St Helena & Islands weather in May 2025

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

Daytime temperatures usually reach 21°C in St Helena, St Helena & Islands in May, falling to 17°C at night.

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

The average sea temperature around St Helena, St Helena & Islands in May is 24°C.

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

There are usually 14 days with some rain in St Helena, St Helena & Islands in May and the average monthly rainfall is 71mm.

Expect 70°F daytime maximum temperatures in the shade with on average -9999 hours of sunshine per day in St Helena & Islands in May. Check more long-term weather averages for St Helena & Islands in May before you book your next holiday to St Helena & Islands in 2025/2026.

70
70°F max day temperature
14
14 days with some rainfall
63
63°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
2.8
2.8 inches of monthly rainfall
9
9 (Very High) UV index
75
75°F sea temperature

More about St Helena & Islands

St Helena & Islands by month

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

Recommended for St Helena & Islands

Argus Car Hire: Compare low prices on car hire

Sale

Compare car hire with popular rental companies
Book with no credit card fees & free cancellation policy
Find low prices based on destination & travel dates

Go to Argus Car Hire deal >>

View all Argus Car Hire offers

The May 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 May. 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 May?

Daytime temperatures usually reach 70°F in St Helena, St Helena & Islands in May, falling to 63°F at night.

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

The average sea temperature around St Helena, St Helena & Islands in May is 75°F.

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

There are usually 14 days with some rain in St Helena, St Helena & Islands in May and the average monthly rainfall is 2.8 inches.

St Helena & Islands May sunrise & sunset times

Browse the sunrise and sunset times for St Helena & Islands in May 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.

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