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Last Full Update: 02 Aug 2026, 07:35 BSTUpdated: 02 Aug 26 07:35
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Historical Ranked Annual Data - Rainfall / mm

TotalMax hourMax 10-minMax rateMean rateWet hoursWet % of day
Annual
TotalLowestHighestRangeCount ≥Count <
Threshold
0.21.03.05.010.020.0
Start year
18711950198020002009

Top annual highest
#
Value
Date
1
147.5
1975*
2
68.7
1977*
3
61.7
2002*
4
54.7
1998*
5
52.1
1992*
6
44.1
1956*
7
42.1
1987*
8
42.0
2021
9
40.7
2014
10
40.6
2000*
11
40.5
1980*
12
39.3
1969*
13
39.1
2017
14
39.0
1994*
15
38.7
1973*
16
38.6
1984*
17
38.3
1960*
18
37.5
1966*
19
35.8
2025
20
35.8
2022
21
35.8
2009
22
35.4
1971*
23
34.0
2020
24
33.8
1962*
25
33.6
2026
26
33.5
1978*
27
33.3
1993*
28
32.8
1965*
29
32.2
1968*
30
32.0
2019
31
32.0
2013
32
31.9
2015
33
31.7
2010
34
31.6
1970*
35
31.2
1988*
36
30.6
2001*
37
30.4
2016
38
30.4
2008*
39
30.2
1974*
40
29.8
1964*
41
29.0
1981*
42
28.7
1995*
43
28.7
1991*
44
28.3
1979*
45
27.8
1986*
46
27.4
2004*
47
27.3
2024
48
27.2
1958*
49
26.7
1951*
50
26.5
1967*
51
26.1
1982*
52
25.7
2012
53
25.2
1963*
54
25.0
2007*
55
24.5
1983*
56
24.4
1989*
57
24.2
1985*
58
24.1
1957*
59
23.8
1954*
60
23.3
1999*
61
22.9
2003*
62
22.8
1955*
63
22.6
1961*
64
22.5
1976*
65
22.5
1952*
66
21.7
2011
67
21.4
2023
68
21.1
2005*
69
21.0
1953*
70
20.6
2006*
71
20.6
1997*
72
20.3
1972*
73
20.2
1950*
74
19.6
1996*
75
19.1
2018
76
16.3
1990*
77
15.4
1959*
25
33.6
Current year
19
35.8
Last year
Bottom annual highest
#
Value
Date
1
15.4
1959*
2
16.3
1990*
3
19.1
2018
4
19.6
1996*
5
20.2
1950*
6
20.3
1972*
7
20.6
1997*
8
20.6
2006*
9
21.0
1953*
10
21.1
2005*
11
21.4
2023
12
21.7
2011
13
22.5
1952*
14
22.5
1976*
15
22.6
1961*
16
22.8
1955*
17
22.9
2003*
18
23.3
1999*
19
23.8
1954*
20
24.1
1957*
21
24.2
1985*
22
24.4
1989*
23
24.5
1983*
24
25.0
2007*
25
25.2
1963*
26
25.7
2012
27
26.1
1982*
28
26.5
1967*
29
26.7
1951*
30
27.2
1958*
31
27.3
2024
32
27.4
2004*
33
27.8
1986*
34
28.3
1979*
35
28.7
1991*
36
28.7
1995*
37
29.0
1981*
38
29.8
1964*
39
30.2
1974*
40
30.4
2008*
41
30.4
2016
42
30.6
2001*
43
31.2
1988*
44
31.6
1970*
45
31.7
2010
46
31.9
2015
47
32.0
2013
48
32.0
2019
49
32.2
1968*
50
32.8
1965*
51
33.3
1993*
52
33.5
1978*
53
33.6
2026
54
33.8
1962*
55
34.0
2020
56
35.4
1971*
57
35.8
2009
58
35.8
2022
59
35.8
2025
60
37.5
1966*
61
38.3
1960*
62
38.6
1984*
63
38.7
1973*
64
39.0
1994*
65
39.1
2017
66
39.3
1969*
67
40.5
1980*
68
40.6
2000*
69
40.7
2014
70
42.0
2021
71
42.1
1987*
72
44.1
1956*
73
52.1
1992*
74
54.7
1998*
75
61.7
2002*
76
68.7
1977*
77
147.5
1975*
53
33.6
Current year
59
35.8
Last year

Rainfall annual extremes: highest and lowest annual maxima.
There are 77 valid years for the chosen period from 1950 to present in London, NW3. Data for Rainfall begins in 1871.

*Data from before 2009 are mostly from the historical site at Whitestone Pond in Hampstead. Where data from that record is missing, other nearby sites were used, including St James Park, Heathrow, and Kew Gardens (pre-1910). Best efforts have been made to adjust for site differences, but uncertainties are somewhat greater for this data. I am grateful to the Met Office for making this data available for free through the MIDAS Open database.

Total rainfall accumulated during the day (midnight to midnight, local time). Tip counts are reset at midnight.

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