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Last Full Update: 02 Aug 2026, 07:35 BSTUpdated: 02 Aug 26 07:35
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Historical Ranked Annual Data - Wet Hours / hrs

TotalMax hourMax 10-minMax rateMean rateWet hoursWet % of day
Annual
TotalLowestHighestRangeCount ≥Count <
Threshold
0.11351015
Start year
2009

Top annual range
#
Value
Date
1
23
2013
2
21
2014
3
21
2012
4
20
2020
5
20
2019
6
19
2025
7
17
2010
8
16
2017
9
16
2016
10
15
2024
11
15
2009
12
14
2026
13
14
2023
14
14
2022
15
14
2021
16
14
2018
17
14
2015
18
10
2011
12
14
Current year
6
19
Last year
Bottom annual range
#
Value
Date
1
10
2011
2
14
2015
3
14
2018
4
14
2021
5
14
2022
6
14
2023
7
14
2026
8
15
2009
9
15
2024
10
16
2016
11
16
2017
12
17
2010
13
19
2025
14
20
2019
15
20
2020
16
21
2012
17
21
2014
18
23
2013
7
14
Current year
13
19
Last year

Wet Hours annual extremes: highest and lowest annual ranges (daily max − min).
There are 18 valid years for the chosen period from 2009 to present in London, NW3. Data for Wet Hours begins in 2009.

Hours with measurable rainfall during the day (midnight to midnight, local time). Estimated heuristically from rain observations.

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