Thetford climate — normals and trends
Thetford (United Kingdom) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.9 °C and it receives 627 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 (16.8 °C on average) and the coldest is January (3.8 °C). Rainfall peaks in August.
Thetford averages 38 frost days, 0 hot days (≥ 30 °C) and 130 rainy days per year.
Thetford 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 56 to 20 per year over the period.
The hottest day of the period reached 36.2 °C (on 19 July 2022) and the coldest -17.9 °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
ThetfordEngland
- coords
- 52.42°, 0.75°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.9°C
Average daily high
13.2°C
Average daily low
6.7°C
Annual rainfall
627mm
Sunshine / day
7.8h
Mean relative humidity
80%
Average peak wind
21.2km/h
Seasonal range
13.0°C
Frost days (< 0 °C)
38 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
130 d/yr
Annual snowfall
13.4 cm
Average feels-like high
10.4 °C
Average feels-like low
3.6 °C
Average peak gust
42.0 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.46 · 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
36.2 °C
19 July 2022
Coldest day
-17.9 °C
23 January 1963
Wettest day
42 mm
3 September 1965
Windiest day
63.5 km/h
16 October 1987
Strongest gust
130.3 km/h
9 February 2020
Hottest feels-like
36.2 °C
25 July 2019
Coldest feels-like
-22.3 °C
23 January 1963
Snowiest day
8.9 cm
23 January 1984
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 | 6.1 °C | 0.0 °C | 53 mm | +4 mm |
| Feb | 7.3 °C | +0.6 °C | 46 mm | +5 mm |
| Mar | 12.4 °C | +3.1 °C | 10 mm | -37 mm |
| Apr | 15.6 °C | +3.5 °C | 14 mm | -34 mm |
| May | 17.6 °C | +2.2 °C | 34 mm | -24 mm |
| Jun | 22.9 °C | +4.4 °C | 33 mm | -23 mm |
| Jul | 22.7 °C | +2.0 °C | 77 mm | +19 mm |
| Aug | 22.1 °C | +1.6 °C | 28 mm | -34 mm |
| Sep | 18.7 °C | +0.7 °C | 40 mm | -12 mm |
| Oct | 14.3 °C | +0.2 °C | 68 mm | +14 mm |
| Nov | 11.1 °C | +1.6 °C | 98 mm | +45 mm |
| Dec | 9.3 °C | +2.2 °C | 40 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 Thetford?
Thetford has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.9 °C and it receives 627 mm of precipitation per year.
What is the hottest day ever recorded in Thetford?
The hottest day measured in Thetford between 1940 and 2025 was 19 July 2022, reaching 36.2 °C.
What is the coldest day in Thetford?
The coldest day measured in Thetford between 1940 and 2025 was 23 January 1963, at -17.9 °C.
Does it snow in Thetford?
Yes. Thetford gets on average 13.4 cm of snow per year and has around 38 frost days.
Has the climate of Thetford warmed?
Yes: Thetford warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Thetford?
The wettest day measured in Thetford between 1940 and 2025 was 3 September 1965, with 42 mm of rain in 24 hours.
What was the windiest day in Thetford?
The windiest day measured in Thetford between 1940 and 2025 was 16 October 1987, with winds reaching 63.5 km/h.
What is the warmest month in Thetford?
The warmest month in Thetford is July (16.8 °C on average); the coldest is January (3.8 °C).
How much does it rain in Thetford?
Thetford receives on average 627 mm of precipitation per year, spread over about 130 rainy days.
Is it sunny in Thetford?
Thetford 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 Thetford?
The heaviest 24-hour snowfall measured in Thetford between 1940 and 2025 was 23 January 1984, with 8.9 cm.
Are there tropical nights in Thetford?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Thetford.
What was the most extreme apparent temperature in Thetford?
In Thetford, between 1940 and 2025, the highest apparent temperature reached 36.2 °C on 25 July 2019, and the lowest was -22.3 °C on 23 January 1963.
Compare Thetford with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Thetford