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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
60.8
1906*
5
56.4
1923*
6
56.3
1890*
7
54.7
1998*
8
52.1
1992*
9
46.4
1924*
10
44.5
1921*
11
44.2
1892*
12
44.1
1956*
13
44.1
1903*
14
43.9
1879*
15
42.1
1987*
16
42.0
2021
17
40.7
2014
18
40.7
1925*
19
40.6
2000*
20
40.5
1980*
21
39.4
1908*
22
39.3
1969*
23
39.1
2017
24
39.0
1994*
25
39.0
1918*
26
38.7
1973*
27
38.6
1984*
28
38.6
1926*
29
38.3
1960*
30
38.3
1917*
31
38.2
1876*
32
37.5
1966*
33
37.2
1889*
34
36.9
1919*
35
36.0
1927*
36
35.8
2025
37
35.8
2022
38
35.8
2009
39
35.8
1939*
40
35.5
1880*
41
35.4
1971*
42
35.3
1894*
43
34.9
1941*
44
34.6
1895*
45
34.5
1878*
46
34.4
1929*
47
34.4
1915*
48
34.3
1937*
49
34.2
1945*
50
34.1
1902*
51
34.0
2020
52
33.8
1962*
53
33.8
1885*
54
33.6
2026
55
33.5
1978*
56
33.3
1993*
57
33.3
1899*
58
32.8
1965*
59
32.2
1968*
60
32.0
2019
61
32.0
2013
62
32.0
1946*
63
31.9
2015
64
31.7
2010
65
31.6
1970*
66
31.3
1886*
67
31.2
1988*
68
30.6
2001*
69
30.6
1881*
70
30.4
2016
71
30.4
2008*
72
30.2
1974*
73
30.0
1914*
74
29.8
1964*
75
29.7
1893*
76
29.0
1981*
77
28.7
1995*
78
28.7
1991*
79
28.7
1916*
80
28.4
1891*
81
28.3
1979*
82
27.9
1887*
83
27.8
1986*
84
27.4
2004*
85
27.4
1898*
86
27.3
2024
87
27.2
1958*
88
26.9
1905*
89
26.7
1951*
90
26.5
1967*
91
26.5
1911*
92
26.1
1982*
93
25.9
1875*
94
25.7
2012
95
25.6
1873*
96
25.5
1931*
97
25.2
1963*
98
25.1
1907*
99
25.1
1877*
100
25.0
2007*
101
25.0
1920*
102
24.6
1942*
103
24.5
1983*
104
24.4
1989*
105
24.2
1985*
106
24.1
1957*
107
24.1
1932*
108
24.0
1871*
109
23.8
1954*
110
23.4
1909*
111
23.3
1999*
112
23.2
1904*
113
23.1
1912*
114
22.9
2003*
115
22.9
1940*
116
22.8
1955*
117
22.7
1949*
118
22.6
1961*
119
22.6
1936*
120
22.5
1976*
121
22.5
1952*
122
22.5
1938*
123
22.3
1901*
124
21.8
1884*
125
21.7
2011
126
21.7
1888*
127
21.6
1948*
128
21.5
1928*
129
21.4
2023
130
21.4
1896*
131
21.2
1944*
132
21.1
2005*
133
21.0
1953*
134
21.0
1947*
135
20.8
1882*
136
20.6
2006*
137
20.6
1997*
138
20.3
1972*
139
20.3
1874*
140
20.2
1950*
141
20.2
1934*
142
20.1
1897*
143
19.9
1922*
144
19.6
1996*
145
19.5
1943*
146
19.3
1935*
147
19.1
2018
148
19.1
1883*
149
18.6
1930*
150
17.8
1913*
151
17.3
1872*
152
16.4
1933*
153
16.4
1910*
154
16.3
1990*
155
15.4
1959*
156
14.3
1900*
54
33.6
Current year
36
35.8
Last year
Bottom annual highest
#
Value
Date
1
14.3
1900*
2
15.4
1959*
3
16.3
1990*
4
16.4
1910*
5
16.4
1933*
6
17.3
1872*
7
17.8
1913*
8
18.6
1930*
9
19.1
1883*
10
19.1
2018
11
19.3
1935*
12
19.5
1943*
13
19.6
1996*
14
19.9
1922*
15
20.1
1897*
16
20.2
1934*
17
20.2
1950*
18
20.3
1874*
19
20.3
1972*
20
20.6
1997*
21
20.6
2006*
22
20.8
1882*
23
21.0
1947*
24
21.0
1953*
25
21.1
2005*
26
21.2
1944*
27
21.4
1896*
28
21.4
2023
29
21.5
1928*
30
21.6
1948*
31
21.7
1888*
32
21.7
2011
33
21.8
1884*
34
22.3
1901*
35
22.5
1938*
36
22.5
1952*
37
22.5
1976*
38
22.6
1936*
39
22.6
1961*
40
22.7
1949*
41
22.8
1955*
42
22.9
1940*
43
22.9
2003*
44
23.1
1912*
45
23.2
1904*
46
23.3
1999*
47
23.4
1909*
48
23.8
1954*
49
24.0
1871*
50
24.1
1932*
51
24.1
1957*
52
24.2
1985*
53
24.4
1989*
54
24.5
1983*
55
24.6
1942*
56
25.0
1920*
57
25.0
2007*
58
25.1
1877*
59
25.1
1907*
60
25.2
1963*
61
25.5
1931*
62
25.6
1873*
63
25.7
2012
64
25.9
1875*
65
26.1
1982*
66
26.5
1911*
67
26.5
1967*
68
26.7
1951*
69
26.9
1905*
70
27.2
1958*
71
27.3
2024
72
27.4
1898*
73
27.4
2004*
74
27.8
1986*
75
27.9
1887*
76
28.3
1979*
77
28.4
1891*
78
28.7
1916*
79
28.7
1991*
80
28.7
1995*
81
29.0
1981*
82
29.7
1893*
83
29.8
1964*
84
30.0
1914*
85
30.2
1974*
86
30.4
2008*
87
30.4
2016
88
30.6
1881*
89
30.6
2001*
90
31.2
1988*
91
31.3
1886*
92
31.6
1970*
93
31.7
2010
94
31.9
2015
95
32.0
1946*
96
32.0
2013
97
32.0
2019
98
32.2
1968*
99
32.8
1965*
100
33.3
1899*
101
33.3
1993*
102
33.5
1978*
103
33.6
2026
104
33.8
1885*
105
33.8
1962*
106
34.0
2020
107
34.1
1902*
108
34.2
1945*
109
34.3
1937*
110
34.4
1915*
111
34.4
1929*
112
34.5
1878*
113
34.6
1895*
114
34.9
1941*
115
35.3
1894*
116
35.4
1971*
117
35.5
1880*
118
35.8
1939*
119
35.8
2009
120
35.8
2022
121
35.8
2025
122
36.0
1927*
123
36.9
1919*
124
37.2
1889*
125
37.5
1966*
126
38.2
1876*
127
38.3
1917*
128
38.3
1960*
129
38.6
1926*
130
38.6
1984*
131
38.7
1973*
132
39.0
1918*
133
39.0
1994*
134
39.1
2017
135
39.3
1969*
136
39.4
1908*
137
40.5
1980*
138
40.6
2000*
139
40.7
1925*
140
40.7
2014
141
42.0
2021
142
42.1
1987*
143
43.9
1879*
144
44.1
1903*
145
44.1
1956*
146
44.2
1892*
147
44.5
1921*
148
46.4
1924*
149
52.1
1992*
150
54.7
1998*
151
56.3
1890*
152
56.4
1923*
153
60.8
1906*
154
61.7
2002*
155
68.7
1977*
156
147.5
1975*
103
33.6
Current year
121
35.8
Last year

Rainfall annual extremes: highest and lowest annual maxima.
There are 156 valid years for the chosen period from 1871 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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