On Jan 20, 11:11*am, John Hall wrote:
These are CET daily mean temps in degrees Celsius for the 3 winter
months over the period 1772-2007 (2006 in the case of December).

* * * * Jan * * Feb * * Dec
1 * * * 3.29 * *3.92 * *5.11
2 * * * 3.30 * *3.86 * *5.02
3 * * * 3.18 * *3.99 * *5.05
4 * * * 3.38 * *3.99 * *5.08
5 * * * 3.23 * *4.07 * *5.14
6 * * * 3.36 * *4.11 * *4.80
7 * * * 3.18 * *4.23 * *4.59
8 * * * 3.21 * *3.98 * *4.36
9 * * * 3.35 * *3.93 * *4.17
10 * * *3.43 * *3.92 * *4.27
11 * * *3.28 * *3.80 * *4.18
12 * * *3.04 * *3.71 * *4.37
13 * * *3.28 * *3.63 * *4.49
14 * * *3.31 * *3.72 * *4.49
15 * * *3.19 * *3.97 * *4.39
16 * * *3.34 * *3.89 * *4.32
17 * * *3.34 * *3.74 * *4.42
18 * * *3.30 * *3.73 * *4.38
19 * * *3.44 * *3.76 * *4.06
20 * * *3.29 * *3.73 * *3.93
21 * * *3.48 * *4.14 * *3.94
22 * * *3.56 * *4.33 * *3.87
23 * * *3.50 * *4.45 * *3.82
24 * * *3.51 * *4.40 * *3.77
25 * * *3.39 * *4.48 * *3.44
26 * * *3.46 * *4.45 * *3.41
27 * * *3.62 * *4.59 * *3.41
28 * * *3.54 * *4.50 * *3.40
29 * * *3.72 * *- * * * 3.64
30 * * *3.79 * *- * * * 3.59
31 * * *3.96 * *- * * * 3.44

I didn't bother with Feb 29th, as calculating the mean would have been
too fiddly to be worthwhile.

I've already commented on January in another post. February shows a
tendency to be a bit colder between about the 11th and 20th, giving some
credence to the Buchan cold spell (which the singularity work of Brooks
and Lamb I believe also identified). The last week is notably milder.

December shows a tendency for a relative cold period from about the 8th
to 12th. It then cools down again from about the 19th. There's no sign
of a post-Christmas mild spell, though, with the 25th to 31st being the
coldest part of the month. I suspect that the mean for the last 100
years only might show very different trends.
--
John Hall

* * * * * * * * * * "The covers of this book are too far apart."
* * * * * * * * * * * * * * * * * * * Ambrose Bierce (1842-1914)

I posted my mean figures for January in the earlier 'mid Jan mild
spell' thread

Here are the figures for February ((Penzance 1992-201)
1. 9.95 5.2
2. 9.72 4.6
3. 10.03 4.7
4. 10.41 5.6
5. 10.45 5.7
6. 10.09 5.3
7. 10.55 5.4
8. 10.58 5.8
9. 10.16 5.2
10. 10.33 4.7
11. 11.33 6.4
12. 11.19 6.4
13. 10.29 5.5
14. 10.17 4.4
15. 10.57 4.1
16. 10.32 4.8
17. 10.69 4.4
18. 9.91 5.3
19. 10.08 4.8
20. 9.71 4.6
21. 10.07 3.9
22. 10.42 5.3
23. 10.50 5.7
24. 10.65 5.0
25. 10.17 4.2
26. 10.28 5.2
27. 9.80 4.6
28. 10.13 5.0

Unlike January, where there is a very distinct 'mild' spell, nothing
really clear here in the last couple of decades.

Graham
Penzance