Westport climate — normals and trends
Westport (Ireland) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.6 °C and it receives 1,168 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 (14.4 °C on average) and the coldest is January (5.1 °C). Rainfall peaks in December.
Westport averages 21 frost days, 0 hot days (≥ 30 °C) and 196 rainy days per year.
Westport has warmed by +0.4 °C between 1940 and 2025, or +0.05 °C per decade. This trend is statistically significant.
The number of frost days there went from about 26 to 16 per year over the period.
The hottest day of the period reached 28.6 °C (on 30 June 1976) and the coldest -11.3 °C (on 25 December 2010).
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
WestportConnacht
- coords
- 53.80°, -9.52°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.6°C
Average daily high
12.2°C
Average daily low
6.9°C
Annual rainfall
1,168mm
Sunshine / day
7.5h
Mean relative humidity
84%
Average peak wind
22.4km/h
Seasonal range
9.3°C
Frost days (< 0 °C)
21 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
196 d/yr
Annual snowfall
12.1 cm
Average feels-like high
9.4 °C
Average feels-like low
3.8 °C
Average peak gust
48.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.4 °C
since 1940
+0.1 °C per decade · r² = 0.06 · p = 0.023
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
28.6 °C
30 June 1976
Coldest day
-11.3 °C
25 December 2010
Wettest day
65 mm
27 October 1989
Windiest day
75.6 km/h
26 December 1998
Strongest gust
156.6 km/h
26 December 1998
Hottest feels-like
32.2 °C
29 July 1948
Coldest feels-like
-15.6 °C
25 December 2010
Snowiest day
14.8 cm
16 November 1965
Sunniest day
16.7 h
18 June 2019
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 | 7.4 °C | +0.1 °C | 69 mm | -41 mm |
| Feb | 8.5 °C | +0.8 °C | 143 mm | +54 mm |
| Mar | 11.3 °C | +1.9 °C | 41 mm | -47 mm |
| Apr | 14.6 °C | +3.1 °C | 94 mm | +18 mm |
| May | 17.1 °C | +3.1 °C | 66 mm | -24 mm |
| Jun | 16.6 °C | +0.6 °C | 114 mm | +33 mm |
| Jul | 18.2 °C | +1.0 °C | 82 mm | -4 mm |
| Aug | 18.8 °C | +1.6 °C | 113 mm | +13 mm |
| Sep | 15.0 °C | -0.6 °C | 163 mm | +65 mm |
| Oct | 12.8 °C | 0.0 °C | 124 mm | +8 mm |
| Nov | 10.3 °C | +0.7 °C | 142 mm | +30 mm |
| Dec | 8.5 °C | +0.5 °C | 150 mm | +28 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 Westport?
Westport has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.6 °C and it receives 1,168 mm of precipitation per year.
What is the hottest day ever recorded in Westport?
The hottest day measured in Westport between 1940 and 2025 was 30 June 1976, reaching 28.6 °C.
What is the coldest day in Westport?
The coldest day measured in Westport between 1940 and 2025 was 25 December 2010, at -11.3 °C.
Does it snow in Westport?
Yes. Westport gets on average 12.1 cm of snow per year and has around 21 frost days.
Has the climate of Westport warmed?
Yes: Westport warmed by +0.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Westport?
The wettest day measured in Westport between 1940 and 2025 was 27 October 1989, with 65 mm of rain in 24 hours.
What was the windiest day in Westport?
The windiest day measured in Westport between 1940 and 2025 was 26 December 1998, with winds reaching 75.6 km/h.
What is the warmest month in Westport?
The warmest month in Westport is July (14.4 °C on average); the coldest is January (5.1 °C).
How much does it rain in Westport?
Westport receives on average 1,168 mm of precipitation per year, spread over about 196 rainy days.
Is it sunny in Westport?
Westport 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 Westport?
The heaviest 24-hour snowfall measured in Westport between 1940 and 2025 was 16 November 1965, with 14.8 cm.
Are there tropical nights in Westport?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Westport.
What was the most extreme apparent temperature in Westport?
In Westport, between 1940 and 2025, the highest apparent temperature reached 32.2 °C on 29 July 1948, and the lowest was -15.6 °C on 25 December 2010.
Compare Westport with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Westport