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Last Full Update: 02 Aug 2026, 09:55 BSTUpdated: 02 Aug 26 09:55
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Daily Data Tables - Maximum Hourly Rain / mm · Min (all years)

TotalMax hourMax 10-minMax rateMean rateWet hoursWet % of day
Threshold
0.21.03.05.010.020.0
20262025202420232022
Older
2021202020192018201720162015201420132012201120102009200820072006200520042003200220012000199919981997199619951994199319921991199019891988198719861985198419831982198119801979197819771976197519741973197219711970196919681967196619651964196319621961196019591958195719561955195419531952195119501949194819471946194519441943194219411940193919381937193619351934193319321931193019291928192719261925192419231922192119201919191819171916191519141913191219111910190919081907190619051904190319021901190018991898189718961895189418931892189118901889188818871886188518841883188218811880187918781877187618751874187318721871
Min
MinMaxMean
Start year
2009

Day
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1
0.0
0.2
0.2
1.1
0.2
0.2
0.3
0.3
1.7
0.2
0.2
1.2
2
0.2
0.0
0.7
0.9
0.2
0.2
0.2
0.2
0.4
0.8
0.3
0.2
3
0.2
0.2
0.2
0.9
0.9
0.3
0.5
0.2
0.3
0.3
0.2
0.2
4
0.3
0.0
0.2
0.2
0.5
0.5
0.5
0.3
0.4
0.0
0.5
0.2
5
0.2
0.2
0.2
0.5
0.2
0.2
0.0
0.5
0.3
0.5
0.2
0.2
6
0.2
0.3
0.3
0.2
1.2
0.2
0.5
0.4
0.2
0.5
0.2
0.2
7
0.0
0.0
0.2
0.3
0.3
0.2
0.9
0.4
0.5
0.7
0.6
0.4
8
0.2
0.2
0.2
0.3
0.2
0.8
0.2
0.3
0.6
0.2
0.2
0.2
9
0.2
0.2
0.9
0.3
0.2
0.2
0.3
1.2
0.3
0.2
0.2
0.5
10
0.3
0.2
0.2
0.5
0.3
0.2
0.2
0.2
0.2
0.2
0.2
0.2
11
0.0
0.3
0.3
0.5
0.2
0.2
0.2
0.2
0.9
0.2
0.2
0.2
12
0.0
0.2
0.3
0.2
0.2
0.2
1.1
0.3
0.3
0.3
0.3
0.0
13
0.4
0.2
0.3
0.7
0.2
0.3
0.0
0.2
0.8
0.3
0.2
0.0
14
0.3
0.0
0.2
1.9
0.5
0.2
0.0
0.3
0.2
0.2
0.2
0.2
15
0.2
0.2
0.2
0.2
0.5
0.2
0.0
0.2
0.0
0.2
0.0
0.3
16
0.3
0.2
0.2
0.3
0.2
0.3
0.0
0.3
0.2
0.2
0.2
0.2
17
0.0
0.0
0.2
0.2
0.2
0.2
1.4
0.2
0.8
0.4
0.2
0.0
18
0.3
0.2
0.2
0.8
0.2
0.2
0.2
0.5
0.3
0.3
0.0
0.4
19
0.2
0.2
0.2
1.5
0.2
0.2
0.4
0.2
0.2
0.6
0.7
0.7
20
0.0
0.2
0.2
1.4
0.2
0.2
0.2
0.4
0.7
0.4
0.2
0.5
21
1.0
0.8
0.3
0.4
0.4
0.9
0.0
0.4
0.5
0.2
0.3
0.2
22
0.4
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.5
0.7
0.2
0.2
23
0.0
0.0
0.8
0.2
0.2
1.2
0.2
0.7
0.4
1.2
0.2
0.5
24
0.2
0.0
0.2
0.2
0.7
0.5
0.3
0.5
0.8
0.8
0.2
0.2
25
0.0
0.2
0.6
0.4
0.0
0.2
1.0
0.2
0.4
0.2
0.2
0.5
26
0.2
0.0
0.3
0.4
0.2
0.3
0.3
0.3
0.2
0.2
0.2
0.2
27
0.6
0.6
1.0
0.2
0.8
0.7
0.2
0.2
1.1
0.2
0.2
0.4
28
0.0
0.8
0.3
0.3
0.2
0.0
0.5
0.2
0.3
0.4
0.0
0.2
29
0.2
1.7
0.3
0.4
0.0
0.4
0.9
0.2
0.0
0.2
0.2
0.9
30
0.2
0.2
0.9
0.2
0.4
1.1
0.2
0.7
0.0
0.2
0.3
31
0.2
0.2
1.0
0.6
9.3
0.4
0.3
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Lowest
0.0
0.0
0.2
0.2
0.0
0.0
0.0
0.2
0.0
0.0
0.0
0.0
Highest
1.0
1.7
1.0
1.9
1.2
1.2
1.4
9.3
1.7
1.2
0.7
1.2
Mean
0.2
0.3
0.3
0.6
0.3
0.3
0.4
0.6
0.5
0.4
0.2
0.3
Cumul
0.2
0.2
0.3
0.3
0.3
0.3
0.3
0.4
0.4
0.4
0.4
0.4

Maximum Hourly Rain in London, NW3 — calendar-day minimum across all years from 2009 onwards along with monthly summary: lowest, highest, mean, and the cumulative value for the year to the month's end.

Largest amount of rain that fell in any single hour during the day (midnight to midnight, local time).

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