London climate

Name: London
Address: CA

London is warmest in July, with average highs of 26 °C, and coldest in February, when nights average -8.9 °C. June is the wettest month (102 mm) and February the driest (59 mm). Figures are 1991–2020 climate normals.

Across a full year London averages 996 mm of rain, 61 days above 25 °C and 123 days below freezing.

Canada · population 422,324 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month July 26 °C
Coldest month February -8.9 °C
Driest month February 59 mm
Wettest month June 102 mm
Least cloud July 50 % cloud
Hottest on record July 35 °C
Coldest on record February -31 °C

What to expectLondon through the year

London has a clear annual cycle: average daily highs run from -0.1 °C in February to 26 °C in July, a swing of 27 °C in mean temperature across the year.

Counted across a normal year, 61 days a year reach 25 °C, 7 of them reach 30 °C, 123 nights drop below freezing. The warmest reading in the 1991–2020 record is 35 °C, in July.

Rain is spread fairly evenly through the year, from 59 mm in February to 102 mm in June. There is no dry season to aim for.

Month by month

Month	Avg high	Rainfall	Cloud
January	-1.2 °C	73 mm	79 %
February	-0.1 °C	59 mm	72 %
March	5.1 °C	69 mm	66 %
April	12.3 °C	92 mm	64 %
May	19.2 °C	98 mm	59 %
June	24.3 °C	102 mm	56 %
July	26.3 °C	101 mm	50 %
August	25.2 °C	83 mm	51 %
September	21.6 °C	85 mm	52 %
October	14.5 °C	86 mm	61 %
November	7.5 °C	78 mm	71 %
December	1.7 °C	70 mm	79 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C	Days below 0 °C
January	-1.2 °C	-8.5 °C	-5.1 °C	14.1 °C	-29.4 °C	0	0	28
February	-0.1 °C	-8.9 °C	-4.9 °C	17.0 °C	-30.8 °C	0	0	26
March	5.1 °C	-4.0 °C	0.1 °C	24.7 °C	-24.9 °C	0	0	23
April	12.3 °C	2.5 °C	6.9 °C	26.4 °C	-13.3 °C	0	0	9
May	19.2 °C	9.3 °C	14.0 °C	31.7 °C	-3.1 °C	4	0	0
June	24.3 °C	14.9 °C	19.4 °C	33.5 °C	4.4 °C	13	2	0
July	26.3 °C	17.4 °C	21.7 °C	35.4 °C	8.8 °C	21	3	0
August	25.2 °C	16.8 °C	20.8 °C	34.8 °C	8.3 °C	17	1	0
September	21.6 °C	13.4 °C	17.2 °C	31.7 °C	0.7 °C	6	0	0
October	14.5 °C	7.4 °C	10.6 °C	29.6 °C	-2.8 °C	0	0	1
November	7.5 °C	1.3 °C	4.1 °C	20.0 °C	-13.1 °C	0	0	12
December	1.7 °C	-4.1 °C	-1.4 °C	16.9 °C	-22.8 °C	0	0	25

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	73 mm	11	9.4 h/day	79 %	77 %	21 km/h
February	59 mm	9	11 h/day	72 %	75 %	21 km/h
March	69 mm	10	12 h/day	66 %	70 %	20 km/h
April	92 mm	12	13 h/day	64 %	67 %	20 km/h
May	98 mm	12	15 h/day	59 %	68 %	19 km/h
June	102 mm	12	15 h/day	56 %	70 %	17 km/h
July	101 mm	12	15 h/day	50 %	71 %	16 km/h
August	83 mm	11	14 h/day	51 %	74 %	15 km/h
September	85 mm	9	13 h/day	52 %	74 %	17 km/h
October	86 mm	12	11 h/day	61 %	75 %	19 km/h
November	78 mm	11	9.7 h/day	71 %	76 %	20 km/h
December	70 mm	11	9.0 h/day	79 %	79 %	20 km/h

How London compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
London	26 °C	-8.9 °C	996 mm	61
Kitchener · Canada	26 °C	-10 °C	920 mm	52
Hamilton · Canada	26 °C	-7.0 °C	913 mm	58
Brampton · Canada	26 °C	-9.6 °C	828 mm	60
Mississauga · Canada	26 °C	-8.6 °C	881 mm	57
Etobicoke · Canada	26 °C	-7.9 °C	804 mm	52

Where London ranks

Ranking	Position	Value
The coolest places in North America in December	22ndof 50	1.7 °C
The coolest places in North America in February	22ndof 50	-0.1 °C
The coolest places in North America in January	22ndof 50	-1.2 °C
The coolest places in North America in March	25thof 50	5.1 °C
The coolest places in North America in November	25thof 50	7.5 °C
The coolest places in North America year-round	26thof 50	13 °C

Planning a trip? See the best time to visit London.

QuestionsCommon questions about London’s climate

When is the best time to visit London?

That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, August sit closest to 20 °C on average, July is the warmest month and February the driest. The month-by-month table above has the full picture.

How hot does London get?

In July, the warmest month, daily highs average 26 °C. About 7 days a year pass 30 °C. The highest value in the 1991–2020 record is 35 °C.

How cold does it get in winter?

Nights average -8.9 °C in February, the coldest month. A normal year has 123 nights below freezing.

Which month is wettest in London?

June, averaging 102 mm over 12 days with rain. The driest month is February with 59 mm. The year as a whole averages 996 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in London rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.