Ballymoney climate — normals and trends
Ballymoney (United Kingdom) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.2 °C and it receives 1,013 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 (14.1 °C on average) and the coldest is January (4.7 °C). Rainfall peaks in August.
Ballymoney averages 16 frost days, 0 hot days (≥ 30 °C) and 191 rainy days per year.
Ballymoney has warmed by +1.0 °C between 1940 and 2025, or +0.12 °C per decade. This trend is statistically significant.
The number of frost days there went from about 25 to 7 per year over the period.
The hottest day of the period reached 25.3 °C (on 12 July 2025) and the coldest -12.6 °C (on 1 March 1947).
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
BallymoneyNorthern Ireland
- coords
- 55.07°, -6.51°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.2°C
Average daily high
11.5°C
Average daily low
6.8°C
Annual rainfall
1,013mm
Sunshine / day
7.4h
Mean relative humidity
83%
Average peak wind
24.0km/h
Seasonal range
9.4°C
Frost days (< 0 °C)
16 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
191 d/yr
Annual snowfall
21.3 cm
Average feels-like high
8.5 °C
Average feels-like low
3.2 °C
Average peak gust
45.6 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.0 °C
since 1940
+0.1 °C per decade · r² = 0.28 · 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
25.3 °C
12 July 2025
Coldest day
-12.6 °C
1 March 1947
Wettest day
48 mm
30 March 2010
Windiest day
65.4 km/h
4 February 1957
Strongest gust
129.6 km/h
17 December 1952
Hottest feels-like
27.7 °C
29 June 1995
Coldest feels-like
-17.6 °C
1 March 1947
Snowiest day
22.8 cm
30 March 2010
Sunniest day
17.0 h
19 June 1941
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 | 6.9 °C | +0.3 °C | 58 mm | -27 mm |
| Feb | 8.0 °C | +1.0 °C | 60 mm | -8 mm |
| Mar | 10.5 °C | +2.0 °C | 31 mm | -42 mm |
| Apr | 13.4 °C | +3.0 °C | 87 mm | +13 mm |
| May | 15.3 °C | +2.3 °C | 65 mm | -15 mm |
| Jun | 16.5 °C | +1.1 °C | 121 mm | +41 mm |
| Jul | 17.9 °C | +1.2 °C | 100 mm | +7 mm |
| Aug | 18.5 °C | +1.7 °C | 60 mm | -36 mm |
| Sep | 15.2 °C | +0.1 °C | 117 mm | +28 mm |
| Oct | 12.6 °C | +0.2 °C | 129 mm | +35 mm |
| Nov | 10.0 °C | +0.9 °C | 131 mm | +43 mm |
| Dec | 8.5 °C | +1.1 °C | 87 mm | -3 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 Ballymoney?
Ballymoney has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.2 °C and it receives 1,013 mm of precipitation per year.
What is the hottest day ever recorded in Ballymoney?
The hottest day measured in Ballymoney between 1940 and 2025 was 12 July 2025, reaching 25.3 °C.
What is the coldest day in Ballymoney?
The coldest day measured in Ballymoney between 1940 and 2025 was 1 March 1947, at -12.6 °C.
Does it snow in Ballymoney?
Yes. Ballymoney gets on average 21.3 cm of snow per year and has around 16 frost days.
Has the climate of Ballymoney warmed?
Yes: Ballymoney warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ballymoney?
The wettest day measured in Ballymoney between 1940 and 2025 was 30 March 2010, with 48 mm of rain in 24 hours.
What was the windiest day in Ballymoney?
The windiest day measured in Ballymoney between 1940 and 2025 was 4 February 1957, with winds reaching 65.4 km/h.
What is the warmest month in Ballymoney?
The warmest month in Ballymoney is July (14.1 °C on average); the coldest is January (4.7 °C).
How much does it rain in Ballymoney?
Ballymoney receives on average 1,013 mm of precipitation per year, spread over about 191 rainy days.
Is it sunny in Ballymoney?
Ballymoney gets on average 7.4 hours of sunshine per day, roughly 2,701 hours per year over 1940-2025.
What is the biggest single-day snowfall in Ballymoney?
The heaviest 24-hour snowfall measured in Ballymoney between 1940 and 2025 was 30 March 2010, with 22.8 cm.
Are there tropical nights in Ballymoney?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Ballymoney.
What was the most extreme apparent temperature in Ballymoney?
In Ballymoney, between 1940 and 2025, the highest apparent temperature reached 27.7 °C on 29 June 1995, and the lowest was -17.6 °C on 1 March 1947.
Compare Ballymoney with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ballymoney