Detailed Rainfall Data

Current/Latest conditions

Rainfall Today

2.8 mm

Rain Last 10 mins

0.0 mm

Rain Rate

0.3 mm/h

Rain Last Hour

0.2 mm

Rain Last 24 hrs

3.2 mm

Wet Hours Today

3 hrs

Last 24hrs Wet

4 hrs

Most Recent Rain

46 mins ago

Yesterday's Rain

0.4 mm

Yesterday's Wet Hours

2 hrs

Monthly Rain

9.6 mm (-81%)

Annual Rain

352.6 mm (-6%)

Summer Total

115.6 mm (-21%)

Current Spell

3 wet days

Measure

Last 12 months: Total Rainfall

Measure

Aggregation

Overlay

Averages, Extremes, and Records

Start year

1871 1950 2009

Recent

Rain	7-day	Aug	31-day	Year	365-day
Total	7.6 mm (-38%)	9.6 mm (-81%)	9.6 mm (-82%)	352.6 mm (-6%)	598.7 mm (-3%)
Wettest Day	4.4 mm 27th	4.4 mm 27th	4.4 mm 27th	33.6 mm 2nd Jun	33.6 mm 2nd Jun
Rain Days	3 days	6 days (-20%)	6 days	86 days (+13%)	141 days
Max Hourly	1.8 mm 27th	1.8 mm 27th	1.8 mm 27th	32.0 mm 23rd Jun	32.0 mm 23rd Jun
Max 10-min	0.8 mm 27th	0.8 mm 27th	0.8 mm 27th	9.4 mm 23rd Jun	9.4 mm 23rd Jun
Wet Hours	8 hrs	13 hrs	13 hrs	314 hrs	540 hrs

Long-term record (1871-2026)

Rain	Overall	Aug (all)	29th Aug
Mean	1.6 mm (-3%)	1.8 mm (+2%)	1.5 mm (-16%)
Wettest Day	147.5 mm 15th Aug 1975*	147.5 mm Day 15, 1975*	20.2 mm 1934*
Rain Days	49%	44%	37%
Max Hourly	33.3 mm 27 Jun 2009	23.3 mm Day 10, 2014	7.0 mm 2025
Max 10-min	13.0 mm 12 Jun 2023	9.9 mm Day 17, 2022	2.0 mm 2012
Wet Hours	1.6 hrs (-0%)	1.1 hrs (-8%)	1.2 hrs (-2%)

Record Period Averages

Measure	7-day	Monthly	Aug	31-day	Annual	365-day
Wettest	153.7 mm 20th Aug 1975*	177.3 mm Jun 1903*	159.4 mm Aug 1975*	213.9 mm 20th Jun 1903*	940.8 mm 1903*	1016.7 mm 31st Mar 2001*
Driest	0.0 mm 17 Mar 2009	0.0 mm Jul 2026	1.5 mm Aug 1995*	0.0 mm 28 Jul 2026	343.1 mm 1921*	294.8 mm 29th Sep 1976*
Most Wet Hours	71 hrs 05 Oct 2020	132 hrs Oct 2020	68 hrs Aug 2015	140 hrs 07 Feb 2026	725 hrs 2012	877 hrs 30 Mar 2013
Fewest Wet Hours	0 hrs 24 Apr 2009	0 hrs Jul 2026	13 hrs Current	0 hrs 28 Jul 2026	314 hrs 2026	357 hrs 28 Feb 2012

Wet and Dry Spells

Period	Longest Wet Spell	Longest Dry Spell
Current month	3 days 18 Aug 2026 - 20 Aug 2026	51 days 28 Jun 2026 - 17 Aug 2026
Current year	9 days 05 Feb 2026 - 13 Feb 2026	51 days 28 Jun 2026 - 17 Aug 2026
Long-term record (1871-2026)	28 days 28 Jan 1931* - 24 Feb 1931*	51 days 28 Jun 2026 - 17 Aug 2026
August (all years)	21 days 06 Aug 1927* - 26 Aug 1927*	38 days 22 Jul 1976* - 28 Aug 1976*

Longest Wet and Dry Spells

Longest Wet Spells

Rank	Length	Period
1	28 days	28 Jan 1931* - 24 Feb 1931*
2	25 days	13 Jan 1937* - 06 Feb 1937*
3	24 days	09 Oct 1928* - 01 Nov 1928*
4	24 days	23 Nov 1929* - 16 Dec 1929*
5	21 days	06 Aug 1927* - 26 Aug 1927*
6	21 days	09 Nov 1960* - 29 Nov 1960*
7	20 days	24 Dec 1876* - 12 Jan 1877*
8	20 days	20 Feb 1927* - 11 Mar 1927*
9	20 days	17 Oct 1960* - 05 Nov 1960*
10	20 days	25 Jan 2003* - 13 Feb 2003*

Longest Dry Spells

Rank	Length	Period
1	51 days	28 Jun 2026 - 17 Aug 2026
2	38 days	22 Jul 1976* - 28 Aug 1976*
3	34 days	21 Feb 1953* - 26 Mar 1953*
4	31 days	17 May 1970* - 16 Jun 1970*
5	30 days	18 Mar 1893* - 16 Apr 1893*
6	30 days	11 Apr 1942* - 10 May 1942*
7	30 days	15 Jun 1949* - 14 Jul 1949*
8	30 days	12 Nov 1989* - 11 Dec 1989*
9	29 days	31 Aug 1941* - 28 Sep 1941*
10	29 days	24 Aug 1959* - 21 Sep 1959*

Cumulative rainfall vs recent extreme years (2014, 2011) and last year

Past Year Monthly Averages and Extremes (August 2025 - August 2026)

Month	Total	Wettest Day	Rain Days	Max Hourly	Max 10-min	Wet Hours
Aug 2025	25.0 mm (-54%)	19.2 mm 29th	8 days (0%)	7.0 mm 29th	2.4 mm 27th	16 hrs (-59%)
Sep 2025	50.3 mm (+1%)	17.4 mm 3rd	13 days (+44%)	4.8 mm 3rd	2.0 mm 12th	37 hrs (-10%)
Oct 2025	71.7 mm (+10%)	13.4 mm 20th	12 days (+9%)	10.8 mm 31st	6.8 mm 31st	59 hrs (+21%)
Nov 2025	62.7 mm (-6%)	11.0 mm 10th	16 days (+60%)	5.2 mm 10th	1.8 mm 10th	66 hrs (+6%)
Dec 2025	60.4 mm (+6%)	20.6 mm 18th	13 days (+18%)	3.8 mm 18th	2.2 mm 2nd	60 hrs (-3%)
Jan 2026	103.2 mm (+75%)	17.0 mm 8th	21 days (+91%)	5.6 mm 7th	1.6 mm 7th	106 hrs (+59%)
Feb 2026	96.6 mm (+115%)	14.2 mm 15th	22 days (+144%)	5.0 mm 11th	2.2 mm 11th	103 hrs (+98%)
Mar 2026	28.3 mm (-27%)	10.0 mm 6th	10 days (0%)	7.2 mm 13th	4.0 mm 13th	28 hrs (-48%)
Apr 2026	2.3 mm (-95%)	1.0 mm 5th	5 days (-50%)	1.0 mm 5th	1.0 mm 5th	3 hrs (-94%)
May 2026	11.4 mm (-75%)	3.8 mm 13th	8 days (-11%)	2.2 mm 14th	1.8 mm 14th	14 hrs (-64%)
Jun 2026	101.2 mm (+115%)	33.6 mm 2nd	14 days (+56%)	32.0 mm 23rd	9.4 mm 23rd	47 hrs (+28%)
Jul 2026	0.0 mm (-100%)	0.0 mm 1st	0 days (-100%)	-	-	0 hrs (-100%)
Aug 2026	9.6 mm (-82%)	4.4 mm 27th	6 days (-25%)	1.8 mm 27th	0.8 mm 27th	13 hrs (-66%)

View daily tables of min / max / mean Rain data for the past year
View monthly tables of min / max / mean Rain data for all months in the station history.

Past Year Seasonal Averages

Season	Total	Wet Hours	Rain Days
Winter 25/26	260.2 mm (+62%)	269 hrs (+49%)	56 days (+81%)
Spring 2026	42.0 mm (-67%)	45 hrs (-68%)	23 days (-21%)
Summer 2025	115.6 mm (-21%)	80 hrs (-27%)	23 days (-8%)
Autumn 2025	184.7 mm (+1%)	163 hrs (+6%)	41 days (+37%)

Past 24hrs and current year cumulative trends for Rain

View more Rain charts

Ranked Historical Rain Data

Wettest Days

Rank	Total	Wet Hours	Max Hourly	Max 10-min
1	147.5 mm 15th Aug 1975*	23 hrs 10 Feb 2013	33.3 mm 27 Jun 2009	13.0 mm 12 Jun 2023
2	68.7 mm 17th Aug 1977*	21 hrs 13 Oct 2014	32.0 mm 23 Jun 2026	10.6 mm 12 May 2025
3	61.7 mm 8th Aug 2002*	21 hrs 11 Jun 2012	26.4 mm 12 May 2025	10.4 mm 25 Jul 2021
4	60.8 mm 29th Jun 1906*	20 hrs 02 Oct 2020	25.5 mm 25 Jul 2021	9.9 mm 17 Aug 2022
5	56.4 mm 10th Jul 1923*	20 hrs 03 Jun 2012	23.3 mm 10 Aug 2014	9.4 mm 23 Jun 2026
6	56.3 mm 18th Jul 1890*	20 hrs 24 Aug 2013	23.1 mm 17 Aug 2022	8.9 mm 10 Aug 2014
7	54.7 mm 1st Jan 1998*	20 hrs 01 Feb 2019	20.0 mm 12 Jul 2021	8.3 mm 05 Aug 2012
8	52.1 mm 23rd Sep 1992*	19 hrs 05 Jan 2025	18.7 mm 20 Sep 2014	8.2 mm 02 Nov 2022
9	46.4 mm 30th Jul 1924*	18 hrs 23 Mar 2013	18.5 mm 02 Nov 2022	8.0 mm 27 Jun 2009
10	44.5 mm 12th Sep 1921*	18 hrs 10 Jun 2019	18.4 mm 06 Sep 2011	7.9 mm 20 Sep 2014

View more daily rankings

Wettest Months

Rank	Total	Wet Hours	Rain Days
1	177.3 mm Jun 1903*	132 hrs Oct 2020	30 days Jan 2014
2	166.6 mm Jul 1924*	122 hrs Jan 2014	30 days Oct 1903*
3	166.5 mm Dec 1914*	108 hrs Jun 2012	30 days Oct 1892*
4	165.8 mm Oct 2020	106 hrs Jan 2026	29 days Oct 1882*
5	159.4 mm Aug 1975*	105 hrs Dec 2019	29 days Oct 1891*
6	159.1 mm Aug 1878*	104 hrs Apr 2012	28 days Jan 1894*
7	158.8 mm Nov 1940*	103 hrs Nov 2009	28 days Dec 1934*
8	150.8 mm Oct 2000*	103 hrs Feb 2026	28 days Oct 1889*
9	150.7 mm Oct 1987*	103 hrs Mar 2023	27 days Jan 1883*
10	146.3 mm Oct 1880*	101 hrs Dec 2012	27 days Oct 1960*

Driest Months

Rank	Total	Wet Hours	Rain Days
1	0.0 mm Jul 2026	0 hrs Jul 2026	0 days Jul 2026
2	0.8 mm Jun 2018	2 hrs May 2020	2 days Sep 1929*
3	1.5 mm Aug 1995*	3 hrs Apr 2026	2 days Aug 1976*
4	1.7 mm May 1880*	4 hrs Jun 2018	2 days Sep 1959*
5	1.8 mm Apr 2011	4 hrs Apr 2011	2 days May 2020
6	2.0 mm Sep 1959*	4 hrs Apr 2017	3 days Sep 1941*
7	2.3 mm Apr 2026	5 hrs Mar 2025	3 days Jun 1925*
8	2.3 mm Jul 2022	6 hrs Jul 2022	3 days Jul 1976*
9	2.3 mm Aug 1940*	6 hrs Apr 2021	3 days Jun 1976*
10	2.5 mm Apr 1893*	8 hrs Feb 2023	3 days Jun 1942*

View more mean rankings

Wettest Years

Rank	Total	Wet Hours	Rain Days
1	940.8 mm 1903*	725 hrs 2012	256 days 1894*
2	887.7 mm 2002*	691 hrs 2019	247 days 1930*
3	868.7 mm 2000*	676 hrs 2013	241 days 1879*
4	843.9 mm 1924*	669 hrs 2024	235 days 1882*
5	840.4 mm 1927*	662 hrs 2023	232 days 1891*

Driest Years

Rank	Total	Wet Hours	Rain Days
1	343.1 mm 1921*	314 hrs Current	86 days Current
2	352.6 mm Current	407 hrs 2011	115 days 1976*
3	405.9 mm 1996*	424 hrs 2009	119 days 1973*
4	408.3 mm 1933*	472 hrs 2022	121 days 2025
5	420.8 mm 1976*	486 hrs 2025	125 days 1921*

View more mean rankings

Wettest Days in August

Rank	Total	Wet Hours	Max Hourly	Max 10-min
1	147.5 mm Day 15, 1975*	20 hrs Day 24, 2013	23.3 mm Day 10, 2014	9.9 mm Day 17, 2022
2	68.7 mm Day 17, 1977*	16 hrs Day 25, 2014	23.1 mm Day 17, 2022	8.9 mm Day 10, 2014
3	61.7 mm Day 8, 2002*	16 hrs Day 9, 2017	14.1 mm Day 5, 2012	8.3 mm Day 5, 2012
4	44.2 mm Day 28, 1892*	12 hrs Day 31, 2015	11.2 mm Day 9, 2017	7.0 mm Day 15, 2022
5	39.3 mm Day 3, 1969*	12 hrs Day 2, 2023	10.0 mm Day 16, 2020	6.7 mm Day 24, 2013

Wettest Augusts

Rank	Total	Wet Hours	Rain Days
1	159.4 mm Aug 1975*	68 hrs Aug 2015	25 days Aug 1931*
2	159.1 mm Aug 1878*	57 hrs Aug 2010	25 days Aug 1912*
3	133.5 mm Aug 1977*	52 hrs Aug 2014	24 days Aug 1917*
4	125.8 mm Aug 2002*	47 hrs Aug 2017	24 days Aug 1927*
5	125.6 mm Aug 1879*	43 hrs Aug 2013	24 days Aug 1956*

Driest Augusts

Rank	Total	Wet Hours	Rain Days
1	1.5 mm Aug 1995*	13 hrs Current	2 days Aug 1976*
2	2.3 mm Aug 1940*	16 hrs Aug 2025	4 days Aug 2022
3	4.5 mm Aug 1947*	16 hrs Aug 2012	4 days Aug 2003*
4	7.4 mm Aug 1976*	17 hrs Aug 2022	4 days Aug 1995*
5	8.3 mm Aug 1899*	22 hrs Aug 2009	4 days Aug 1947*

*Data from before 2009 are mostly from the historical site at Whitestone Pond in Hampstead. Where data from that record is missing, other nearby sites were used, including St James Park, Heathrow, and Kew Gardens (pre-1910). Best efforts have been made to adjust for site differences, but uncertainties are somewhat greater for this data. I am grateful to the Met Office for making this data available for free through the MIDAS Open database.

Rainfall totals and extremes for each calendar day run midnight to midnight (local time), when the rain tip counter is reset.

Notes

Station rain records began in February 2009. A long-term series from nearby sites is available from 1871 (use Start year above).
The minimum recordable rain (the rain gauge resolution) is 0.2 mm
Figures in brackets refer to departure from average conditions (as a percentage for rainfall)
Rain rate records are manually checked, and changed if necessary, due to occasional lag in data transmission. Initial high readings may well be corrected at a later date.

View daily totals for the past year