Wales weather in September 2021

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Below are average maximum temperatures at popular destinations in Wales in September. Select a destination to see more weather parameters.

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The September weather guide for Wales shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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How hot is it in Wales in September?

Daytime temperatures usually reach 18°C in Cardiff, Wales in September, falling to 10°C at night.

How sunny is it in Wales in September?

There are normally 5 hours of bright sunshine each day in Cardiff, Wales in September - that's 37% of daylight hours.

How warm is the sea around Wales in September?

The average sea temperature around Cardiff, Wales in September is 17°C.

Does it rain in Wales in September?

There are usually 15 days with some rain in Cardiff, Wales in September and the average monthly rainfall is 91mm.

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

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Wales sunrise & sunset times for September 2021

Browse the sunrise and sunset times for Wales in September 2021. Select a month to view Wales sunrise & sunset times for the next 12 months. The Wales sunrise and sunset times shown below are for Cardiff.


Date Sunrise times Sunset times
Wednesday, 1st September 2021 06:26 19:59
Wednesday, 15th September 2021 06:48 19:27
Thursday, 30th September 2021 07:12 18:52
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