Cornwall weather in March 2025

Expect 10°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Cornwall in March. Check more long-term weather averages for Cornwall in March before you book your next holiday to Cornwall in 2025/2026.

10
10°C max day temperature
4
4 hours of sunshine per day
18
18 days with some rainfall
4
4°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
88
88 mm of monthly rainfall
3
3 (Moderate) UV index
9
9°C sea temperature

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Places to visit

Destination

The March 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 destinations in Cornwall in March. Select a destination to see more weather parameters.

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

More about the UK

How warm is it in Cornwall in March?

Daytime temperatures usually reach 10°C in Newquay, Cornwall in March, falling to 4°C at night.

How sunny is it in Cornwall in March?

There are normally 4 hours of bright sunshine each day in Newquay, Cornwall in March - that's 34% of daylight hours.

Is the sea cold around Cornwall in March?

The average sea temperature around Newquay, Cornwall in March is 9°C.

Does it rain in Cornwall in March?

There are usually 18 days with some rain in Newquay, Cornwall in March and the average monthly rainfall is 88mm.

Cornwall March sunrise & sunset times

Browse the sunrise and sunset times for Cornwall in March 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.

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