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Monthly Data Tables - Rainfall / mm

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

Monthly Range Rainfall
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year
2026
17.0
14.2
10.0
1.0
3.8
33.6
0.0
0.0
9.9
2025
31.0
15.8
2.0
17.2
27.8
12.6
35.8
19.2
17.4
13.4
11.0
20.6
18.6
2024
17.9
18.2
12.4
20.4
16.3
4.6
25.0
16.3
27.3
15.2
24.9
13.4
17.7
2023
10.1
2.9
12.5
11.3
10.4
13.9
9.8
13.2
21.4
14.1
12.5
11.5
12.0
2022
7.0
9.4
9.1
6.7
4.6
8.9
0.7
35.8
12.5
30.2
27.4
14.2
13.9
2021
25.2
12.0
6.5
1.9
12.0
19.7
42.0
9.8
17.5
25.2
3.8
20.4
16.3
2020
9.1
15.6
12.4
13.1
5.3
20.7
7.6
13.8
5.3
34.0
10.6
15.4
13.6
2019
7.7
13.2
9.7
2.6
13.6
21.3
11.0
13.4
32.0
17.6
9.2
15.2
13.9
2018
12.8
8.4
11.7
13.6
16.3
0.2
16.9
15.2
12.1
12.5
19.1
11.2
12.5
2017
15.9
9.1
10.0
1.1
35.6
18.5
29.7
39.1
13.9
7.0
12.3
20.5
17.7
2016
16.1
13.0
13.9
21.1
17.7
30.4
11.2
7.7
20.6
10.6
20.8
6.6
15.8
2015
15.8
6.5
6.3
5.2
14.4
4.1
31.9
17.5
26.1
13.1
7.9
6.1
12.9
2014
16.8
8.5
8.6
6.2
14.5
5.6
11.7
38.5
29.3
40.7
29.8
10.7
18.4
2013
8.0
12.9
12.5
10.2
14.7
4.2
12.2
19.2
32.0
15.2
11.6
15.2
14.0
2012
10.6
8.0
11.2
16.9
16.4
25.7
19.8
15.8
21.8
15.6
17.3
21.7
16.7
2011
16.1
12.3
4.4
1.4
14.5
14.7
13.7
14.6
21.7
3.6
13.4
9.1
11.6
2010
9.0
27.0
4.9
4.6
31.7
8.5
3.8
21.0
11.7
25.4
4.9
8.0
13.4
2009
14.0
20.0
16.0
7.7
11.9
35.8
10.2
34.3
25.5
7.2
16.9
11.5
17.6
2008*
9.8
4.0
15.4
12.7
20.3
8.9
18.2
8.2
30.4
7.6
11.7
10.8
13.2
2007*
11.1
15.5
15.4
1.9
25.0
7.0
19.3
11.1
6.5
14.4
23.9
11.1
13.5
2006*
5.7
9.5
10.0
6.9
11.4
7.8
20.6
17.3
15.1
13.9
16.0
8.2
11.9
2005*
4.3
6.6
16.1
8.4
6.7
13.6
13.1
10.6
13.4
21.1
6.5
16.9
11.4
2004*
9.4
6.4
7.0
19.3
11.3
16.5
16.7
19.0
5.5
27.4
15.3
11.7
13.8
2003*
13.9
7.6
6.1
6.2
7.3
17.2
6.3
9.8
9.8
13.1
22.9
9.8
10.8
2002*
16.5
20.5
11.3
9.6
13.3
21.2
13.9
61.7
20.6
12.5
14.9
23.2
19.9
2001*
18.4
15.7
11.3
10.9
9.4
24.3
17.7
19.0
11.1
30.6
30.6
7.4
17.2
2000*
7.0
16.6
9.2
14.8
19.0
6.2
14.8
20.8
36.4
40.6
18.5
13.5
18.1
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year
Lowest
4.3
2.9
2.0
1.0
3.8
0.2
0.0
0.0
5.3
3.6
3.8
6.1
9.9
Highest
31.0
27.0
16.1
21.1
35.6
35.8
42.0
61.7
36.4
40.7
30.6
23.2
19.9
Mean
13.2
12.2
10.2
9.4
15.0
15.0
16.1
19.3
19.1
18.5
15.9
13.2
14.7

Rainfall: range of daily values each month (max − min) for all months since 2000 in London, NW3. Data for Rainfall begins in 1871.

Figures in brackets refer to departure from recent average conditions (the anomaly for the current month is unadjusted for the month's degree of completeness).

*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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