St Helena & Islands climate guide

Temperature in St Helena & Islands (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
22°C maximum daytime temperature in January in St Helena & Islands (St Helena)22
23°C maximum daytime temperature in February in St Helena & Islands (St Helena)23
23°C maximum daytime temperature in March in St Helena & Islands (St Helena)23
22°C maximum daytime temperature in April in St Helena & Islands (St Helena)22
21°C maximum daytime temperature in May in St Helena & Islands (St Helena)21
19°C maximum daytime temperature in June in St Helena & Islands (St Helena)19
18°C maximum daytime temperature in July in St Helena & Islands (St Helena)18
17°C maximum daytime temperature in August in St Helena & Islands (St Helena)17
18°C maximum daytime temperature in September in St Helena & Islands (St Helena)18
18°C maximum daytime temperature in October in St Helena & Islands (St Helena)18
19°C maximum daytime temperature in November in St Helena & Islands (St Helena)19
20°C maximum daytime temperature in December in St Helena & Islands (St Helena)20
Min temperature (night-time)
18°C minimum night-time temperature in January in St Helena & Islands (St Helena)18
19°C minimum night-time temperature in February in St Helena & Islands (St Helena)19
19°C minimum night-time temperature in March in St Helena & Islands (St Helena)19
18°C minimum night-time temperature in April in St Helena & Islands (St Helena)18
17°C minimum night-time temperature in May in St Helena & Islands (St Helena)17
16°C minimum night-time temperature in June in St Helena & Islands (St Helena)16
15°C minimum night-time temperature in July in St Helena & Islands (St Helena)15
14°C minimum night-time temperature in August in St Helena & Islands (St Helena)14
15°C minimum night-time temperature in September in St Helena & Islands (St Helena)15
15°C minimum night-time temperature in October in St Helena & Islands (St Helena)15
15°C minimum night-time temperature in November in St Helena & Islands (St Helena)15
16°C minimum night-time temperature in December in St Helena & Islands (St Helena)16
Sea temperature
23°C sea temperature in January in St Helena & Islands (St Helena)23
24°C sea temperature in February in St Helena & Islands (St Helena)24
25°C sea temperature in March in St Helena & Islands (St Helena)25
25°C sea temperature in April in St Helena & Islands (St Helena)25
24°C sea temperature in May in St Helena & Islands (St Helena)24
23°C sea temperature in June in St Helena & Islands (St Helena)23
21°C sea temperature in July in St Helena & Islands (St Helena)21
21°C sea temperature in August in St Helena & Islands (St Helena)21
20°C sea temperature in September in St Helena & Islands (St Helena)20
20°C sea temperature in October in St Helena & Islands (St Helena)20
21°C sea temperature in November in St Helena & Islands (St Helena)21
22°C sea temperature in December in St Helena & Islands (St Helena)22

Sunshine & Daylight in St Helena & Islands

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of daylight
13 hours of daylight per day in January in St Helena & Islands (St Helena)13
13 hours of daylight per day in February in St Helena & Islands (St Helena)13
12 hours of daylight per day in March in St Helena & Islands (St Helena)12
12 hours of daylight per day in April in St Helena & Islands (St Helena)12
11 hours of daylight per day in May in St Helena & Islands (St Helena)11
11 hours of daylight per day in June in St Helena & Islands (St Helena)11
11 hours of daylight per day in July in St Helena & Islands (St Helena)11
12 hours of daylight per day in August in St Helena & Islands (St Helena)12
12 hours of daylight per day in September in St Helena & Islands (St Helena)12
12 hours of daylight per day in October in St Helena & Islands (St Helena)12
13 hours of daylight per day in November in St Helena & Islands (St Helena)13
13 hours of daylight per day in December in St Helena & Islands (St Helena)13

Rainfall in St Helena & Islands

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
14 days with some rainfall in January in St Helena & Islands (St Helena)14
14 days with some rainfall in February in St Helena & Islands (St Helena)14
15 days with some rainfall in March in St Helena & Islands (St Helena)15
15 days with some rainfall in April in St Helena & Islands (St Helena)15
14 days with some rainfall in May in St Helena & Islands (St Helena)14
16 days with some rainfall in June in St Helena & Islands (St Helena)16
16 days with some rainfall in July in St Helena & Islands (St Helena)16
15 days with some rainfall in August in St Helena & Islands (St Helena)15
12 days with some rainfall in September in St Helena & Islands (St Helena)12
14 days with some rainfall in October in St Helena & Islands (St Helena)14
13 days with some rainfall in November in St Helena & Islands (St Helena)13
12 days with some rainfall in December in St Helena & Islands (St Helena)12
Average monthly rainfall (mm)
53 mm monthly rainfall in January in St Helena & Islands (St Helena)53
68 mm monthly rainfall in February in St Helena & Islands (St Helena)68
90 mm monthly rainfall in March in St Helena & Islands (St Helena)90
63 mm monthly rainfall in April in St Helena & Islands (St Helena)63
71 mm monthly rainfall in May in St Helena & Islands (St Helena)71
87 mm monthly rainfall in June in St Helena & Islands (St Helena)87
84 mm monthly rainfall in July in St Helena & Islands (St Helena)84
68 mm monthly rainfall in August in St Helena & Islands (St Helena)68
54 mm monthly rainfall in September in St Helena & Islands (St Helena)54
43 mm monthly rainfall in October in St Helena & Islands (St Helena)43
30 mm monthly rainfall in November in St Helena & Islands (St Helena)30
37 mm monthly rainfall in December in St Helena & Islands (St Helena)37

More climate for St Helena & Islands

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 11+ (Extreme) in January in St Helena & Islands (St Helena)11
UV (maximum) index 11+ (Extreme) in February in St Helena & Islands (St Helena)11
UV (maximum) index 11+ (Extreme) in March in St Helena & Islands (St Helena)11
UV (maximum) index 11 (Extreme) in April in St Helena & Islands (St Helena)11
UV (maximum) index 9 (Very High) in May in St Helena & Islands (St Helena)9
UV (maximum) index 7 (High) in June in St Helena & Islands (St Helena)7
UV (maximum) index 8 (Very High) in July in St Helena & Islands (St Helena)8
UV (maximum) index 9 (Very High) in August in St Helena & Islands (St Helena)9
UV (maximum) index 11 (Extreme) in September in St Helena & Islands (St Helena)11
UV (maximum) index 11+ (Extreme) in October in St Helena & Islands (St Helena)11
UV (maximum) index 11+ (Extreme) in November in St Helena & Islands (St Helena)11
UV (maximum) index 11+ (Extreme) in December in St Helena & Islands (St Helena)11
Heat & Humidity
No heat & humidity in January in St Helena & Islands (St Helena)0
No heat & humidity in February in St Helena & Islands (St Helena)0
No heat & humidity in March in St Helena & Islands (St Helena)0
No heat & humidity in April in St Helena & Islands (St Helena)0
No heat & humidity in May in St Helena & Islands (St Helena)0
No heat & humidity in June in St Helena & Islands (St Helena)0
No heat & humidity in July in St Helena & Islands (St Helena)0
No heat & humidity in August in St Helena & Islands (St Helena)0
No heat & humidity in September in St Helena & Islands (St Helena)0
No heat & humidity in October in St Helena & Islands (St Helena)0
No heat & humidity in November in St Helena & Islands (St Helena)0
No heat & humidity in December in St Helena & Islands (St Helena)0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Going to St Helena & Islands? Find the best month to visit St Helena & Islands based on the weather.

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

Check climate guides for St Helena & Islands showing average temperature, rainfall & sunshine figures for each month of the year. The climate guide shown above is for St Helena.

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More about St Helena & Islands

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

The climate guide for St Helena & Islands, represented by St Helena, shows long term monthly 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.

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

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