Weather in Donostia / San Sebastián for September 2027
In general, the average temperature in Donostia / San Sebastián at the beginning of September is 24.6 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 22.5 °C by the end of September.
The climate of Donostia / San Sebastián in September is notably wet, with an average of 13 rainy days, and a total of 120.5 mm of precipitation.
Is September a good time to visit Donostia / San Sebastián? check out the best time to travel to Donostia / San Sebastián page.
✨ Is September a good time to visit Donostia / San Sebastián? – Ask the AI Weatherman
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Donostia / San Sebastián Weather September
Temperatures trend during September in Donostia / San Sebastián
September weather in Donostia / San Sebastián day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy light rain with thunder | 22° /15° | 5.3 mm | 5 | |
| 2 Sept. |  Moderate rain | 23° /16° | 15.3 mm | 6 | |
| 3 Sept. |  Patchy rain possible | 25° /16° | 2.4 mm | 6 | |
| 4 Sept. |  Light rain | 25° /17° | 2.9 mm | 6 | |
| 5 Sept. | Patchy rain possible | 24° /16° | 1.9 mm | 5 | |
| 6 Sept. | Light rain | 28° /18° | 9.2 mm | 6 | |
| 7 Sept. | Patchy rain possible | 25° /17° | 1 mm | 6 | |
| 8 Sept. | Light rain | 23° /15° | 4.9 mm | 5 | |
| 9 Sept. | Light rain | 22° /15° | 5.6 mm | 5 | |
| 10 Sept. | Patchy rain possible | 22° /14° | 2.4 mm | 5 | |
| 11 Sept. | Moderate rain | 22° /14° | 14.7 mm | 5 | |
| 12 Sept. | Light rain | 20° /14° | 8.7 mm | 5 | |
| 13 Sept. | Light rain shower | 20° /14° | 1.3 mm | 5 | |
| 14 Sept. |  Cloudy | 24° /13° | 0 mm | 5 | |
| 15 Sept. |  Sunny | 22° /15° | 0.8 mm | 6 | |
| 16 Sept. | Patchy rain possible | 22° /14° | 1.9 mm | 5 | |
| 17 Sept. | Patchy light drizzle | 23° /15° | 1.2 mm | 5 | |
| 18 Sept. | Light rain shower | 23° /14° | 0.6 mm | 5 | |
| 19 Sept. | Patchy rain possible | 25° /15° | 0.2 mm | 5 | |
| 20 Sept. | Light rain | 25° /15° | 3.5 mm | 5.8 | |
| 21 Sept. | Light rain | 21° /14° | 9.6 mm | 4 | |
| 22 Sept. | Light rain | 19° /13° | 8.5 mm | 4 | |
| 23 Sept. | Light rain shower | 20° /12° | 2.3 mm | 4 | |
| 24 Sept. | Patchy rain possible | 24° /13° | 1.7 mm | 5 | |
| 25 Sept. | Patchy rain possible | 22° /13° | 0.6 mm | 5 | |
| 26 Sept. | Light rain | 21° /14° | 3 mm | 4 | |
| 27 Sept. | Light rain | 23° /13° | 3.3 mm | 4 | |
| 28 Sept. | Light rain | 23° /14° | 3.9 mm | 5 | |
| 29 Sept. |  Partly cloudy | 23° /14° | 0.1 mm | 4 | |
| 30 Sept. | Light rain | 23° /14° | 3.9 mm | 4.9 | |
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Donostia / San Sebastián weather in September vs August vs October
| August | September | October | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 24°/17° | 23°/14° | 20°/13° |
| Rainfall | 96 mm | 121 mm | 114 mm |
| Wind | 13.8 km/h | 13.7 km/h | 15.6 km/h |
| Humidity | 79% | 76% | 76% |
| Rainy days | 13 days | 13 days | 13 days |
| Dry days | 18 days | 17 days | 18 days |
Planning a trip to Donostia / San Sebastián? Discover the best time to visit
Donostia / San Sebastián in September - FAQ
What are the expected maximum and minimum temperatures in Donostia / San Sebastián during September?
How much rainfall should be expected in Donostia / San Sebastián during September?
What are the typical wind conditions in Donostia / San Sebastián during September?
September rainfall patterns in Donostia / San Sebastián
UV exposure in Donostia / San Sebastián during September
What to pack to Donostia / San Sebastián in September?
Mild & changeable · highs around 23 °C, frequent showers
As you prepare for your trip to Donostia / San Sebastián in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Donostia / San Sebastián, during September, is comfortable and enjoyable, regardless of the weather conditions.
🧥 Clothing
👟 Footwear
🎒 Accessories
Where is Donostia / San Sebastián?Get accurate weather forecasts for Donostia / San Sebastián, located at latitude 43.313 and longitude -1.975. Stay updated with localized weather information tailored for Donostia / San Sebastián.