Stanwell climate — normals and trends
Stanwell (United Kingdom) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.2 °C and it receives 615 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 (17.0 °C on average) and the coldest is January (4.2 °C). Rainfall peaks in November.
Stanwell averages 36 frost days, 1 hot days (≥ 30 °C) and 123 rainy days per year.
Stanwell has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The number of frost days there went from about 50 to 22 per year over the period.
The hottest day of the period reached 36.8 °C (on 19 July 2022) and the coldest -16.6 °C (on 10 February 1986).
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
StanwellEngland
- coords
- 51.45°, -0.48°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.2°C
Average daily high
13.4°C
Average daily low
6.9°C
Annual rainfall
615mm
Sunshine / day
7.5h
Mean relative humidity
80%
Average peak wind
20.6km/h
Seasonal range
12.8°C
Frost days (< 0 °C)
36 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
123 d/yr
Annual snowfall
12.5 cm
Average feels-like high
10.7 °C
Average feels-like low
3.9 °C
Average peak gust
41.2 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.47 · 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
36.8 °C
19 July 2022
Coldest day
-16.6 °C
10 February 1986
Wettest day
43 mm
15 March 1964
Windiest day
63.4 km/h
25 January 1990
Strongest gust
129.6 km/h
30 October 2000
Hottest feels-like
37.7 °C
28 July 1947
Coldest feels-like
-21.0 °C
10 February 1986
Snowiest day
14.9 cm
9 January 1968
Sunniest day
16.0 h
30 May 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 | 6.3 °C | -0.1 °C | 77 mm | +26 mm |
| Feb | 7.5 °C | +0.5 °C | 51 mm | +7 mm |
| Mar | 12.4 °C | +2.9 °C | 17 mm | -30 mm |
| Apr | 16.3 °C | +3.8 °C | 25 mm | -23 mm |
| May | 18.9 °C | +3.1 °C | 25 mm | -30 mm |
| Jun | 22.9 °C | +3.9 °C | 42 mm | -10 mm |
| Jul | 23.6 °C | +2.7 °C | 70 mm | +18 mm |
| Aug | 22.8 °C | +2.2 °C | 31 mm | -22 mm |
| Sep | 18.3 °C | +0.3 °C | 44 mm | -5 mm |
| Oct | 14.5 °C | +0.3 °C | 52 mm | -3 mm |
| Nov | 11.3 °C | +1.6 °C | 101 mm | +43 mm |
| Dec | 9.4 °C | +2.0 °C | 55 mm | +2 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 Stanwell?
Stanwell has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.2 °C and it receives 615 mm of precipitation per year.
What is the hottest day ever recorded in Stanwell?
The hottest day measured in Stanwell between 1940 and 2025 was 19 July 2022, reaching 36.8 °C.
What is the coldest day in Stanwell?
The coldest day measured in Stanwell between 1940 and 2025 was 10 February 1986, at -16.6 °C.
Does it snow in Stanwell?
Yes. Stanwell gets on average 12.5 cm of snow per year and has around 36 frost days.
Has the climate of Stanwell warmed?
Yes: Stanwell warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Stanwell?
The wettest day measured in Stanwell between 1940 and 2025 was 15 March 1964, with 43 mm of rain in 24 hours.
What was the windiest day in Stanwell?
The windiest day measured in Stanwell between 1940 and 2025 was 25 January 1990, with winds reaching 63.4 km/h.
What is the warmest month in Stanwell?
The warmest month in Stanwell is July (17.0 °C on average); the coldest is January (4.2 °C).
How much does it rain in Stanwell?
Stanwell receives on average 615 mm of precipitation per year, spread over about 123 rainy days.
Is it sunny in Stanwell?
Stanwell gets on average 7.5 hours of sunshine per day, roughly 2,738 hours per year over 1940-2025.
What is the biggest single-day snowfall in Stanwell?
The heaviest 24-hour snowfall measured in Stanwell between 1940 and 2025 was 9 January 1968, with 14.9 cm.
Are there tropical nights in Stanwell?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Stanwell.
What was the most extreme apparent temperature in Stanwell?
In Stanwell, between 1940 and 2025, the highest apparent temperature reached 37.7 °C on 28 July 1947, and the lowest was -21.0 °C on 10 February 1986.
Compare Stanwell with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Stanwell