Annual mean 13°C · wettest around December · prevailing wind W
Warmest
29.8 °C
Coldest
3.5 °C
Wettest
28%
Windiest
4.8 m/s
Prevailing
W
3.9 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
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 Southampton over the whole year is 13°C. July is the hottest month, with highs of about 29°C; January is the coldest, with lows of about -1°C. Southampton has no sharply defined rainy season: the chance of rain on a given day runs from 21% in January, the driest month, to 28% in December, the wettest. Winds in Southampton are highest in March, averaging 3.5 m/s (13 km/h), and lightest in July, at 2.2 m/s (8 km/h). The prevailing wind is from the W. The clearest skies in Southampton come in November, when the sky is typically 34% covered; May is the cloudiest month, at 51%.
Month by month Southampton 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
4°C
-1°C
-2°C
21%
47%
3.1 m/s
1
0
11
February
6°C
1°C
1°C
26%
45%
3.0 m/s
4
0
22
March
10°C
3°C
5°C
23%
44%
3.5 m/s
11
0
38
April
15°C
8°C
11°C
23%
47%
3.4 m/s
30
4
61
May
20°C
14°C
18°C
24%
51%
2.9 m/s
58
17
64
June
26°C
19°C
25°C
21%
37%
2.7 m/s
59
47
34
July
29°C
22°C
31°C
23%
34%
2.2 m/s
23
60
6
August
28°C
21°C
29°C
23%
36%
2.2 m/s
40
60
15
September
24°C
17°C
24°C
22%
41%
2.3 m/s
67
38
43
October
19°C
11°C
17°C
23%
43%
2.4 m/s
57
11
71
November
12°C
5°C
8°C
22%
34%
2.7 m/s
16
1
49
December
6°C
2°C
1°C
28%
44%
2.7 m/s
2
0
20
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 Southampton weather by season
Year round, Southampton has days of about 4°C at their warmest in January, its coolest month, and 29°C in July, 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 13°C around the clock. Rain is most likely around December and least likely around January. 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.
Southampton weather in winterDecember to February
High 5°CLow 1°CRain 25%
Winter in Southampton has typical daily highs of about 5°C and lows of about 1°C, with a 25% chance of rain on a given day.
Southampton weather in springMarch to May
High 15°CLow 8°CRain 23%
Spring in Southampton has typical daily highs of about 15°C and lows of about 8°C, with a 23% chance of rain on a given day.
Southampton weather in summerJune to August
High 28°CLow 21°CRain 23%
Summer in Southampton has typical daily highs of about 28°C and lows of about 21°C, with a 23% chance of rain on a given day.
Southampton weather in autumnSeptember to November
High 18°CLow 11°CRain 22%
Autumn in Southampton has typical daily highs of about 18°C and lows of about 11°C, with a 22% chance of rain on a given day.
When is the rainy season in Southampton?
Southampton has no sharply defined rainy season: the chance of rain on a given day runs from 21% in January, the driest month, to 28% in December, the wettest.
What time of year is Southampton windiest?
Winds in Southampton are highest in March, averaging 3.5 m/s (13 km/h), and lightest in July, at 2.2 m/s (8 km/h). The prevailing wind is from the W.
What is the average temperature in Southampton year round?
The average temperature in Southampton over the whole year is 13°C. July is the hottest month, with highs of about 29°C; January is the coldest, with lows of about -1°C.