Cornwall weather in December 2025

Q: How warm is it in Cornwall in December?

Daytime temperatures usually reach 10°C in Newquay, Cornwall in December, falling to 5°C at night.

Q: How sunny is it in Cornwall in December?

There are normally 2 hours of bright sunshine each day in Newquay, Cornwall in December - that's 21% of daylight hours.

Q: Is the sea cold around Cornwall in December?

The average sea temperature around Newquay, Cornwall in December is 11°C.

Q: Does it rain in Cornwall in December?

There are usually 21 days with some rain in Newquay, Cornwall in December and the average monthly rainfall is 123mm.

Expect 10°C daytime maximum temperatures in the shade with on average 2 hours of sunshine per day in Cornwall in December. Check more long-term weather averages for Cornwall in December before you book your next holiday to Cornwall in 2025/2026.

10
10°C max day temperature
2
2 hours of sunshine per day
21
21 days with some rainfall
5
5°C min night temperature
8
8 hours of daylight per day
0
No heat & humidity
123
123 mm of monthly rainfall
1
1 (Low) UV index
11
11°C sea temperature

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The December weather guide for Cornwall (Newquay) 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.

Top Cornwall destinations

Below are average maximum temperatures at popular countries, regions and places in Cornwall in December. Select a holiday destination to see more weather parameters.

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

More about the UK

How warm is it in Cornwall in December?

Daytime temperatures usually reach 10°C in Newquay, Cornwall in December, falling to 5°C at night.

How sunny is it in Cornwall in December?

There are normally 2 hours of bright sunshine each day in Newquay, Cornwall in December - that's 21% of daylight hours.

Is the sea cold around Cornwall in December?

The average sea temperature around Newquay, Cornwall in December is 11°C.

Does it rain in Cornwall in December?

There are usually 21 days with some rain in Newquay, Cornwall in December and the average monthly rainfall is 123mm.

Cornwall December sunrise & sunset times

Browse the sunrise and sunset times for Cornwall in December 2025. Select a month to view Cornwall sunrise and sunset times for the next 12 months. The Cornwall sunrise and sunset times shown below are for Newquay.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec