Annual mean 26°C · wettest around April · prevailing wind E
Warmest
30.9 °C
Coldest
27.5 °C
Wettest
77%
Windiest
5.9 m/s
Prevailing
E
4.8 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
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 San Sebastián over the whole year is 26°C. August is the hottest month, with highs of about 31°C; February is the coldest, with lows of about 22°C. The rainy (wet) season in San Sebastián runs from April to August, peaking in April with a 73% chance of rain on a given day. The dry season is January to March; January is the driest month, at 46%. Winds in San Sebastián are highest in July, averaging 3.3 m/s (12 km/h), and lightest in October, at 2.1 m/s (8 km/h). The prevailing wind is from the E. The clearest skies in San Sebastián come in September, when the sky is typically 30% covered; March is the cloudiest month, at 50%.
Month by month San Sebastián 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
28°C
22°C
28°C
46%
45%
2.9 m/s
37
74
5
February
28°C
22°C
28°C
57%
49%
3.2 m/s
43
70
8
March
28°C
22°C
28°C
52%
50%
3.2 m/s
40
71
7
April
28°C
23°C
29°C
73%
48%
3.0 m/s
28
71
3
May
29°C
24°C
31°C
72%
41%
2.7 m/s
11
65
1
June
30°C
25°C
32°C
67%
34%
3.0 m/s
6
53
0
July
31°C
26°C
32°C
69%
36%
3.3 m/s
4
55
0
August
31°C
26°C
33°C
73%
36%
3.0 m/s
2
47
0
September
31°C
25°C
34°C
47%
30%
2.5 m/s
2
46
0
October
30°C
25°C
33°C
62%
33%
2.1 m/s
7
54
0
November
29°C
24°C
31°C
66%
41%
2.4 m/s
9
65
1
December
29°C
23°C
29°C
63%
43%
2.8 m/s
26
72
2
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 San Sebastián weather by season
Year round, San Sebastián has days of about 28°C at their warmest in February, its coolest month, and 31°C in August, its warmest; the coolest hours of the day run from 22°C to 26°C through the year, and the average temperature over the year is 26°C around the clock. Rain is most likely around April 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.
San Sebastián weather in winterDecember to February
High 28°CLow 22°CRain 55%
Winter in San Sebastián has typical daily highs of about 28°C and lows of about 22°C, with a 55% chance of rain on a given day.
San Sebastián weather in springMarch to May
High 28°CLow 23°CRain 66%
Spring in San Sebastián has typical daily highs of about 28°C and lows of about 23°C, with a 66% chance of rain on a given day.
San Sebastián weather in summerJune to August
High 31°CLow 25°CRain 70%
Summer in San Sebastián has typical daily highs of about 31°C and lows of about 25°C, with a 70% chance of rain on a given day.
San Sebastián weather in autumnSeptember to November
High 30°CLow 25°CRain 58%
Autumn in San Sebastián has typical daily highs of about 30°C and lows of about 25°C, with a 58% chance of rain on a given day.
When is the rainy season in San Sebastián?
The rainy (wet) season in San Sebastián runs from April to August, peaking in April with a 73% chance of rain on a given day. The dry season is January to March; January is the driest month, at 46%.
What time of year is San Sebastián windiest?
Winds in San Sebastián are highest in July, averaging 3.3 m/s (12 km/h), and lightest in October, at 2.1 m/s (8 km/h). The prevailing wind is from the E.
What is the average temperature in San Sebastián year round?
The average temperature in San Sebastián over the whole year is 26°C. August is the hottest month, with highs of about 31°C; February is the coldest, with lows of about 22°C.