Winchester climate — normals and trends
Winchester (United Kingdom) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.2 °C and it receives 712 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (16.9 °C on average) and the coldest is January (4.3 °C). Rainfall peaks in November.
Winchester averages 39 frost days, 1 hot days (≥ 30 °C) and 126 rainy days per year.
Winchester has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The number of frost days there went from about 53 to 25 per year over the period.
The hottest day of the period reached 34.3 °C (on 28 July 1947) and the coldest -14.8 °C (on 28 December 1964).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
WinchesterEngland
- coords
- 51.07°, -1.32°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.2°C
Average daily high
13.5°C
Average daily low
6.8°C
Annual rainfall
712mm
Sunshine / day
7.9h
Mean relative humidity
81%
Average peak wind
20.7km/h
Seasonal range
12.6°C
Frost days (< 0 °C)
39 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
126 d/yr
Annual snowfall
10.3 cm
Average feels-like high
10.9 °C
Average feels-like low
3.9 °C
Average peak gust
41.4 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
11.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.43 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
34.3 °C
28 July 1947
Coldest day
-14.8 °C
28 December 1964
Wettest day
72 mm
18 June 2021
Windiest day
68.5 km/h
16 October 1987
Strongest gust
137.9 km/h
25 January 1990
Hottest feels-like
37.3 °C
28 July 1947
Coldest feels-like
-19.5 °C
10 February 1986
Snowiest day
13.2 cm
27 December 1964
Sunniest day
16.0 h
3 June 1940
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 6.8 °C | +0.1 °C | 108 mm | +46 mm |
| Feb | 7.9 °C | +0.7 °C | 50 mm | -2 mm |
| Mar | 12.2 °C | +2.5 °C | 13 mm | -41 mm |
| Apr | 16.4 °C | +3.8 °C | 36 mm | -18 mm |
| May | 18.7 °C | +2.8 °C | 32 mm | -31 mm |
| Jun | 21.6 °C | +2.6 °C | 51 mm | -6 mm |
| Jul | 23.6 °C | +2.7 °C | 64 mm | +10 mm |
| Aug | 22.4 °C | +1.9 °C | 35 mm | -25 mm |
| Sep | 18.0 °C | 0.0 °C | 66 mm | +10 mm |
| Oct | 14.7 °C | +0.5 °C | 66 mm | -2 mm |
| Nov | 11.6 °C | +1.6 °C | 100 mm | +32 mm |
| Dec | 9.6 °C | +2.0 °C | 75 mm | +11 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Winchester?
Winchester has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.2 °C and it receives 712 mm of precipitation per year.
What is the hottest day ever recorded in Winchester?
The hottest day measured in Winchester between 1940 and 2025 was 28 July 1947, reaching 34.3 °C.
What is the coldest day in Winchester?
The coldest day measured in Winchester between 1940 and 2025 was 28 December 1964, at -14.8 °C.
Does it snow in Winchester?
Yes. Winchester gets on average 10.3 cm of snow per year and has around 39 frost days.
Has the climate of Winchester warmed?
Yes: Winchester warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Winchester?
The wettest day measured in Winchester between 1940 and 2025 was 18 June 2021, with 72 mm of rain in 24 hours.
What was the windiest day in Winchester?
The windiest day measured in Winchester between 1940 and 2025 was 16 October 1987, with winds reaching 68.5 km/h.
What is the warmest month in Winchester?
The warmest month in Winchester is July (16.9 °C on average); the coldest is January (4.3 °C).
How much does it rain in Winchester?
Winchester receives on average 712 mm of precipitation per year, spread over about 126 rainy days.
Is it sunny in Winchester?
Winchester gets on average 7.9 hours of sunshine per day, roughly 2,884 hours per year over 1940-2025.
What is the biggest single-day snowfall in Winchester?
The heaviest 24-hour snowfall measured in Winchester between 1940 and 2025 was 27 December 1964, with 13.2 cm.
Are there tropical nights in Winchester?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Winchester.
What was the most extreme apparent temperature in Winchester?
In Winchester, between 1940 and 2025, the highest apparent temperature reached 37.3 °C on 28 July 1947, and the lowest was -19.5 °C on 10 February 1986.
Compare Winchester with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Winchester