Cosham climate — normals and trends
Cosham (United Kingdom) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 11.1 °C and it receives 755 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 August (17.0 °C on average) and the coldest is February (5.8 °C). Rainfall peaks in November.
Cosham averages 7 frost days, 0 hot days (≥ 30 °C) and 130 rainy days per year.
Cosham has warmed by +1.4 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The number of frost days there went from about 12 to 2 per year over the period.
The hottest day of the period reached 28.0 °C (on 27 June 1947) and the coldest -6.9 °C (on 21 January 1940).
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
CoshamEngland
- coords
- 50.85°, -1.06°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.1°C
Average daily high
12.9°C
Average daily low
9.2°C
Annual rainfall
755mm
Sunshine / day
8.4h
Mean relative humidity
81%
Average peak wind
28.0km/h
Seasonal range
11.2°C
Frost days (< 0 °C)
7 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
130 d/yr
Annual snowfall
7.0 cm
Average feels-like high
9.9 °C
Average feels-like low
5.5 °C
Average peak gust
42.6 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
11.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.39 · 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
28.0 °C
27 June 1947
Coldest day
-6.9 °C
21 January 1940
Wettest day
56 mm
18 June 2021
Windiest day
92.4 km/h
16 October 1987
Strongest gust
139.3 km/h
16 October 1987
Hottest feels-like
29.6 °C
4 August 1990
Coldest feels-like
-14.8 °C
12 January 1987
Snowiest day
11.1 cm
19 February 1978
Sunniest day
16.0 h
3 June 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 7.5 °C | 0.0 °C | 131 mm | +54 mm |
| Feb | 7.8 °C | +0.4 °C | 58 mm | -2 mm |
| Mar | 10.0 °C | +1.2 °C | 13 mm | -41 mm |
| Apr | 13.5 °C | +2.5 °C | 30 mm | -16 mm |
| May | 16.3 °C | +2.4 °C | 28 mm | -22 mm |
| Jun | 18.9 °C | +2.1 °C | 37 mm | -10 mm |
| Jul | 21.1 °C | +2.4 °C | 68 mm | +21 mm |
| Aug | 20.5 °C | +1.5 °C | 25 mm | -30 mm |
| Sep | 17.5 °C | +0.1 °C | 74 mm | +11 mm |
| Oct | 15.0 °C | +0.6 °C | 80 mm | -5 mm |
| Nov | 12.2 °C | +1.3 °C | 108 mm | +18 mm |
| Dec | 10.2 °C | +1.4 °C | 111 mm | +28 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 Cosham?
Cosham has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 11.1 °C and it receives 755 mm of precipitation per year.
What is the hottest day ever recorded in Cosham?
The hottest day measured in Cosham between 1940 and 2025 was 27 June 1947, reaching 28.0 °C.
What is the coldest day in Cosham?
The coldest day measured in Cosham between 1940 and 2025 was 21 January 1940, at -6.9 °C.
Does it snow in Cosham?
Yes. Cosham gets on average 7.0 cm of snow per year and has around 7 frost days.
Has the climate of Cosham warmed?
Yes: Cosham warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Cosham?
The wettest day measured in Cosham between 1940 and 2025 was 18 June 2021, with 56 mm of rain in 24 hours.
What was the windiest day in Cosham?
The windiest day measured in Cosham between 1940 and 2025 was 16 October 1987, with winds reaching 92.4 km/h.
What is the warmest month in Cosham?
The warmest month in Cosham is August (17.0 °C on average); the coldest is February (5.8 °C).
How much does it rain in Cosham?
Cosham receives on average 755 mm of precipitation per year, spread over about 130 rainy days.
Is it sunny in Cosham?
Cosham gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Cosham?
The heaviest 24-hour snowfall measured in Cosham between 1940 and 2025 was 19 February 1978, with 11.1 cm.
Are there tropical nights in Cosham?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Cosham.
What was the most extreme apparent temperature in Cosham?
In Cosham, between 1940 and 2025, the highest apparent temperature reached 29.6 °C on 4 August 1990, and the lowest was -14.8 °C on 12 January 1987.
Compare Cosham with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Cosham