Runcorn climate — normals and trends
Runcorn (United Kingdom) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.8 °C and it receives 817 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 (16.1 °C on average) and the coldest is January (4.2 °C). Rainfall peaks in August.
Runcorn averages 34 frost days, 0 hot days (≥ 30 °C) and 156 rainy days per year.
Runcorn 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 51 to 17 per year over the period.
The hottest day of the period reached 33.9 °C (on 18 July 2022) and the coldest -17.2 °C (on 25 January 1963).
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
RuncornEngland
- coords
- 53.34°, -2.73°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.8°C
Average daily high
12.9°C
Average daily low
6.8°C
Annual rainfall
817mm
Sunshine / day
7.7h
Mean relative humidity
81%
Average peak wind
20.4km/h
Seasonal range
11.9°C
Frost days (< 0 °C)
34 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
156 d/yr
Annual snowfall
16.0 cm
Average feels-like high
10.4 °C
Average feels-like low
3.9 °C
Average peak gust
40.0 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.44 · 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
33.9 °C
18 July 2022
Coldest day
-17.2 °C
25 January 1963
Wettest day
61 mm
24 September 2012
Windiest day
63.4 km/h
30 November 1954
Strongest gust
127.4 km/h
23 February 1967
Hottest feels-like
34.4 °C
19 July 2022
Coldest feels-like
-22.0 °C
25 January 1963
Snowiest day
14.5 cm
24 February 1958
Sunniest day
16.3 h
24 June 2018
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 | -0.2 °C | 115 mm | +52 mm |
| Feb | 8.1 °C | +1.0 °C | 30 mm | -22 mm |
| Mar | 12.4 °C | +3.0 °C | 22 mm | -37 mm |
| Apr | 16.1 °C | +4.0 °C | 36 mm | -26 mm |
| May | 18.7 °C | +3.3 °C | 40 mm | -31 mm |
| Jun | 20.9 °C | +2.8 °C | 91 mm | +18 mm |
| Jul | 20.9 °C | +1.3 °C | 54 mm | -23 mm |
| Aug | 21.6 °C | +2.3 °C | 33 mm | -49 mm |
| Sep | 17.5 °C | +0.4 °C | 118 mm | +47 mm |
| Oct | 13.9 °C | +0.3 °C | 58 mm | -13 mm |
| Nov | 10.9 °C | +1.4 °C | 112 mm | +44 mm |
| Dec | 9.4 °C | +2.0 °C | 120 mm | +52 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 Runcorn?
Runcorn has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.8 °C and it receives 817 mm of precipitation per year.
What is the hottest day ever recorded in Runcorn?
The hottest day measured in Runcorn between 1940 and 2025 was 18 July 2022, reaching 33.9 °C.
What is the coldest day in Runcorn?
The coldest day measured in Runcorn between 1940 and 2025 was 25 January 1963, at -17.2 °C.
Does it snow in Runcorn?
Yes. Runcorn gets on average 16.0 cm of snow per year and has around 34 frost days.
Has the climate of Runcorn warmed?
Yes: Runcorn warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Runcorn?
The wettest day measured in Runcorn between 1940 and 2025 was 24 September 2012, with 61 mm of rain in 24 hours.
What was the windiest day in Runcorn?
The windiest day measured in Runcorn between 1940 and 2025 was 30 November 1954, with winds reaching 63.4 km/h.
What is the warmest month in Runcorn?
The warmest month in Runcorn is July (16.1 °C on average); the coldest is January (4.2 °C).
How much does it rain in Runcorn?
Runcorn receives on average 817 mm of precipitation per year, spread over about 156 rainy days.
Is it sunny in Runcorn?
Runcorn gets on average 7.7 hours of sunshine per day, roughly 2,811 hours per year over 1940-2025.
What is the biggest single-day snowfall in Runcorn?
The heaviest 24-hour snowfall measured in Runcorn between 1940 and 2025 was 24 February 1958, with 14.5 cm.
Are there tropical nights in Runcorn?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Runcorn.
What was the most extreme apparent temperature in Runcorn?
In Runcorn, between 1940 and 2025, the highest apparent temperature reached 34.4 °C on 19 July 2022, and the lowest was -22.0 °C on 25 January 1963.
Compare Runcorn with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Runcorn