Armagh climate — normals and trends
Armagh (United Kingdom) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.4 °C and it receives 858 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 (15.0 °C on average) and the coldest is January (4.5 °C). Rainfall peaks in August.
Armagh averages 28 frost days, 0 hot days (≥ 30 °C) and 163 rainy days per year.
Armagh has warmed by +0.8 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The number of frost days there went from about 38 to 18 per year over the period.
The hottest day of the period reached 29.1 °C (on 18 July 2022) and the coldest -13.1 °C (on 19 January 1955).
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
ArmaghNorthern Ireland
- coords
- 54.35°, -6.67°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.4°C
Average daily high
12.3°C
Average daily low
6.5°C
Annual rainfall
858mm
Sunshine / day
6.7h
Mean relative humidity
83%
Average peak wind
19.7km/h
Seasonal range
10.5°C
Frost days (< 0 °C)
28 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
163 d/yr
Annual snowfall
17.8 cm
Average feels-like high
9.6 °C
Average feels-like low
3.6 °C
Average peak gust
42.1 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.20 · 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
29.1 °C
18 July 2022
Coldest day
-13.1 °C
19 January 1955
Wettest day
53 mm
6 September 2010
Windiest day
60.9 km/h
16 September 1961
Strongest gust
127.1 km/h
26 December 1998
Hottest feels-like
31.6 °C
29 July 1948
Coldest feels-like
-18.1 °C
1 January 1979
Snowiest day
16.7 cm
22 March 2013
Sunniest day
17.0 h
19 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 | 6.7 °C | 0.0 °C | 45 mm | -29 mm |
| Feb | 8.3 °C | +1.0 °C | 66 mm | +6 mm |
| Mar | 11.2 °C | +2.1 °C | 21 mm | -42 mm |
| Apr | 14.3 °C | +2.9 °C | 97 mm | +34 mm |
| May | 17.0 °C | +2.6 °C | 48 mm | -25 mm |
| Jun | 17.9 °C | +0.9 °C | 99 mm | +29 mm |
| Jul | 19.5 °C | +1.3 °C | 80 mm | +5 mm |
| Aug | 19.3 °C | +1.4 °C | 50 mm | -31 mm |
| Sep | 15.5 °C | -0.3 °C | 104 mm | +30 mm |
| Oct | 12.8 °C | +0.1 °C | 113 mm | +35 mm |
| Nov | 9.9 °C | +0.7 °C | 101 mm | +31 mm |
| Dec | 8.6 °C | +1.2 °C | 87 mm | +10 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 Armagh?
Armagh has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.4 °C and it receives 858 mm of precipitation per year.
What is the hottest day ever recorded in Armagh?
The hottest day measured in Armagh between 1940 and 2025 was 18 July 2022, reaching 29.1 °C.
What is the coldest day in Armagh?
The coldest day measured in Armagh between 1940 and 2025 was 19 January 1955, at -13.1 °C.
Does it snow in Armagh?
Yes. Armagh gets on average 17.8 cm of snow per year and has around 28 frost days.
Has the climate of Armagh warmed?
Yes: Armagh warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Armagh?
The wettest day measured in Armagh between 1940 and 2025 was 6 September 2010, with 53 mm of rain in 24 hours.
What was the windiest day in Armagh?
The windiest day measured in Armagh between 1940 and 2025 was 16 September 1961, with winds reaching 60.9 km/h.
What is the warmest month in Armagh?
The warmest month in Armagh is July (15.0 °C on average); the coldest is January (4.5 °C).
How much does it rain in Armagh?
Armagh receives on average 858 mm of precipitation per year, spread over about 163 rainy days.
Is it sunny in Armagh?
Armagh gets on average 6.7 hours of sunshine per day, roughly 2,446 hours per year over 1940-2025.
What is the biggest single-day snowfall in Armagh?
The heaviest 24-hour snowfall measured in Armagh between 1940 and 2025 was 22 March 2013, with 16.7 cm.
Are there tropical nights in Armagh?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Armagh.
What was the most extreme apparent temperature in Armagh?
In Armagh, between 1940 and 2025, the highest apparent temperature reached 31.6 °C on 29 July 1948, and the lowest was -18.1 °C on 1 January 1979.
Compare Armagh with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Armagh