Annual mean 18°C · wettest around July · prevailing wind SW
Warmest
33.8 °C
Coldest
10.5 °C
Wettest
64%
Windiest
5.1 m/s
Prevailing
SW
3.6 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Ascensión over the whole year is 18°C. June is the hottest month, with highs of about 33°C; January is the coldest, with lows of about 1°C. Ascensión has no sharply defined rainy season: the chance of rain on a given day runs from 24% in May, the driest month, to 48% in July, the wettest. Winds in Ascensión are highest in March, averaging 3.7 m/s (13 km/h), and lightest in September, at 2.4 m/s (9 km/h). The prevailing wind is from the SW. The clearest skies in Ascensión come in May, when the sky is typically 16% covered; August is the cloudiest month, at 33%.
Month by month Ascensión climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
11°C
1°C
7°C
37%
26%
2.8 m/s
6
0
49
February
15°C
4°C
10°C
33%
25%
3.3 m/s
24
0
65
March
19°C
7°C
13°C
28%
25%
3.7 m/s
44
2
74
April
24°C
10°C
18°C
29%
18%
3.7 m/s
70
12
69
May
29°C
15°C
23°C
24%
16%
3.6 m/s
71
41
42
June
33°C
21°C
30°C
37%
24%
3.3 m/s
28
68
7
July
32°C
22°C
31°C
48%
32%
2.8 m/s
15
67
2
August
31°C
21°C
30°C
42%
33%
2.5 m/s
21
71
3
September
29°C
17°C
27°C
39%
27%
2.4 m/s
46
69
15
October
24°C
12°C
21°C
36%
22%
2.5 m/s
74
31
53
November
18°C
6°C
13°C
32%
23%
2.4 m/s
43
1
78
December
13°C
2°C
9°C
35%
28%
2.5 m/s
14
0
62
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Ascensión weather by season
Year round, Ascensión has days of about 11°C at their warmest in January, its coolest month, and 33°C in June, its warmest; the coolest hours of the day run from 1°C to 22°C through the year, and the average temperature over the year is 18°C around the clock. Rain is most likely around July and least likely around May. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Ascensión weather in winterDecember to February
High 13°CLow 2°CRain 35%
Winter in Ascensión has typical daily highs of about 13°C and lows of about 2°C, with a 35% chance of rain on a given day.
Ascensión weather in springMarch to May
High 24°CLow 10°CRain 27%
Spring in Ascensión has typical daily highs of about 24°C and lows of about 10°C, with a 27% chance of rain on a given day.
Ascensión weather in summerJune to August
High 32°CLow 21°CRain 42%
Summer in Ascensión has typical daily highs of about 32°C and lows of about 21°C, with a 42% chance of rain on a given day.
Ascensión weather in autumnSeptember to November
High 23°CLow 11°CRain 35%
Autumn in Ascensión has typical daily highs of about 23°C and lows of about 11°C, with a 35% chance of rain on a given day.
When is the rainy season in Ascensión?
Ascensión has no sharply defined rainy season: the chance of rain on a given day runs from 24% in May, the driest month, to 48% in July, the wettest.
What time of year is Ascensión windiest?
Winds in Ascensión are highest in March, averaging 3.7 m/s (13 km/h), and lightest in September, at 2.4 m/s (9 km/h). The prevailing wind is from the SW.
What is the average temperature in Ascensión year round?
The average temperature in Ascensión over the whole year is 18°C. June is the hottest month, with highs of about 33°C; January is the coldest, with lows of about 1°C.