Olney climate — normals and trends
Olney (United Kingdom) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.8 °C and it receives 623 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 (16.7 °C on average) and the coldest is January (3.7 °C). Rainfall peaks in May.
Olney averages 42 frost days, 1 hot days (≥ 30 °C) and 128 rainy days per year.
Olney 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 60 to 24 per year over the period.
The hottest day of the period reached 39.1 °C (on 19 July 2022) and the coldest -15.4 °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
OlneyEngland
- coords
- 52.15°, -0.70°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.8°C
Average daily high
13.1°C
Average daily low
6.4°C
Annual rainfall
623mm
Sunshine / day
7.3h
Mean relative humidity
80%
Average peak wind
22.0km/h
Seasonal range
13.0°C
Frost days (< 0 °C)
42 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
128 d/yr
Annual snowfall
17.5 cm
Average feels-like high
10.1 °C
Average feels-like low
3.2 °C
Average peak gust
41.4 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.46 · 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
39.1 °C
19 July 2022
Coldest day
-15.4 °C
23 January 1963
Wettest day
48 mm
14 November 2025
Windiest day
60.9 km/h
25 January 1990
Strongest gust
123.5 km/h
18 January 2007
Hottest feels-like
37.3 °C
28 July 1947
Coldest feels-like
-20.1 °C
13 December 1981
Snowiest day
17.2 cm
26 April 1981
Sunniest day
16.0 h
4 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 | 5.9 °C | -0.1 °C | 68 mm | +19 mm |
| Feb | 7.4 °C | +0.7 °C | 48 mm | +7 mm |
| Mar | 12.6 °C | +3.3 °C | 13 mm | -33 mm |
| Apr | 16.2 °C | +4.1 °C | 20 mm | -30 mm |
| May | 18.5 °C | +3.0 °C | 21 mm | -37 mm |
| Jun | 23.1 °C | +4.5 °C | 32 mm | -24 mm |
| Jul | 23.3 °C | +2.6 °C | 66 mm | +10 mm |
| Aug | 23.0 °C | +2.5 °C | 23 mm | -34 mm |
| Sep | 18.3 °C | +0.5 °C | 55 mm | +4 mm |
| Oct | 14.0 °C | +0.2 °C | 51 mm | -3 mm |
| Nov | 10.8 °C | +1.6 °C | 123 mm | +69 mm |
| Dec | 9.0 °C | +2.1 °C | 67 mm | +16 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 Olney?
Olney has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.8 °C and it receives 623 mm of precipitation per year.
What is the hottest day ever recorded in Olney?
The hottest day measured in Olney between 1940 and 2025 was 19 July 2022, reaching 39.1 °C.
What is the coldest day in Olney?
The coldest day measured in Olney between 1940 and 2025 was 23 January 1963, at -15.4 °C.
Does it snow in Olney?
Yes. Olney gets on average 17.5 cm of snow per year and has around 42 frost days.
Has the climate of Olney warmed?
Yes: Olney warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Olney?
The wettest day measured in Olney between 1940 and 2025 was 14 November 2025, with 48 mm of rain in 24 hours.
What was the windiest day in Olney?
The windiest day measured in Olney between 1940 and 2025 was 25 January 1990, with winds reaching 60.9 km/h.
What is the warmest month in Olney?
The warmest month in Olney is July (16.7 °C on average); the coldest is January (3.7 °C).
How much does it rain in Olney?
Olney receives on average 623 mm of precipitation per year, spread over about 128 rainy days.
Is it sunny in Olney?
Olney gets on average 7.3 hours of sunshine per day, roughly 2,665 hours per year over 1940-2025.
What is the biggest single-day snowfall in Olney?
The heaviest 24-hour snowfall measured in Olney between 1940 and 2025 was 26 April 1981, with 17.2 cm.
Are there tropical nights in Olney?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Olney.
What was the most extreme apparent temperature in Olney?
In Olney, between 1940 and 2025, the highest apparent temperature reached 37.3 °C on 28 July 1947, and the lowest was -20.1 °C on 13 December 1981.
Compare Olney with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Olney