Cavan climate — normals and trends
Cavan (Ireland) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.5 °C and it receives 870 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 (4.6 °C). Rainfall peaks in August.
Cavan averages 23 frost days, 0 hot days (≥ 30 °C) and 162 rainy days per year.
Cavan has warmed by +0.7 °C between 1940 and 2025, or +0.08 °C per decade. This trend is statistically significant.
The number of frost days there went from about 32 to 14 per year over the period.
The hottest day of the period reached 29.0 °C (on 12 July 2025) and the coldest -14.5 °C (on 12 January 1982).
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
CavanUlster
- coords
- 53.99°, -7.36°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.5°C
Average daily high
12.2°C
Average daily low
6.8°C
Annual rainfall
870mm
Sunshine / day
6.7h
Mean relative humidity
83%
Average peak wind
19.9km/h
Seasonal range
10.4°C
Frost days (< 0 °C)
23 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
162 d/yr
Annual snowfall
16.1 cm
Average feels-like high
9.5 °C
Average feels-like low
3.7 °C
Average peak gust
42.2 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.7 °C
since 1940
+0.1 °C per decade · r² = 0.16 · 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
29.0 °C
12 July 2025
Coldest day
-14.5 °C
12 January 1982
Wettest day
51 mm
6 September 2010
Windiest day
63.3 km/h
16 September 1961
Strongest gust
128.9 km/h
24 January 2025
Hottest feels-like
32.4 °C
29 July 1948
Coldest feels-like
-18.7 °C
12 January 1982
Snowiest day
17.6 cm
30 March 2010
Sunniest day
16.9 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 | -0.1 °C | 52 mm | -25 mm |
| Feb | 8.3 °C | +1.0 °C | 75 mm | +14 mm |
| Mar | 11.2 °C | +2.1 °C | 21 mm | -43 mm |
| Apr | 14.3 °C | +2.9 °C | 93 mm | +30 mm |
| May | 17.0 °C | +2.7 °C | 42 mm | -30 mm |
| Jun | 17.8 °C | +1.0 °C | 84 mm | +14 mm |
| Jul | 19.6 °C | +1.5 °C | 67 mm | -7 mm |
| Aug | 19.1 °C | +1.3 °C | 50 mm | -32 mm |
| Sep | 15.4 °C | -0.4 °C | 98 mm | +25 mm |
| Oct | 12.8 °C | +0.1 °C | 130 mm | +51 mm |
| Nov | 9.9 °C | +0.7 °C | 104 mm | +30 mm |
| Dec | 8.6 °C | +1.2 °C | 86 mm | +5 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 Cavan?
Cavan has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.5 °C and it receives 870 mm of precipitation per year.
What is the hottest day ever recorded in Cavan?
The hottest day measured in Cavan between 1940 and 2025 was 12 July 2025, reaching 29.0 °C.
What is the coldest day in Cavan?
The coldest day measured in Cavan between 1940 and 2025 was 12 January 1982, at -14.5 °C.
Does it snow in Cavan?
Yes. Cavan gets on average 16.1 cm of snow per year and has around 23 frost days.
Has the climate of Cavan warmed?
Yes: Cavan warmed by +0.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Cavan?
The wettest day measured in Cavan between 1940 and 2025 was 6 September 2010, with 51 mm of rain in 24 hours.
What was the windiest day in Cavan?
The windiest day measured in Cavan between 1940 and 2025 was 16 September 1961, with winds reaching 63.3 km/h.
What is the warmest month in Cavan?
The warmest month in Cavan is July (15.0 °C on average); the coldest is January (4.6 °C).
How much does it rain in Cavan?
Cavan receives on average 870 mm of precipitation per year, spread over about 162 rainy days.
Is it sunny in Cavan?
Cavan 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 Cavan?
The heaviest 24-hour snowfall measured in Cavan between 1940 and 2025 was 30 March 2010, with 17.6 cm.
Are there tropical nights in Cavan?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Cavan.
What was the most extreme apparent temperature in Cavan?
In Cavan, between 1940 and 2025, the highest apparent temperature reached 32.4 °C on 29 July 1948, and the lowest was -18.7 °C on 12 January 1982.
Compare Cavan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Cavan