Ascension Island weather by month

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

Temperature in Ascension Island (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
27°C maximum daytime temperature in January in Ascension Island27
29°C maximum daytime temperature in February in Ascension Island29
29°C maximum daytime temperature in March in Ascension Island29
29°C maximum daytime temperature in April in Ascension Island29
28°C maximum daytime temperature in May in Ascension Island28
27°C maximum daytime temperature in June in Ascension Island27
26°C maximum daytime temperature in July in Ascension Island26
26°C maximum daytime temperature in August in Ascension Island26
26°C maximum daytime temperature in September in Ascension Island26
26°C maximum daytime temperature in October in Ascension Island26
26°C maximum daytime temperature in November in Ascension Island26
27°C maximum daytime temperature in December in Ascension Island27
Min temperature (night-time)
24°C minimum night-time temperature in January in Ascension Island24
25°C minimum night-time temperature in February in Ascension Island25
26°C minimum night-time temperature in March in Ascension Island26
26°C minimum night-time temperature in April in Ascension Island26
25°C minimum night-time temperature in May in Ascension Island25
24°C minimum night-time temperature in June in Ascension Island24
24°C minimum night-time temperature in July in Ascension Island24
23°C minimum night-time temperature in August in Ascension Island23
23°C minimum night-time temperature in September in Ascension Island23
23°C minimum night-time temperature in October in Ascension Island23
23°C minimum night-time temperature in November in Ascension Island23
24°C minimum night-time temperature in December in Ascension Island24
Heat & Humidity
Moderate heat & humidity in January in Ascension IslandM
Moderate heat & humidity in February in Ascension IslandM
High heat & humidity in March in Ascension IslandH
High heat & humidity in April in Ascension IslandH
Moderate heat & humidity in May in Ascension IslandM
Moderate heat & humidity in June in Ascension IslandM
Low heat & humidity in July in Ascension IslandL
Low heat & humidity in August in Ascension IslandL
Low heat & humidity in September in Ascension IslandL
Low heat & humidity in October in Ascension IslandL
Low heat & humidity in November in Ascension IslandL
Moderate heat & humidity in December in Ascension IslandM
Sea temperature
26°C sea temperature in January in Ascension Island26
27°C sea temperature in February in Ascension Island27
27°C sea temperature in March in Ascension Island27
28°C sea temperature in April in Ascension Island28
27°C sea temperature in May in Ascension Island27
27°C sea temperature in June in Ascension Island27
26°C sea temperature in July in Ascension Island26
25°C sea temperature in August in Ascension Island25
24°C sea temperature in September in Ascension Island24
24°C sea temperature in October in Ascension Island24
25°C sea temperature in November in Ascension Island25
25°C sea temperature in December in Ascension Island25

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

Sunshine & Daylight in Ascension Island

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
13 hours of daylight per day in January in Ascension Island13
12 hours of daylight per day in February in Ascension Island12
12 hours of daylight per day in March in Ascension Island12
12 hours of daylight per day in April in Ascension Island12
12 hours of daylight per day in May in Ascension Island12
12 hours of daylight per day in June in Ascension Island12
12 hours of daylight per day in July in Ascension Island12
12 hours of daylight per day in August in Ascension Island12
12 hours of daylight per day in September in Ascension Island12
12 hours of daylight per day in October in Ascension Island12
12 hours of daylight per day in November in Ascension Island12
13 hours of daylight per day in December in Ascension Island13
UV Index (Maximum)
UV (maximum) index 11+ (Extreme) in January in Ascension Island11
UV (maximum) index 11+ (Extreme) in February in Ascension Island11
UV (maximum) index 11+ (Extreme) in March in Ascension Island11
UV (maximum) index 11+ (Extreme) in April in Ascension Island11
UV (maximum) index 11 (Extreme) in May in Ascension Island11
UV (maximum) index 9 (Very High) in June in Ascension Island9
UV (maximum) index 9 (Very High) in July in Ascension Island9
UV (maximum) index 11 (Extreme) in August in Ascension Island11
UV (maximum) index 11+ (Extreme) in September in Ascension Island11
UV (maximum) index 11+ (Extreme) in October in Ascension Island11
UV (maximum) index 11+ (Extreme) in November in Ascension Island11
UV (maximum) index 11+ (Extreme) in December in Ascension Island11

Rainfall in Ascension Island

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
8 days with some rainfall in January in Ascension Island8
12 days with some rainfall in February in Ascension Island12
14 days with some rainfall in March in Ascension Island14
15 days with some rainfall in April in Ascension Island15
20 days with some rainfall in May in Ascension Island20
22 days with some rainfall in June in Ascension Island22
20 days with some rainfall in July in Ascension Island20
20 days with some rainfall in August in Ascension Island20
17 days with some rainfall in September in Ascension Island17
17 days with some rainfall in October in Ascension Island17
13 days with some rainfall in November in Ascension Island13
11 days with some rainfall in December in Ascension Island11
Average monthly rainfall (mm)
9 mm monthly rainfall in January in Ascension Island9
11 mm monthly rainfall in February in Ascension Island11
43 mm monthly rainfall in March in Ascension Island43
33 mm monthly rainfall in April in Ascension Island33
31 mm monthly rainfall in May in Ascension Island31
33 mm monthly rainfall in June in Ascension Island33
28 mm monthly rainfall in July in Ascension Island28
28 mm monthly rainfall in August in Ascension Island28
36 mm monthly rainfall in September in Ascension Island36
15 mm monthly rainfall in October in Ascension Island15
12 mm monthly rainfall in November in Ascension Island12
12 mm monthly rainfall in December in Ascension Island12

More about Ascension Island

Ascension Island 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 (Ascension Island) 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 Ascension Island?

Ascension Island has a hot desert climate.

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

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Compare Ascension Island with the USA

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

Maximum daytime temperature (°C)

Ascension Island, St Helena, Ascension and Tristan da Cunha
USA (Washington)
27
5
29
7
29
13
29
19
28
24
27
29
26
31
26
30
26
26
26
20
26
14
27
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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

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