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Monthly climate in San Sebastian, Basque Country, Spain

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification San Sebastian features a oceanic climate (Cfb).Temperatures typically range between 7 °C (45 °F) and 20 °C (67 °F) through the year, but rarely can drop to -4 °C (25 °F) or can rise to as high as 33 °C (91 °F).The average annual precipitation amounts to about 1591 mm (62.7 inches) and receives 180 rainy days on the 1 mm (0.04 inches) threshold annually.San Sebastian enjoys an average of 3656 hours of sunshine throughout the year, and daylight varies from 9 hours 1 minutes to 15 hours 19 minutes per day.

Monthly average temperatures in San Sebastian, Basque Country, Spain §

The warmest months in San Sebastian are July, August and September, with daily mean temperatures ranging from 18 to 20 °C (65 - 67 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 7 to 9 °C (45 - 49 °F) throughout the day. On average each year, San Sebastian experiences 16 days above 25 °C (77.0 °F) and 2 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in San Sebastian, Basque Country, Spain.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 18°C
(65°F)		 22°C
(71°F)		 22°C
(71°F)		 23°C
(74°F)		 27°C
(80°F)		 32°C
(90°F)		 33°C
(91°F)		 31°C
(88°F)		 29°C
(85°F)		 26°C
(79°F)		 22°C
(72°F)		 18°C
(64°F)
Mean maximum 16°C
(61°F)		 18°C
(65°F)		 19°C
(66°F)		 21°C
(70°F)		 24°C
(76°F)		 27°C
(80°F)		 30°C
(85°F)		 29°C
(85°F)		 28°C
(82°F)		 24°C
(76°F)		 20°C
(68°F)		 16°C
(62°F)
Average high 10°C
(50°F)		 12°C
(55°F)		 13°C
(56°F)		 15°C
(59°F)		 17°C
(64°F)		 20°C
(69°F)		 22°C
(72°F)		 23°C
(73°F)		 21°C
(71°F)		 18°C
(65°F)		 13°C
(57°F)		 12°C
(53°F)
Daily mean 7°C
(45°F)		 9°C
(49°F)		 10°C
(51°F)		 12°C
(54°F)		 14°C
(58°F)		 17°C
(63°F)		 19°C
(67°F)		 20°C
(67°F)		 18°C
(65°F)		 15°C
(59°F)		 11°C
(52°F)		 9°C
(49°F)
Average low 5°C
(41°F)		 7°C
(45°F)		 7°C
(46°F)		 9°C
(48°F)		 11°C
(53°F)		 15°C
(58°F)		 16°C
(62°F)		 17°C
(62°F)		 15°C
(60°F)		 12°C
(54°F)		 9°C
(48°F)		 7°C
(46°F)
Mean minimum 0°C
(33°F)		 2°C
(36°F)		 3°C
(37°F)		 3°C
(38°F)		 7°C
(45°F)		 11°C
(52°F)		 13°C
(56°F)		 13°C
(55°F)		 10°C
(51°F)		 7°C
(45°F)		 4°C
(40°F)		 3°C
(38°F)
Minimum -2°C
(29°F)		 -4°C
(25°F)		 -1°C
(30°F)		 1°C
(34°F)		 4°C
(39°F)		 10°C
(50°F)		 12°C
(53°F)		 12°C
(53°F)		 9°C
(48°F)		 5°C
(41°F)		 2°C
(36°F)		 -1°C
(31°F)

Compare climate in San Sebastian with other places

Compare temperature, precipitation, sunshine, UV index in San Sebastian, Basque Country, Spain with other places around the world.

Monthly average precipitation in San Sebastian, Basque Country, Spain §

San Sebastian usually has the most precipitation in January, November and December, with an average of 16 rainy days and 185 mm (7.3 inches) of precipitation per month.The driest months in San Sebastian are July, August and September. On average, 95 mm (3.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in San Sebastian, Basque Country, Spain.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 147 (5.8) 130 (5.1) 124 (4.9) 108 (4.3) 120 (4.7) 135 (5.3) 93 (3.7) 95 (3.7) 97 (3.8) 135 (5.3) 190 (7.5) 217 (8.5)
Average precipitation days (≥ 1 mm) 14 13 17 14 17 15 14 15 12 14 18 17

Monthly sunshine hours in San Sebastian, Basque Country, Spain §

The sunniest months in San Sebastian are June, July and August, when the sun shines an average of 12 hours 41 minutes a day.Least sunny months in San Sebastian: January, November and December receive an average of 6 hours 39 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in San Sebastian, Basque Country, Spain.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 170 240 304 333 369 380 402 385 335 292 229 212
Mean daily daylight hours 9h 22m 10h 30m 11h 57m 13h 26m 14h 41m 15h 19m 14h 59m 13h 52m 12h 27m 10h 58m 9h 41m 9h 1m

Solar UV radiation in San Sebastian, Basque Country, Spain §

San Sebastian experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure.January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly San Sebastian UV Index data.

Average daily maximum UV levels by month for San Sebastian, Basque Country, Spain.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 2 4 6 7 9 10 10 9 7 5 3 2