This site is run by the Hampstead Scientific Society and has a continuous record dating back to 1909. The data have been obtained from http://www.weather-uk.com/index.html.
January
6
-12
February
63
24
13
7
March
10
3
21
-10
51
25
15
April
12
4
-6
56
74
1
May
16
8
27
-1
59
40
0
June
20
34
2
86
July
22
33
47
11
August
37
62
171
September
18
29
66
48
October
14
26
69
49
0.2
November
17
-4
64
December
-8
Year
729
159
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