Annual mean 26°C · wettest around September · prevailing wind E
Warmest
31.9 °C
Coldest
28.9 °C
Wettest
82%
Windiest
3.9 m/s
Prevailing
E
3.0 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
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. April is the hottest month, with highs of about 32°C; January is the coldest, with lows of about 21°C. The rainy (wet) season in San Sebastián runs from April to November, peaking in September with a 72% chance of rain on a given day. The dry season is December to March; January is the driest month, at 18%. Winds in San Sebastián are highest in February, averaging 2.8 m/s (10 km/h), and lightest in June, at 1.8 m/s (6 km/h). The prevailing wind is from the E. The clearest skies in San Sebastián come in January, when the sky is typically 34% covered; June is the cloudiest month, at 59%.
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
30°C
21°C
30°C
18%
34%
2.7 m/s
26
53
13
February
31°C
21°C
30°C
22%
35%
2.8 m/s
22
56
10
March
31°C
22°C
32°C
25%
36%
2.6 m/s
16
49
6
April
32°C
23°C
33°C
52%
41%
2.4 m/s
11
38
4
May
31°C
23°C
34°C
66%
51%
1.9 m/s
9
32
3
June
30°C
23°C
33°C
66%
59%
1.8 m/s
12
34
4
July
31°C
23°C
33°C
72%
48%
2.0 m/s
11
30
5
August
30°C
23°C
33°C
68%
52%
1.9 m/s
10
31
4
September
30°C
22°C
33°C
72%
57%
1.8 m/s
10
34
3
October
29°C
22°C
32°C
70%
55%
1.8 m/s
15
38
6
November
29°C
22°C
31°C
52%
44%
2.2 m/s
21
43
10
December
29°C
21°C
30°C
37%
34%
2.6 m/s
26
49
13
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 29°C at their warmest in October, its coolest month, and 32°C in April, its warmest; the coolest hours of the day run from 21°C to 23°C through the year, and the average temperature over the year is 26°C around the clock. Rain is most likely around September 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 30°CLow 21°CRain 26%
Winter in San Sebastián has typical daily highs of about 30°C and lows of about 21°C, with a 26% chance of rain on a given day.
San Sebastián weather in springMarch to May
High 31°CLow 23°CRain 48%
Spring in San Sebastián has typical daily highs of about 31°C and lows of about 23°C, with a 48% chance of rain on a given day.
San Sebastián weather in summerJune to August
High 30°CLow 23°CRain 68%
Summer in San Sebastián has typical daily highs of about 30°C and lows of about 23°C, with a 68% chance of rain on a given day.
San Sebastián weather in autumnSeptember to November
High 29°CLow 22°CRain 64%
Autumn in San Sebastián has typical daily highs of about 29°C and lows of about 22°C, with a 64% 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 November, peaking in September with a 72% chance of rain on a given day. The dry season is December to March; January is the driest month, at 18%.
What time of year is San Sebastián windiest?
Winds in San Sebastián are highest in February, averaging 2.8 m/s (10 km/h), and lightest in June, at 1.8 m/s (6 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. April is the hottest month, with highs of about 32°C; January is the coldest, with lows of about 21°C.