Wales has a temperate climate with warm summers and cold winters.
Wales has an average annual temperature of
10.4°C
across all 31 cities, with approximately
988 mm of annual precipitation
and average humidity of 87%.
Temperatures peak in July and drop to their lowest in January,
while rainfall is highest during winter months.
The warmest city is Caerphilly
with average July highs of 25°C,
while Ebbw Vale
is the coldest with average January lows of -4.6°C.
Humidity remains high throughout the year, especially during winter months, creating cold and damp conditions.
These seasonal patterns make summer pleasant for travel, while winters can bring frost and occasional snowfall.
Bangor is the wettest city in Wales with approximately 1195 mm of annual precipitation on average. View Bangor weather history →
What is the warmest month in Wales?▼
July is the warmest month in Wales, with nation-wide average highs of 23.7°C and average lows of 10.1°C.
What is the coldest month in Wales?▼
January is the coldest month in Wales with average lows of -1.3°C and average highs of 11°C.
What is the rainiest month in Wales?▼
December is the rainiest month in Wales with approximately 112 mm on average, while April is the driest with 63 mm.
How many cities in Wales have weather data?▼
TownPillar has historical weather data for 31 cities in Wales, covering 45 years of climate records from 1981 to 2025.
Which month has the most sunshine in Wales?▼
June is the sunniest month across Wales with an average solar radiation of 5.30 kWh/m²/day. This is useful for solar energy planning and understanding seasonal sunshine availability.
Where does this climate data come from?▼
All data is sourced from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis data. It includes monthly temperature, precipitation, humidity, wind speed, and solar radiation at 0.5° × 0.625° spatial resolution.
📚 Data Source
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources), a NASA project providing solar and meteorological data for renewable energy, building efficiency, and agricultural research.