Historical Ranked Monthly Data - Maximum Rain Rate / mm/h
Start year
Top monthly mean
#
Value
Date
1
65
Aug 2022
2
54
May 2020
3
53
Oct 2016
4
46
Sep 2014
5
38
Jul 2016
6
37
Sep 2016
7
37
May 2024
8
36
Aug 2013
9
36
Jun 2023
10
34
Jul 2018
11
33
Aug 2014
12
31
May 2010
13
31
Jul 2014
14
31
May 2025
15
30
Aug 2012
16
30
Sep 2015
17
29
Aug 2010
18
29
Sep 2023
19
28
Jul 2024
20
28
Jun 2017
21
28
Jun 2009
22
28
Jul 2017
23
27
Jun 2026
24
27
May 2016
25
27
Aug 2017
Bottom monthly mean
#
Value
Date
1
1.0
Apr 2021
2
1.9
Feb 2023
3
2.8
Mar 2011
4
3.0
Mar 2025
5
3.0
Oct 2009
6
3.2
Dec 2009
7
3.7
Feb 2019
8
3.8
Feb 2018
9
3.8
Nov 2021
10
3.8
Mar 2013
11
4.0
Apr 2019
12
4.3
Nov 2019
13
4.3
Jan 2010
14
4.4
Mar 2022
15
4.5
May 2022
16
4.5
Aug 2016
17
4.7
Feb 2011
18
4.7
Feb 2025
19
4.9
Dec 2023
20
5
Mar 2021
21
5
Apr 2018
22
6
Dec 2016
23
6
Feb 2024
24
6
Oct 2018
25
6
Jan 2021
Maximum Rain Rate monthly extremes: highest and lowest monthly means.
There are 204 valid months for the chosen period from 2009 to present 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).