San Sebastian, Spain: Annual Weather Averages

July is the hottest month in San Sebastian with an average temperature of 20.5°C (69°F) and the coldest is January at 8.5°C (47°F) with the most daily sunshine hours at 6 in September. The wettest month is November with an average of 165mm of rain. The best month to swim in the sea is in August when the average sea temperature is 21.4°C (71°F).

Average Temperature: San Sebastian

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 9 10 11 13 15 18 21 21 20 16 12 10
°F 47 49 52 55 59 64 69 69 67 60 53 49

Average High/Low Temperature: San Sebastian

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High °C 12 13 15 17 19 22 25 25 25 20 15 13
Low °C 5 6 7 8 11 14 16 16 14 11 8 6
High °F 54 55 59 63 66 72 77 77 77 68 59 55
Low °F 41 43 45 46 52 57 61 61 57 52 46 43

Average Rainfall: San Sebastian

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 160 130 130 160 120 90 70 110 115 145 165 130
Days 13 12 12 16 14 12 11 11 12 14 15 14

Average Daily Sunshine Hours: San Sebastian

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hours 4 4 5 6 6 6 6 6 6 5 3 3

Average Sea Temperature: San Sebastian

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 13 12 13 14 16 19 21 21 21 19 16 14
°F 55 54 55 57 62 67 69 71 69 66 62 58

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