Monthly Data Tables - Maximum Rain Rate / mm/h
Start year
Monthly Lowest Maximum Rain Rate
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year
Lowest
0.3
0.3
0.3
0.2
0.3
0.2
0.2
0.3
0
0.2
0.3
0
0
Highest
2.0
2.1
15
5
54
11
4.4
7
7
18
1.3
2.1
0.5
Mean
0.8
0.8
1.9
1.6
4.7
1.8
1.3
1.7
2.0
2.1
0.5
0.6
0.3
Maximum Rain Rate: lowest daily value each month for all months since 2009 in London, NW3. Data for Maximum Rain Rate begins in 2009.
Highest instantaneous rain rate (1-min avg) recorded during the day (midnight to midnight, local time).