St Helena weather by month

Check out St Helena weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in St Helena (°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 Helena22
23°C maximum daytime temperature in February in St Helena23
23°C maximum daytime temperature in March in St Helena23
22°C maximum daytime temperature in April in St Helena22
21°C maximum daytime temperature in May in St Helena21
19°C maximum daytime temperature in June in St Helena19
18°C maximum daytime temperature in July in St Helena18
17°C maximum daytime temperature in August in St Helena17
18°C maximum daytime temperature in September in St Helena18
18°C maximum daytime temperature in October in St Helena18
19°C maximum daytime temperature in November in St Helena19
20°C maximum daytime temperature in December in St Helena20
Min temperature (night-time)
18°C minimum night-time temperature in January in St Helena18
19°C minimum night-time temperature in February in St Helena19
19°C minimum night-time temperature in March in St Helena19
18°C minimum night-time temperature in April in St Helena18
17°C minimum night-time temperature in May in St Helena17
16°C minimum night-time temperature in June in St Helena16
15°C minimum night-time temperature in July in St Helena15
14°C minimum night-time temperature in August in St Helena14
15°C minimum night-time temperature in September in St Helena15
15°C minimum night-time temperature in October in St Helena15
15°C minimum night-time temperature in November in St Helena15
16°C minimum night-time temperature in December in St Helena16
Heat & Humidity
No heat & humidity in January in St Helena0
No heat & humidity in February in St Helena0
No heat & humidity in March in St Helena0
No heat & humidity in April in St Helena0
No heat & humidity in May in St Helena0
No heat & humidity in June in St Helena0
No heat & humidity in July in St Helena0
No heat & humidity in August in St Helena0
No heat & humidity in September in St Helena0
No heat & humidity in October in St Helena0
No heat & humidity in November in St Helena0
No heat & humidity in December in St Helena0
Sea temperature
23°C sea temperature in January in St Helena23
24°C sea temperature in February in St Helena24
25°C sea temperature in March in St Helena25
25°C sea temperature in April in St Helena25
24°C sea temperature in May in St Helena24
23°C sea temperature in June in St Helena23
21°C sea temperature in July in St Helena21
21°C sea temperature in August in St Helena21
20°C sea temperature in September in St Helena20
20°C sea temperature in October in St Helena20
21°C sea temperature in November in St Helena21
22°C sea temperature in December in St Helena22

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

Sunshine & Daylight in St Helena

  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 Helena13
13 hours of daylight per day in February in St Helena13
12 hours of daylight per day in March in St Helena12
12 hours of daylight per day in April in St Helena12
11 hours of daylight per day in May in St Helena11
11 hours of daylight per day in June in St Helena11
11 hours of daylight per day in July in St Helena11
12 hours of daylight per day in August in St Helena12
12 hours of daylight per day in September in St Helena12
12 hours of daylight per day in October in St Helena12
13 hours of daylight per day in November in St Helena13
13 hours of daylight per day in December in St Helena13
UV Index (Maximum)
UV (maximum) index 11+ (Extreme) in January in St Helena11
UV (maximum) index 11+ (Extreme) in February in St Helena11
UV (maximum) index 11+ (Extreme) in March in St Helena11
UV (maximum) index 11 (Extreme) in April in St Helena11
UV (maximum) index 9 (Very High) in May in St Helena9
UV (maximum) index 7 (High) in June in St Helena7
UV (maximum) index 8 (Very High) in July in St Helena8
UV (maximum) index 9 (Very High) in August in St Helena9
UV (maximum) index 11 (Extreme) in September in St Helena11
UV (maximum) index 11+ (Extreme) in October in St Helena11
UV (maximum) index 11+ (Extreme) in November in St Helena11
UV (maximum) index 11+ (Extreme) in December in St Helena11

Rainfall in St Helena

  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 Helena14
14 days with some rainfall in February in St Helena14
15 days with some rainfall in March in St Helena15
15 days with some rainfall in April in St Helena15
14 days with some rainfall in May in St Helena14
16 days with some rainfall in June in St Helena16
16 days with some rainfall in July in St Helena16
15 days with some rainfall in August in St Helena15
12 days with some rainfall in September in St Helena12
14 days with some rainfall in October in St Helena14
13 days with some rainfall in November in St Helena13
12 days with some rainfall in December in St Helena12
Average monthly rainfall (mm)
53 mm monthly rainfall in January in St Helena53
68 mm monthly rainfall in February in St Helena68
90 mm monthly rainfall in March in St Helena90
63 mm monthly rainfall in April in St Helena63
71 mm monthly rainfall in May in St Helena71
87 mm monthly rainfall in June in St Helena87
84 mm monthly rainfall in July in St Helena84
68 mm monthly rainfall in August in St Helena68
54 mm monthly rainfall in September in St Helena54
43 mm monthly rainfall in October in St Helena43
30 mm monthly rainfall in November in St Helena30
37 mm monthly rainfall in December in St Helena37

More about St Helena

St Helena by month

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

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The climate guide for St Helena & Islands (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.

What's the climate like in St Helena?

St Helena has a hot desert climate.

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

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Compare St Helena with the USA

Below the St Helena chart shows average maximum daytime temperature for St Helena, St Helena, Ascension and Tristan da Cunha and the USA (Washington).

Maximum daytime temperature (°C)

St Helena, St Helena, Ascension and Tristan da Cunha
USA (Washington)
22
5
23
7
23
13
22
19
21
24
19
29
18
31
17
30
18
26
18
20
19
14
20
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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

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