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San Sebastian — weather in September, water temperature

By months January February March April May June July August September October November December
23.3°C Daytime temperatures 15.1°C Night temperatures 15 Sunny days 11.8-13.2 Sun (hours) 4 Rainy days 50.8 mm Precipitation 21.2°C water temperature
Air temperature
2022 2021 2020 2019 2018 2017 2016 2015 2014 2013
The maximum daily temperature 36°C — 7 September 2016.
The maximum night temperature 24.7°C — 13 September 2016.
The minimum daily temperature 13.5°C — 29 September 2022.
The minimum night temperature 6.7°C — 20 September 2015.
water temperature
2022 2021 2020 2019 2018 2017 2016 2015 2014 2013
The warmest water 23 °C — 8 September 2022. The coldest water 19.4 °C — 25 September 2015.
Sunny, cloudy and gloomy days
Precipitation, mm
Maximum precipitation 140.7 mm — November. Minimum precipitation 50.8 mm — September.
Wind speed, km / h
Maximum wind speed 14.4 km / h — December. Minimum wind speed 9.3 km / h — August.
Number of hours of sunshine
The maximum number of hours of sunshine per day 9.2 h. — August. The minimum number of hours of sunshine per day 4.6 h. — January.
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