Dundalk climate — normals and trends
Dundalk (Ireland) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.5 °C and it receives 834 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 (15.1 °C on average) and the coldest is January (4.6 °C). Rainfall peaks in August.
Dundalk averages 25 frost days, 0 hot days (≥ 30 °C) and 156 rainy days per year.
Dundalk 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 35 to 15 per year over the period.
The hottest day of the period reached 28.4 °C (on 18 July 2022) and the coldest -13.7 °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
DundalkLeinster
- coords
- 54.00°, -6.42°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.5°C
Average daily high
12.3°C
Average daily low
6.7°C
Annual rainfall
834mm
Sunshine / day
7.1h
Mean relative humidity
83%
Average peak wind
20.6km/h
Seasonal range
10.5°C
Frost days (< 0 °C)
25 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
156 d/yr
Annual snowfall
15.8 cm
Average feels-like high
9.6 °C
Average feels-like low
3.6 °C
Average peak gust
43.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.21 · 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
28.4 °C
18 July 2022
Coldest day
-13.7 °C
12 January 1982
Wettest day
56 mm
6 September 2010
Windiest day
59.1 km/h
12 January 1974
Strongest gust
132.5 km/h
24 January 2025
Hottest feels-like
31.9 °C
13 July 1983
Coldest feels-like
-18.1 °C
12 January 1982
Snowiest day
15.0 cm
8 December 1954
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 | 6.8 °C | 0.0 °C | 55 mm | -18 mm |
| Feb | 8.4 °C | +1.1 °C | 63 mm | +6 mm |
| Mar | 11.1 °C | +2.0 °C | 19 mm | -42 mm |
| Apr | 13.9 °C | +2.5 °C | 105 mm | +44 mm |
| May | 16.6 °C | +2.4 °C | 51 mm | -21 mm |
| Jun | 18.0 °C | +1.1 °C | 93 mm | +25 mm |
| Jul | 19.6 °C | +1.3 °C | 81 mm | +9 mm |
| Aug | 19.3 °C | +1.3 °C | 47 mm | -33 mm |
| Sep | 15.7 °C | -0.2 °C | 105 mm | +35 mm |
| Oct | 12.9 °C | +0.1 °C | 106 mm | +30 mm |
| Nov | 10.1 °C | +0.8 °C | 101 mm | +31 mm |
| Dec | 8.8 °C | +1.3 °C | 86 mm | +11 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 Dundalk?
Dundalk has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.5 °C and it receives 834 mm of precipitation per year.
What is the hottest day ever recorded in Dundalk?
The hottest day measured in Dundalk between 1940 and 2025 was 18 July 2022, reaching 28.4 °C.
What is the coldest day in Dundalk?
The coldest day measured in Dundalk between 1940 and 2025 was 12 January 1982, at -13.7 °C.
Does it snow in Dundalk?
Yes. Dundalk gets on average 15.8 cm of snow per year and has around 25 frost days.
Has the climate of Dundalk warmed?
Yes: Dundalk warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Dundalk?
The wettest day measured in Dundalk between 1940 and 2025 was 6 September 2010, with 56 mm of rain in 24 hours.
What was the windiest day in Dundalk?
The windiest day measured in Dundalk between 1940 and 2025 was 12 January 1974, with winds reaching 59.1 km/h.
What is the warmest month in Dundalk?
The warmest month in Dundalk is July (15.1 °C on average); the coldest is January (4.6 °C).
How much does it rain in Dundalk?
Dundalk receives on average 834 mm of precipitation per year, spread over about 156 rainy days.
Is it sunny in Dundalk?
Dundalk gets on average 7.1 hours of sunshine per day, roughly 2,592 hours per year over 1940-2025.
What is the biggest single-day snowfall in Dundalk?
The heaviest 24-hour snowfall measured in Dundalk between 1940 and 2025 was 8 December 1954, with 15.0 cm.
Are there tropical nights in Dundalk?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Dundalk.
What was the most extreme apparent temperature in Dundalk?
In Dundalk, between 1940 and 2025, the highest apparent temperature reached 31.9 °C on 13 July 1983, and the lowest was -18.1 °C on 12 January 1982.
Compare Dundalk with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Dundalk