St Helena & Islands weather in December 2025

Q: How hot is it in St Helena & Islands in December?

Daytime temperatures usually reach 20°C in St Helena, St Helena & Islands in December, falling to 16°C at night.

Q: How warm is the sea around St Helena & Islands in December?

The average sea temperature around St Helena, St Helena & Islands in December is 22°C.

Q: Does it ever rain in St Helena & Islands in December?

There are usually 12 days with some rain in St Helena, St Helena & Islands in December and the average monthly rainfall is 37mm.

Expect daytime maximum temperatures of 68°F in St Helena & Islands in December based on long-term weather averages. There are 12 days with some rainfall.

68
68°F max day temperature
12
12 days with some rainfall
61
61°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
1.5
1.5 inches of monthly rainfall
11
11+ (Extreme) UV index
72
72°F sea temperature

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The December weather guide for St Helena & Islands (St Helena) 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 St Helena & Islands destinations

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

All St Helena & Islands destinations

Metric (°C) | Imperial (°F)

How hot is it in St Helena & Islands in December?

Daytime temperatures usually reach 68°F in St Helena, St Helena & Islands in December, falling to 61°F at night.

How warm is the sea around St Helena & Islands in December?

The average sea temperature around St Helena, St Helena & Islands in December is 72°F.

Does it ever rain in St Helena & Islands in December?

There are usually 12 days with some rain in St Helena, St Helena & Islands in December and the average monthly rainfall is 1.5 inches.

St Helena & Islands December sunrise & sunset times

Browse the sunrise and sunset times for St Helena & Islands in December 2025. Select a month to view St Helena & Islands sunrise and sunset times for the next 12 months. The St Helena & Islands sunrise and sunset times shown below are for St Helena.

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