Cardiff weather

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The weather guide for Cardiff, Wales shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by MeteoBlue. Find out more about our data sources.

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Find holiday rentals in Cardiff, Wales including holiday homes, self-catering accommodation, B&Bs, shared space, home swaps and short-term lets.

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Need to hire a car for Cardiff, Wales? Check out the car hire companies and brokers offering car rentals for Cardiff, Wales.

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Which is the hottest month in Cardiff?

The hottest time of year in Cardiff is normally July. Expect maximum daytime temperatures to reach 20°C.

Which month has the most rain in Cardiff?

In terms of rainfall, December is usually the wettest month in Cardiff with 109mm on average. There are normally 19 days in December with some rain.

When is it sunniest in Cardiff?

The sunniest time of year in Cardiff is normally August with bright sunshine on average for 41% of daylight hours; that's 6 hours of sunshine per day.

When is the sea warmest in Cardiff?

The sea is usually at its warmest in Cardiff in August when the water temperature reaches 18°C.

Metric (°C / mm)  |  Imperial (°F / inches)

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Compare Cardiff weather with the USA

Below the Cardiff weather chart shows average maximum daytime temperature for Cardiff, Wales, UK and the USA (Washington).

Maximum daytime temperature (°C)

Cardiff, Wales, UK
USA (Washington)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

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Where's warm in Wales right now?

Below are the temperatures expected today at popular destinations in Wales. Select a destination to compare today's forecast with average weather conditions.

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