On Saturday, 21 September, mostly partly cloudy, light rain, thunderstorm possible are expected in Donostia --- San Sebastián. The lowest air temperature will be +19°C at 11 am, the highest temperature will be +21°C around 5 pm. The atmospheric pressure will be within 757-760 mm Hg. The relative humidity 78-90%. The wind will be mainly easterly 2 m/s with maximum gusts up to 6 m/s. Ultraviolet index 4, sun protection is required

On Sunday, 22 September, mostly partly cloudy, light rain are expected in Donostia --- San Sebastián. The lowest air temperature will be +18°C at 11 am, the highest temperature will be +19°C around 2 am. The atmospheric pressure will be within 760-763 mm Hg. The relative humidity 79-87%. The wind will be mainly westerly 3 m/s with maximum gusts up to 5 m/s. Ultraviolet index 5, sun protection is required

On Monday, 23 September, mostly partly cloudy, light rain are expected in Donostia --- San Sebastián. The lowest air temperature will be +18°C at 11 am, the highest temperature will be +19°C around 8 pm. The atmospheric pressure will be within 759-762 mm Hg. The relative humidity 68-80%. The wind will be mainly northwesterly 2 m/s with maximum gusts up to 2 m/s. Ultraviolet index 4, sun protection is required

On Tuesday, 24 September, mostly partly cloudy, light rain are expected in Donostia --- San Sebastián. The lowest air temperature will be +17°C at 5 am, the highest temperature will be +21°C around 2 pm. The atmospheric pressure will be within 758-761 mm Hg. The relative humidity 61-81%. The wind will be mainly northerly 1 m/s with maximum gusts up to 2 m/s. Ultraviolet index 5, sun protection is required

On Wednesday, 25 September, mostly cloudy weather, light rain are expected in Donostia --- San Sebastián. The lowest air temperature will be +17°C at 11 pm, the highest temperature will be +20°C around 5 pm. The atmospheric pressure will be within 755-760 mm Hg. The relative humidity 74-88%. The wind will be mainly easterly 4 m/s with maximum gusts up to 8 m/s. Ultraviolet index 4, sun protection is required

On Thursday, 26 September, mostly partly cloudy, no precipitation are expected in Donostia --- San Sebastián. The lowest air temperature will be +17°C at 11 am, the highest temperature will be +18°C around 2 am. The atmospheric pressure will be within 753-757 mm Hg. The relative humidity 72-78%. The wind will be mainly southwesterly 5 m/s with maximum gusts up to 13 m/s. Ultraviolet index 4, sun protection is required

On Friday, 27 September, mostly cloudy weather, rain are expected in Donostia --- San Sebastián. The lowest air temperature will be +16°C at 5 am, the highest temperature will be +17°C around 2 pm. The atmospheric pressure will be within 757-764 mm Hg. The relative humidity 68-76%. The wind will be mainly southwesterly 3 m/s with maximum gusts up to 6 m/s. Ultraviolet index 1, no sun protection is required

On Saturday, 28 September, mostly partly cloudy, no precipitation are expected in Donostia --- San Sebastián. The lowest air temperature will be +16°C at 5 am, the highest temperature will be +18°C around 8 pm. The atmospheric pressure will be within 765-768 mm Hg. The relative humidity 65-73%. The wind will be mainly northeasterly 3 m/s with maximum gusts up to 4 m/s. Ultraviolet index 4, sun protection is required

On Sunday, 29 September, mostly partly cloudy weather, no precipitation are expected in Donostia --- San Sebastián. The lowest air temperature will be +18°C at 11 am, the highest temperature will be +22°C around 5 pm. The atmospheric pressure will be within 762-768 mm Hg. The relative humidity 69-73%. The wind will be mainly easterly 5 m/s with maximum gusts up to 9 m/s. Ultraviolet index 5, sun protection is required

On Monday, 30 September, mostly cloudy weather, light rain are expected in Donostia --- San Sebastián. The lowest air temperature will be +22°C at 2 am, the highest temperature will be +22°C around 2 am. The atmospheric pressure will be within 759-761 mm Hg. The relative humidity 68-70%. The wind will be mainly southerly 6 m/s with maximum gusts up to 10 m/s. Ultraviolet index 4, sun protection is required