If December 2006 is anything to go by:

Date Mn Mx
20 -2.2 4.5
21 -3.2 3.2
22 -0.9 2.9
23 -0.4 3.5
24 3.0 4.5
25 4.5 5.7
26 3.4 5.0
27 3.0 9.7
28 7.2 10.5
29 7.2 12.5
30 7.2 12.5
31 7.7 11.9

The 'cold' spell from the 20th - 26th was the coldest of the entire winter.
The temperatures from the 29th onwards were more typical of the rest of the
winter. So who knows!

The outlaws are arriving from Portugal for Xmas. They always expect to see a
bit of snow but every year the weather fails and all they get is weather
very similar to what they are used to in Lisbon at Xmas: mild, wet, very wet
or torrential.
________________
Nick G
Otter Valley, Devon
83 m amsl
http://www.ottervalley.co.uk