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Donostia / San Sebastián, Basque Country Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Donostia / San Sebastián, Basque Country?
Donostia / San Sebastián, Basque Country gets 1567 mm of precipitation a year over about 180 rainy days. August is the warmest month (average high 23°C) and January the coldest (average low 6°C).
Oceanic climate
Donostia / San Sebastián, Basque Country has warm summers and chilly winters. Daytime highs range from about 11°C in January to 23°C in August. November is usually the wettest month. The most comfortable time to visit is typically May to October, when daytime highs sit near 20°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 6° | 12° |
| Spring | Mar–May | 9° | 16° |
| Summer | Jun–Aug | 16° | 22° |
| Autumn | Sep–Nov | 12° | 18° |
How much rain does Donostia / San Sebastián get?
Donostia / San Sebastián gets 1567 mm of precipitation in an average year, spread over about 180 days with measurable rain. That is more rainy days than 99% of Spain.
November is the wettest month, with 202 mm. July is the driest, with 91 mm. April has the most rainy days, about 17.
The longest dry spell in the last five years lasted 20 days, to February 21, 2023.
From October 2025 to September 2026 Donostia / San Sebastián got 1411 mm of rain, against a normal of 1567 mm for those months. February 2026 had the most, with 251 mm.
Donostia / San Sebastián weather by month
Donostia / San Sebastián weather in January
In January, Donostia / San Sebastián averages a high of 11°C and a low of 6°C. It gets 151 mm of precipitation over about 16 rainy days. Estimated sunshine is 33% of daylight hours, derived from ERA5 cloud cover. The January record high is 23°C (2022) and the record low is -10°C (1985).
Donostia / San Sebastián weather in February
In February, Donostia / San Sebastián averages a high of 12°C and a low of 6°C. It gets 124 mm of precipitation over about 14 rainy days. Estimated sunshine is 35% of daylight hours, derived from ERA5 cloud cover. The February record high is 26°C (2019) and the record low is -6°C (2012).
Donostia / San Sebastián weather in March
In March, Donostia / San Sebastián averages a high of 14°C and a low of 8°C. It gets 119 mm of precipitation over about 14 rainy days. Estimated sunshine is 33% of daylight hours, derived from ERA5 cloud cover. The March record high is 28°C (1990) and the record low is -6°C (1971).
Donostia / San Sebastián weather in April
In April, Donostia / San Sebastián averages a high of 15°C and a low of 9°C. It gets 126 mm of precipitation over about 17 rainy days. Estimated sunshine is 33% of daylight hours, derived from ERA5 cloud cover. The April record high is 30°C (2011) and the record low is -1°C (1986).
Donostia / San Sebastián weather in May
In May, Donostia / San Sebastián averages a high of 18°C and a low of 11°C. It gets 122 mm of precipitation over about 16 rainy days. Estimated sunshine is 31% of daylight hours, derived from ERA5 cloud cover. The May record high is 33°C (2026) and the record low is 3°C (1985). May is one of the most comfortable months to visit.
Donostia / San Sebastián weather in June
In June, Donostia / San Sebastián averages a high of 21°C and a low of 14°C. It gets 96 mm of precipitation over about 15 rainy days. Estimated sunshine is 28% of daylight hours, derived from ERA5 cloud cover. The June record high is 38°C (2003) and the record low is 7°C (1972). June is one of the most comfortable months to visit.
Donostia / San Sebastián weather in July
In July, Donostia / San Sebastián averages a high of 22°C and a low of 16°C. It gets 91 mm of precipitation over about 14 rainy days. Estimated sunshine is 40% of daylight hours, derived from ERA5 cloud cover. The July record high is 37°C (1975) and the record low is 9°C (1978). July is one of the most comfortable months to visit.
Donostia / San Sebastián weather in August
In August, Donostia / San Sebastián averages a high of 23°C and a low of 17°C. It gets 109 mm of precipitation over about 14 rainy days. Estimated sunshine is 40% of daylight hours, derived from ERA5 cloud cover. The August record high is 37°C (2011) and the record low is 9°C (1977). August is one of the most comfortable months to visit.
Donostia / San Sebastián weather in September
In September, Donostia / San Sebastián averages a high of 21°C and a low of 15°C. It gets 117 mm of precipitation over about 13 rainy days. Estimated sunshine is 40% of daylight hours, derived from ERA5 cloud cover. The September record high is 36°C (2016) and the record low is 7°C (1974). September is one of the most comfortable months to visit.
Donostia / San Sebastián weather in October
In October, Donostia / San Sebastián averages a high of 18°C and a low of 12°C. It gets 155 mm of precipitation over about 15 rainy days. Estimated sunshine is 34% of daylight hours, derived from ERA5 cloud cover. The October record high is 32°C (2023) and the record low is 1°C (2003). October is one of the most comfortable months to visit.
Donostia / San Sebastián weather in November
In November, Donostia / San Sebastián averages a high of 14°C and a low of 9°C. It gets 202 mm of precipitation over about 16 rainy days. Estimated sunshine is 29% of daylight hours, derived from ERA5 cloud cover. The November record high is 26°C (2015) and the record low is -3°C (1988).
Donostia / San Sebastián weather in December
In December, Donostia / San Sebastián averages a high of 12°C and a low of 7°C. It gets 153 mm of precipitation over about 16 rainy days. Estimated sunshine is 28% of daylight hours, derived from ERA5 cloud cover. The December record high is 22°C (1979) and the record low is -7°C (1973).
Sunshine, humidity and wind in Donostia / San Sebastián
July is the sunniest month in Donostia / San Sebastián, with estimated sunshine of 40% of daylight hours from ERA5 cloud cover. June is the cloudiest, at 28%. The annual cloud-cover estimate is 34% of daylight hours; it is not a measurement of sunshine duration. Donostia / San Sebastián is cloudier than 96% of Spain.
Humidity peaks in June at 82% and is lowest in March at 73%.
Donostia / San Sebastián has about 3 days a year above 32°C. Donostia / San Sebastián is cooler than 94% of Spain.
First and last freeze in Donostia / San Sebastián
The first fall freeze in Donostia / San Sebastián typically comes around December 13, and the last spring freeze around February 9. That leaves a frost-free growing season of about 307 days.
Donostia / San Sebastián weather records
These records cover SAN SEBASTIAN - IGUELDO during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Donostia / San Sebastián station is 38°C, on June 21, 2003. The coldest is -10°C, on January 6, 1985.
The wettest day in the available station history brought 168 mm of precipitation, on May 31, 1997.
31 all-time records have been set at the station since 1970.
The annual mean temperature has changed by +0.3°C per decade since 1970.
The best time to visit Donostia / San Sebastián
The most comfortable time to visit is typically May to October, when daytime highs sit near 20°C.
Winter (December–February) is chilly, with average highs around 12°C and lows near 6°C.
Spring (March–May) is mild, with average highs around 16°C and lows near 9°C.
Summer (June–August) is warm, with average highs around 22°C and lows near 16°C. It can feel humid.
Autumn (September–November) is mild, with average highs around 18°C and lows near 12°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | 6° | 11° | 151 mm | 16 | 78% | 33% | 23° | -10° |
| February | 6° | 12° | 124 mm | 14 | 75% | 35% | 26° | -6° |
| March | 8° | 14° | 119 mm | 14 | 73% | 33% | 28° | -6° |
| April | 9° | 15° | 126 mm | 17 | 75% | 33% | 30° | -1° |
| May | 11° | 18° | 122 mm | 16 | 79% | 31% | 33° | 3° |
| June | 14° | 21° | 96 mm | 15 | 82% | 28% | 38° | 7° |
| July | 16° | 22° | 91 mm | 14 | 81% | 40% | 37° | 9° |
| August | 17° | 23° | 109 mm | 14 | 81% | 40% | 37° | 9° |
| September | 15° | 21° | 117 mm | 13 | 78% | 40% | 36° | 7° |
| October | 12° | 18° | 155 mm | 15 | 76% | 34% | 32° | 1° |
| November | 9° | 14° | 202 mm | 16 | 80% | 29% | 26° | -3° |
| December | 7° | 12° | 153 mm | 16 | 80% | 28% | 22° | -7° |
Station: SAN SEBASTIAN - IGUELDO, 5 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Donostia / San Sebastián climate questions
How much rain does Donostia / San Sebastián get?
Donostia / San Sebastián gets 1567 mm of precipitation in an average year, over about 180 rainy days.
What is the wettest month in Donostia / San Sebastián?
November is the wettest month in Donostia / San Sebastián, with 202 mm. July is the driest, with 91 mm.
How many rainy days does Donostia / San Sebastián have a year?
Donostia / San Sebastián has about 180 days with measurable rain in an average year. April has the most, about 17.
What is the hottest month in Donostia / San Sebastián?
August is the warmest month in Donostia / San Sebastián, with an average high of 23°C.
What is the coldest month in Donostia / San Sebastián?
January is the coldest month in Donostia / San Sebastián, with an average low of 6°C.
What is the record high temperature in Donostia / San Sebastián?
Within the available 1970–2026 station history, the record high at the Donostia / San Sebastián station is 38°C, set on June 21, 2003. The record low is -10°C, on January 6, 1985.
What is the sunniest month in Donostia / San Sebastián?
July is the sunniest month in Donostia / San Sebastián, with estimated sunshine of 40% of daylight hours from ERA5 cloud cover. June is the cloudiest.
When is the first frost in Donostia / San Sebastián?
The first fall freeze in Donostia / San Sebastián typically comes around December 13. The last spring freeze is around February 9.
What is the best time to visit Donostia / San Sebastián?
The most comfortable time to visit is typically May to October, when daytime highs sit near 20°C.