Wales climate
World Climates covers 4 places in Wales. By annual mean temperature, the warmest is Swansea (11 °C52 °F) and the coolest is Valley (11 °C52 °F). The wettest is Valley with 1,123 mm44 in of precipitation per year, the driest Cardiff with 967 mm38 in.
The most common climate types (Köppen classification computed from these averages) are temperate oceanic (Cfb, 4 places).
The highest monthly average high is in Newport (21 °C69 °F in July); the lowest monthly average low is in Cardiff (3 °C38 °F in February).
Across the places in Wales, the months that most often rank as the most comfortable are June, July and August (4, 4 and 4 of 4 places respectively).
Frequently asked questions
Which is the warmest place in Wales?
By annual mean temperature, the warmest place in Wales is Swansea at 11 °C52 °F. The coolest is Valley at 11 °C52 °F.
Where does it rain the most in Wales?
Valley gets the most precipitation, 1,123 mm44 in in an average year. The driest place is Cardiff with 967 mm38 in.
How many places in Wales does this site cover?
World Climates has climate data for 4 places in Wales. Each one has a page with monthly averages for temperature, rainfall, humidity and daylight.
When is the best time to visit Wales?
It depends on the place. Across Wales, the months that most often rank as the most comfortable are June, July and August. Check the page of each city for its own best months.
Climate of every place in Wales
| Place | Year | Max high | Min low | Precip. |
|---|---|---|---|---|
| Cardiff | 11 | 21 | 3 | 967 |
| Swansea | 11 | 19 | 4 | 1,105 |
| Newport | 11 | 21 | 3 | 967 |
| Valley | 11 | 17 | 5 | 1,123 |
Year = annual mean temperature; max high = average high of the warmest month; min low = average low of the coldest month; precip. = annual total. Temperatures in °C°F, precipitation in mminches. Sorted by population.
Data: NASA POWER climatology 2001–2025 (MERRA-2 reanalysis, CERES satellite data) — grid-cell averages, not station records. Sources and method.