Historical Ranked Monthly Data - Mean Rain Rate / mm/h
Start year
Top monthly mean
#
Value
Date
1
5
Aug 2022
2
4.4
Jun 2023
3
3.9
Sep 2014
4
3.8
May 2025
5
2.9
Jul 2018
6
2.6
May 2020
7
2.6
Jun 2026
8
2.3
Jun 2009
9
2.3
Jul 2014
10
2.2
Jul 2017
11
2.2
Aug 2017
12
2.1
Sep 2009
13
2.1
Aug 2014
14
2.1
May 2010
15
2.1
Jul 2021
16
2.0
Oct 2016
17
2.0
Aug 2012
18
2.0
Aug 2010
19
2.0
Aug 2011
20
1.9
Sep 2010
21
1.9
Aug 2013
22
1.9
Aug 2020
23
1.9
May 2011
24
1.8
Jul 2013
25
1.7
Sep 2015
Bottom monthly mean
#
Value
Date
1
0.5
Apr 2011
2
0.5
Apr 2021
3
0.5
Feb 2023
4
0.5
Nov 2021
5
0.6
Jul 2022
6
0.6
Dec 2016
7
0.6
Mar 2022
8
0.6
Dec 2024
9
0.6
Jun 2024
10
0.6
Apr 2019
11
0.6
Nov 2019
12
0.6
Feb 2013
13
0.7
Mar 2013
14
0.7
Apr 2017
15
0.7
Jun 2019
16
0.7
Jan 2013
17
0.7
Apr 2018
18
0.7
Feb 2018
19
0.7
Feb 2025
20
0.7
Jan 2016
21
0.7
Feb 2015
22
0.7
Nov 2010
23
0.7
Jan 2017
24
0.7
Feb 2012
25
0.8
Mar 2019
Mean Rain Rate monthly extremes: highest and lowest monthly means.
There are 206 valid months for the chosen period from 2009 to present in London, NW3. Data for Mean Rain Rate begins in 2009.
Mean rain rate during periods of rain, i.e. rain over wet hours, for the day (midnight to midnight, local time).