Haverfordwest climate — normals and trends
Haverfordwest (United Kingdom) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.8 °C and it receives 942 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 August (15.8 °C on average) and the coldest is February (6.3 °C). Rainfall peaks in November.
Haverfordwest averages 5 frost days, 0 hot days (≥ 30 °C) and 161 rainy days per year.
Haverfordwest has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.
The number of frost days there went from about 9 to 1 per year over the period.
The hottest day of the period reached 27.3 °C (on 3 August 1995) and the coldest -6.6 °C (on 21 January 1940).
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
HaverfordwestWales
- coords
- 51.80°, -4.97°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.8°C
Average daily high
12.4°C
Average daily low
9.1°C
Annual rainfall
942mm
Sunshine / day
8.4h
Mean relative humidity
82%
Average peak wind
29.1km/h
Seasonal range
9.5°C
Frost days (< 0 °C)
5 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
161 d/yr
Annual snowfall
5.1 cm
Average feels-like high
9.4 °C
Average feels-like low
5.1 °C
Average peak gust
48.0 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
12.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.32 · 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
27.3 °C
3 August 1995
Coldest day
-6.6 °C
21 January 1940
Wettest day
59 mm
20 October 1944
Windiest day
97.5 km/h
30 November 1954
Strongest gust
148.7 km/h
25 January 1990
Hottest feels-like
29.6 °C
29 June 1976
Coldest feels-like
-14.1 °C
12 January 1987
Snowiest day
15.2 cm
8 January 1982
Sunniest day
16.1 h
18 June 2025
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 | 8.3 °C | +0.2 °C | 120 mm | +24 mm |
| Feb | 8.4 °C | +0.6 °C | 83 mm | +12 mm |
| Mar | 10.6 °C | +1.7 °C | 21 mm | -49 mm |
| Apr | 13.4 °C | +2.7 °C | 113 mm | +56 mm |
| May | 15.4 °C | +2.2 °C | 38 mm | -23 mm |
| Jun | 16.9 °C | +1.3 °C | 83 mm | +26 mm |
| Jul | 18.7 °C | +1.4 °C | 52 mm | -8 mm |
| Aug | 19.4 °C | +1.9 °C | 52 mm | -21 mm |
| Sep | 16.4 °C | +0.2 °C | 161 mm | +80 mm |
| Oct | 14.1 °C | +0.4 °C | 136 mm | +32 mm |
| Nov | 12.1 °C | +1.2 °C | 210 mm | +103 mm |
| Dec | 10.1 °C | +0.9 °C | 197 mm | +91 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 Haverfordwest?
Haverfordwest has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.8 °C and it receives 942 mm of precipitation per year.
What is the hottest day ever recorded in Haverfordwest?
The hottest day measured in Haverfordwest between 1940 and 2025 was 3 August 1995, reaching 27.3 °C.
What is the coldest day in Haverfordwest?
The coldest day measured in Haverfordwest between 1940 and 2025 was 21 January 1940, at -6.6 °C.
Does it snow in Haverfordwest?
Yes. Haverfordwest gets on average 5.1 cm of snow per year and has around 5 frost days.
Has the climate of Haverfordwest warmed?
Yes: Haverfordwest warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Haverfordwest?
The wettest day measured in Haverfordwest between 1940 and 2025 was 20 October 1944, with 59 mm of rain in 24 hours.
What was the windiest day in Haverfordwest?
The windiest day measured in Haverfordwest between 1940 and 2025 was 30 November 1954, with winds reaching 97.5 km/h.
What is the warmest month in Haverfordwest?
The warmest month in Haverfordwest is August (15.8 °C on average); the coldest is February (6.3 °C).
How much does it rain in Haverfordwest?
Haverfordwest receives on average 942 mm of precipitation per year, spread over about 161 rainy days.
Is it sunny in Haverfordwest?
Haverfordwest gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Haverfordwest?
The heaviest 24-hour snowfall measured in Haverfordwest between 1940 and 2025 was 8 January 1982, with 15.2 cm.
Are there tropical nights in Haverfordwest?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Haverfordwest.
What was the most extreme apparent temperature in Haverfordwest?
In Haverfordwest, between 1940 and 2025, the highest apparent temperature reached 29.6 °C on 29 June 1976, and the lowest was -14.1 °C on 12 January 1987.
Compare Haverfordwest with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Haverfordwest