Monaghan climate — normals and trends
Monaghan (Ireland) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.2 °C and it receives 894 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 (4.4 °C). Rainfall peaks in August.
Monaghan averages 31 frost days, 0 hot days (≥ 30 °C) and 167 rainy days per year.
Monaghan has warmed by +0.8 °C between 1940 and 2025, or +0.09 °C per decade. This trend is statistically significant.
The number of frost days there went from about 41 to 21 per year over the period.
The hottest day of the period reached 28.8 °C (on 18 July 2022) and the coldest -13.4 °C (on 1 January 1979).
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
MonaghanUlster
- coords
- 54.25°, -6.97°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.2°C
Average daily high
12.2°C
Average daily low
6.4°C
Annual rainfall
894mm
Sunshine / day
6.6h
Mean relative humidity
83%
Average peak wind
19.6km/h
Seasonal range
10.4°C
Frost days (< 0 °C)
31 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
167 d/yr
Annual snowfall
19.1 cm
Average feels-like high
9.5 °C
Average feels-like low
3.4 °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
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.19 · 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
28.8 °C
18 July 2022
Coldest day
-13.4 °C
1 January 1979
Wettest day
54 mm
6 September 2010
Windiest day
62.4 km/h
16 September 1961
Strongest gust
127.4 km/h
26 December 1998
Hottest feels-like
32.1 °C
29 July 1948
Coldest feels-like
-18.5 °C
1 January 1979
Snowiest day
18.7 cm
30 March 2010
Sunniest day
16.9 h
19 June 2024
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 | 6.6 °C | 0.0 °C | 46 mm | -31 mm |
| Feb | 8.2 °C | +1.0 °C | 72 mm | +10 mm |
| Mar | 11.1 °C | +2.1 °C | 23 mm | -43 mm |
| Apr | 14.2 °C | +2.9 °C | 99 mm | +33 mm |
| May | 17.0 °C | +2.7 °C | 52 mm | -23 mm |
| Jun | 17.7 °C | +0.9 °C | 100 mm | +28 mm |
| Jul | 19.4 °C | +1.3 °C | 78 mm | +1 mm |
| Aug | 19.2 °C | +1.4 °C | 53 mm | -32 mm |
| Sep | 15.3 °C | -0.4 °C | 108 mm | +31 mm |
| Oct | 12.6 °C | 0.0 °C | 126 mm | +45 mm |
| Nov | 9.8 °C | +0.7 °C | 107 mm | +32 mm |
| Dec | 8.5 °C | +1.2 °C | 88 mm | +7 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 Monaghan?
Monaghan has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.2 °C and it receives 894 mm of precipitation per year.
What is the hottest day ever recorded in Monaghan?
The hottest day measured in Monaghan between 1940 and 2025 was 18 July 2022, reaching 28.8 °C.
What is the coldest day in Monaghan?
The coldest day measured in Monaghan between 1940 and 2025 was 1 January 1979, at -13.4 °C.
Does it snow in Monaghan?
Yes. Monaghan gets on average 19.1 cm of snow per year and has around 31 frost days.
Has the climate of Monaghan warmed?
Yes: Monaghan warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Monaghan?
The wettest day measured in Monaghan between 1940 and 2025 was 6 September 2010, with 54 mm of rain in 24 hours.
What was the windiest day in Monaghan?
The windiest day measured in Monaghan between 1940 and 2025 was 16 September 1961, with winds reaching 62.4 km/h.
What is the warmest month in Monaghan?
The warmest month in Monaghan is July (14.8 °C on average); the coldest is January (4.4 °C).
How much does it rain in Monaghan?
Monaghan receives on average 894 mm of precipitation per year, spread over about 167 rainy days.
Is it sunny in Monaghan?
Monaghan gets on average 6.6 hours of sunshine per day, roughly 2,409 hours per year over 1940-2025.
What is the biggest single-day snowfall in Monaghan?
The heaviest 24-hour snowfall measured in Monaghan between 1940 and 2025 was 30 March 2010, with 18.7 cm.
Are there tropical nights in Monaghan?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Monaghan.
What was the most extreme apparent temperature in Monaghan?
In Monaghan, between 1940 and 2025, the highest apparent temperature reached 32.1 °C on 29 July 1948, and the lowest was -18.5 °C on 1 January 1979.
Compare Monaghan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Monaghan