Grimsby climate — normals and trends
Grimsby (United Kingdom) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.8 °C and it receives 634 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 (16.3 °C on average) and the coldest is January (4.0 °C). Rainfall peaks in August.
Grimsby averages 30 frost days, 0 hot days (≥ 30 °C) and 134 rainy days per year.
Grimsby 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 44 to 16 per year over the period.
The hottest day of the period reached 37.5 °C (on 19 July 2022) and the coldest -12.1 °C (on 23 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
GrimsbyEngland
- coords
- 53.57°, -0.08°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.8°C
Average daily high
12.8°C
Average daily low
6.8°C
Annual rainfall
634mm
Sunshine / day
7.8h
Mean relative humidity
80%
Average peak wind
25.2km/h
Seasonal range
12.3°C
Frost days (< 0 °C)
30 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
134 d/yr
Annual snowfall
15.1 cm
Average feels-like high
9.6 °C
Average feels-like low
3.2 °C
Average peak gust
44.4 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.40 · 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
37.5 °C
19 July 2022
Coldest day
-12.1 °C
23 January 1963
Wettest day
46 mm
13 September 1993
Windiest day
69.9 km/h
3 January 1976
Strongest gust
128.9 km/h
9 February 2020
Hottest feels-like
34.1 °C
19 July 2022
Coldest feels-like
-17.1 °C
25 February 1947
Snowiest day
12.9 cm
23 January 1984
Sunniest day
16.0 h
21 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 | 5.8 °C | -0.4 °C | 83 mm | +33 mm |
| Feb | 7.5 °C | +0.7 °C | 33 mm | -8 mm |
| Mar | 11.8 °C | +2.8 °C | 14 mm | -32 mm |
| Apr | 14.4 °C | +3.0 °C | 15 mm | -32 mm |
| May | 16.3 °C | +1.8 °C | 25 mm | -30 mm |
| Jun | 22.2 °C | +4.4 °C | 52 mm | -5 mm |
| Jul | 22.1 °C | +2.1 °C | 80 mm | +18 mm |
| Aug | 21.8 °C | +1.9 °C | 24 mm | -39 mm |
| Sep | 18.3 °C | +0.7 °C | 72 mm | +19 mm |
| Oct | 14.0 °C | +0.1 °C | 61 mm | +8 mm |
| Nov | 10.9 °C | +1.4 °C | 122 mm | +67 mm |
| Dec | 9.3 °C | +2.1 °C | 80 mm | +29 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 Grimsby?
Grimsby has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.8 °C and it receives 634 mm of precipitation per year.
What is the hottest day ever recorded in Grimsby?
The hottest day measured in Grimsby between 1940 and 2025 was 19 July 2022, reaching 37.5 °C.
What is the coldest day in Grimsby?
The coldest day measured in Grimsby between 1940 and 2025 was 23 January 1963, at -12.1 °C.
Does it snow in Grimsby?
Yes. Grimsby gets on average 15.1 cm of snow per year and has around 30 frost days.
Has the climate of Grimsby warmed?
Yes: Grimsby warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Grimsby?
The wettest day measured in Grimsby between 1940 and 2025 was 13 September 1993, with 46 mm of rain in 24 hours.
What was the windiest day in Grimsby?
The windiest day measured in Grimsby between 1940 and 2025 was 3 January 1976, with winds reaching 69.9 km/h.
What is the warmest month in Grimsby?
The warmest month in Grimsby is July (16.3 °C on average); the coldest is January (4.0 °C).
How much does it rain in Grimsby?
Grimsby receives on average 634 mm of precipitation per year, spread over about 134 rainy days.
Is it sunny in Grimsby?
Grimsby gets on average 7.8 hours of sunshine per day, roughly 2,847 hours per year over 1940-2025.
What is the biggest single-day snowfall in Grimsby?
The heaviest 24-hour snowfall measured in Grimsby between 1940 and 2025 was 23 January 1984, with 12.9 cm.
Are there tropical nights in Grimsby?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Grimsby.
What was the most extreme apparent temperature in Grimsby?
In Grimsby, between 1940 and 2025, the highest apparent temperature reached 34.1 °C on 19 July 2022, and the lowest was -17.1 °C on 25 February 1947.
Compare Grimsby with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Grimsby