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 (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
81°F maximum daytime temperature in January in Ascension Island81
84°F maximum daytime temperature in February in Ascension Island84
84°F maximum daytime temperature in March in Ascension Island84
84°F maximum daytime temperature in April in Ascension Island84
82°F maximum daytime temperature in May in Ascension Island82
81°F maximum daytime temperature in June in Ascension Island81
79°F maximum daytime temperature in July in Ascension Island79
79°F maximum daytime temperature in August in Ascension Island79
79°F maximum daytime temperature in September in Ascension Island79
79°F maximum daytime temperature in October in Ascension Island79
79°F maximum daytime temperature in November in Ascension Island79
81°F maximum daytime temperature in December in Ascension Island81
Min temperature (night-time)
75°F minimum night-time temperature in January in Ascension Island75
77°F minimum night-time temperature in February in Ascension Island77
79°F minimum night-time temperature in March in Ascension Island79
79°F minimum night-time temperature in April in Ascension Island79
77°F minimum night-time temperature in May in Ascension Island77
75°F minimum night-time temperature in June in Ascension Island75
75°F minimum night-time temperature in July in Ascension Island75
73°F minimum night-time temperature in August in Ascension Island73
73°F minimum night-time temperature in September in Ascension Island73
73°F minimum night-time temperature in October in Ascension Island73
73°F minimum night-time temperature in November in Ascension Island73
75°F minimum night-time temperature in December in Ascension Island75
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
79°F sea temperature in January in Ascension Island79
81°F sea temperature in February in Ascension Island81
81°F sea temperature in March in Ascension Island81
82°F sea temperature in April in Ascension Island82
81°F sea temperature in May in Ascension Island81
81°F sea temperature in June in Ascension Island81
79°F sea temperature in July in Ascension Island79
77°F sea temperature in August in Ascension Island77
75°F sea temperature in September in Ascension Island75
75°F sea temperature in October in Ascension Island75
77°F sea temperature in November in Ascension Island77
77°F sea temperature in December in Ascension Island77

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 (inches)
0.4 inches monthly rainfall in January in Ascension Island0.4
0.4 inches monthly rainfall in February in Ascension Island0.4
1.7 inches monthly rainfall in March in Ascension Island1.7
1.3 inches monthly rainfall in April in Ascension Island1.3
1.2 inches monthly rainfall in May in Ascension Island1.2
1.3 inches monthly rainfall in June in Ascension Island1.3
1.1 inches monthly rainfall in July in Ascension Island1.1
1.1 inches monthly rainfall in August in Ascension Island1.1
1.4 inches monthly rainfall in September in Ascension Island1.4
0.6 inches monthly rainfall in October in Ascension Island0.6
0.5 inches monthly rainfall in November in Ascension Island0.5
0.5 inches monthly rainfall in December in Ascension Island0.5

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)  |  Imperial (°F)

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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 (°F)

Ascension Island, St Helena, Ascension and Tristan da Cunha
USA (Washington)
81
41
84
45
84
55
84
66
82
75
81
84
79
88
79
86
79
79
79
68
79
57
81
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C)  |  Imperial (°F)

Compare more Ascension Island weather >>

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