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Hourly Forecast
Daylight Hours
07:55
Sunrise
20:08
Sunset
Moon
Waxing Crescent
13:45
Moonrise
22:30
Moonset
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Weather in Donostia / San Sebastián today, September 16, 2026
Rain features in Donostia / San Sebastián on September 16, 2026, so keep waterproofs handy through the day. The damp theme is strongest where shower chances rise. The morning carries the wetter risk, with rain chances near 100% and the highest odds around 03:00. Cloud is also thick early on, peaking near 100% around 02:00.
Temperatures climb from an overnight low near 18°C toward a daytime high of about 21°C. Moisture in the air spans 60%-88%, with the highest values around 02:00. Winds stay light, near 4.2 km/h by 05:00, so the day feels still more than breezy.
Expect the wet theme to continue later, as rain odds reach 48% near 22:00. Cloud amounts hold near 100% around 12:00. Visibility stays generally good near 33.4 km on average, though it can drop toward 23.8 km in thicker cloud or showers. Daylight runs from 07:55 to 20:08, lasting 12 hours 13 minutes of sunlight today.
The practical takeaway for Donostia / San Sebastián on September 16, 2026 is simple: plan for rain, keep layers handy, and work around a high of about 21°C.
Frequently asked questions about weather in Donostia / San Sebastián
How warm does it get in Donostia / San Sebastián?
The warmest month in Donostia / San Sebastián is August, with average high temperatures of 23°C. The average temperature during this period is around 20°C.
How cold does it get in Donostia / San Sebastián?
The coldest month in Donostia / San Sebastián is January, with average low temperatures of 6°C. The average temperature during this period is around 8°C.
What is the wettest time of year in Donostia / San Sebastián?
The wettest month in Donostia / San Sebastián is November, with an average of 191mm of precipitation.
What is the driest time of year in Donostia / San Sebastián?
The driest month in Donostia / San Sebastián is July, with an average of 71mm of precipitation.
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