Antrim climate — normals and trends
Antrim (United Kingdom) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.4 °C and it receives 856 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 (14.8 °C on average) and the coldest is January (4.5 °C). Rainfall peaks in August.
Antrim averages 23 frost days, 0 hot days (≥ 30 °C) and 169 rainy days per year.
Antrim 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 33 to 13 per year over the period.
The hottest day of the period reached 27.4 °C (on 29 June 1995) and the coldest -14.3 °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
AntrimNorthern Ireland
- coords
- 54.72°, -6.21°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.4°C
Average daily high
12.1°C
Average daily low
6.7°C
Annual rainfall
856mm
Sunshine / day
7.5h
Mean relative humidity
83%
Average peak wind
20.7km/h
Seasonal range
10.3°C
Frost days (< 0 °C)
23 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
169 d/yr
Annual snowfall
18.4 cm
Average feels-like high
9.3 °C
Average feels-like low
3.6 °C
Average peak gust
44.5 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.6 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
27.4 °C
29 June 1995
Coldest day
-14.3 °C
1 March 1947
Wettest day
43 mm
3 June 2007
Windiest day
59.3 km/h
16 September 1961
Strongest gust
130.0 km/h
23 May 2011
Hottest feels-like
29.8 °C
29 June 1995
Coldest feels-like
-19.3 °C
1 March 1947
Snowiest day
24.4 cm
22 March 2013
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 | 40 mm | -33 mm |
| Feb | 8.2 °C | +1.1 °C | 51 mm | -8 mm |
| Mar | 11.1 °C | +2.2 °C | 21 mm | -42 mm |
| Apr | 14.1 °C | +2.9 °C | 74 mm | +11 mm |
| May | 16.7 °C | +2.7 °C | 57 mm | -15 mm |
| Jun | 17.5 °C | +0.9 °C | 110 mm | +39 mm |
| Jul | 19.1 °C | +1.2 °C | 91 mm | +13 mm |
| Aug | 19.3 °C | +1.6 °C | 51 mm | -32 mm |
| Sep | 15.6 °C | -0.1 °C | 114 mm | +41 mm |
| Oct | 12.8 °C | +0.1 °C | 111 mm | +33 mm |
| Nov | 10.0 °C | +0.8 °C | 111 mm | +41 mm |
| Dec | 8.5 °C | +1.1 °C | 86 mm | +12 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 Antrim?
Antrim has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.4 °C and it receives 856 mm of precipitation per year.
What is the hottest day ever recorded in Antrim?
The hottest day measured in Antrim between 1940 and 2025 was 29 June 1995, reaching 27.4 °C.
What is the coldest day in Antrim?
The coldest day measured in Antrim between 1940 and 2025 was 1 March 1947, at -14.3 °C.
Does it snow in Antrim?
Yes. Antrim gets on average 18.4 cm of snow per year and has around 23 frost days.
Has the climate of Antrim warmed?
Yes: Antrim warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Antrim?
The wettest day measured in Antrim between 1940 and 2025 was 3 June 2007, with 43 mm of rain in 24 hours.
What was the windiest day in Antrim?
The windiest day measured in Antrim between 1940 and 2025 was 16 September 1961, with winds reaching 59.3 km/h.
What is the warmest month in Antrim?
The warmest month in Antrim is July (14.8 °C on average); the coldest is January (4.5 °C).
How much does it rain in Antrim?
Antrim receives on average 856 mm of precipitation per year, spread over about 169 rainy days.
Is it sunny in Antrim?
Antrim gets on average 7.5 hours of sunshine per day, roughly 2,738 hours per year over 1940-2025.
What is the biggest single-day snowfall in Antrim?
The heaviest 24-hour snowfall measured in Antrim between 1940 and 2025 was 22 March 2013, with 24.4 cm.
Are there tropical nights in Antrim?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Antrim.
What was the most extreme apparent temperature in Antrim?
In Antrim, between 1940 and 2025, the highest apparent temperature reached 29.8 °C on 29 June 1995, and the lowest was -19.3 °C on 1 March 1947.
Compare Antrim with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Antrim