2017: 9.7

------------------------------

1872: 8.5

 

Bristol (°F)

Max: 50 Min: 42

Cheltenham

Max: 51  Min: 44   (rain from 9am-11.30am, showery afternoon

Dover 

Max: 50 Min: 47

Exeter

Max: 53 Min: 43.5

Ilfracombe

Max: 54.5 Min: 48.0

Liverpool

Max: 50.5 Min: 41.5

Southampton

Max: 50.1 Min: 47.7

Thwaite

Max: 51 Min: 43

 

 

 

[A Face like Thunder]

Pardon my asking, but where is 1987 in this chart? I recall we played cricket on the lawn that day in Surrey and I'm sure the mean would have been at least 8.0C that day.

[Weather-history]

1 hour ago, A Face like Thunder said:

Pardon my asking, but where is 1987 in this chart? I recall we played cricket on the lawn that day in Surrey and I'm sure the mean would have been at least 8.0C that day.

CET mean  was 7.3°C  that day and therefore didn't meet the criteria.

London Gatwick recorded a maximum of 10.7°C but the minimum was only 3°C

[LetItSnow]

6 hours ago, Weather-history said:

CET mean  was 7.3°C  that day and therefore didn't meet the criteria.

London Gatwick recorded a maximum of 10.7°C but the minimum was only 3°C

Somewhat mild air aloft but the south was under a ridge so perhas people's perception of Christmas Day 1987 being very mild is somewhat warped by the fact that I heard that it was quite sunny, and mild, sunny weather in the first half of winter is fairly rare. Explains why the nighttime temperatures, while above average, weren't particularly mild.

[Plume Meets BFTE]

2015 also, came in at bang on 8C mean.

One of the coolest days of that month!

[Weather-history]

2023: 10.7

 

[Don]

I wonder if 2024 will steal the title this year?!

[Summer8906]

 Don Perhaps too anticyclonic in the south? Seems to be a light SE feed for the closing days of the year though perhaps it will not have set in fully by Christmas Day.

It seems incredibly difficult to even get a Christmas Day with maxes in the 6-9C range, which it ought to be by default. As I've said before it wouldn't surprise me if the mean temp for Christmas Day isn't a lot lower than that for Easter Day if you discount the unseasonably warm outliers from the latter.

On another matter interesting to see 2003 in there. It must have rather suddenly got much colder as I'm sure I remember Boxing Day being cold and windy with hail showers on a NW-ly and then it got even colder as the airmass stagnated in the closing days of the year.

I also remember cold unstable air a few days before Christmas so must have been a very transient mild spell.

Edited December 19, 2024 by Summer8906

[Summer8906]

 LetItSnow Certainly looks more settled than I remember most of the end of 1987 (one long stratus and drizzlefest) but I guess it was a one-off ridge. I don't clearly remember the Christmas Day (was near Manchester that year) but I think it was mild and cloudy, but dry. The years 1983-91 followed a curious alternating pattern: odd years mild, cloudy and dry, even years mild and wet though 1988 was merely drizzly; if I remember right 1992 was the first even remotely seasonal Christmas Day since 1981.

Edited December 19, 2024 by Summer8906