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Hampstead
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Last Full Update: 02 Aug 2026, 07:40 BSTUpdated: 02 Aug 26 07:40
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Historical Ranked Annual Data - Maximum Rain Rate / mm/h

TotalMax hourMax 10-minMax rateMean rateWet hoursWet % of day
Annual
MeanLowestHighestRangeCount ≥Count <
Threshold
0.21.03.051020
Start year
2009

Top annual highest
#
Value
Date
1
162
2016
2
126
2015
3
126
2014
4
120
2023
5
120
2012
6
119
2018
7
114
2022
8
108
2025
9
108
2013
10
102
2021
11
102
2020
12
100
2024
13
100
2017
14
100
2011
15
96
2009
16
92
2019
17
84
2026
18
65
2010
17
84
Current year
8
108
Last year
Bottom annual highest
#
Value
Date
1
65
2010
2
84
2026
3
92
2019
4
96
2009
5
100
2011
6
100
2017
7
100
2024
8
102
2020
9
102
2021
10
108
2013
11
108
2025
12
114
2022
13
119
2018
14
120
2012
15
120
2023
16
126
2014
17
126
2015
18
162
2016
2
84
Current year
11
108
Last year

Maximum Rain Rate annual extremes: highest and lowest annual maxima.
There are 18 valid years 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).

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