Gipuzkoa (Donostia / San Sebastián)
September
Weather in Gipuzkoa for September 2026
Your guide to Gipuzkoa weather in September - trends and predictions
In general, the average temperature in Gipuzkoa at the beginning of September is 24.3 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 21.4 °C by the end of September.
Gipuzkoa experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 171 mm.
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Temperatures
Rain 🌧️
More
9
Dry days
21
Rainy days
0
Snow days
22°/15°
Temperatures
15 km/h
Avg max wind
76 %
Avg humidity
Gipuzkoa Weather September
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Temperatures trend during September in Gipuzkoa
See the weather trend as well as the moving average line
September weather in Gipuzkoa day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy light rain with thunder | 22° /15° | 7 mm | 5 | |
| 2 Sept. |  Moderate or heavy rain shower | 23° /16° | 20.3 mm | 5 | |
| 3 Sept. |  Cloudy | 25° /16° | 3.2 mm | 5 | |
| 4 Sept. |  Light rain shower | 24° /17° | 3.9 mm | 6 | |
| 5 Sept. |  Partly cloudy | 24° /15° | 2.5 mm | 6 | |
| 6 Sept. |  Sunny | 26° /16° | 12.2 mm | 7 | |
| 7 Sept. | Partly cloudy | 26° /17° | 1.2 mm | 7 | |
| 8 Sept. | Patchy rain possible | 23° /15° | 4.9 mm | 5 | |
| 9 Sept. | Light rain shower | 23° /15° | 2.9 mm | 5 | |
| 10 Sept. | Patchy rain possible | 22° /15° | 3.2 mm | 5 | |
| 11 Sept. | Moderate or heavy rain shower | 23° /15° | 19.6 mm | 5 | |
| 12 Sept. | Cloudy | 20° /15° | 11.6 mm | 4 | |
| 13 Sept. | Light rain shower | 19° /14° | 1.7 mm | 4 | |
| 14 Sept. | Cloudy | 22° /13° | 0 mm | 5 | |
| 15 Sept. | Sunny | 22° /14° | 0.8 mm | 6 | |
| 16 Sept. | Partly cloudy | 23° /14° | 0.2 mm | 6 | |
| 17 Sept. |  Patchy light drizzle | 24° /14° | 0.6 mm | 6 | |
| 18 Sept. | Light rain shower | 25° /14° | 0.4 mm | 7 | |
| 19 Sept. | Patchy rain possible | 26° /16° | 0.3 mm | 6 | |
| 20 Sept. | Sunny | 25° /15° | 4.6 mm | 6 | |
| 21 Sept. | Light rain shower | 21° /14° | 12.7 mm | 5 | |
| 22 Sept. | Light rain shower | 18° /12° | 11.3 mm | 4 | |
| 23 Sept. | Light rain shower | 18° /11° | 3 mm | 4 | |
| 24 Sept. | Sunny | 22° /12° | 2.3 mm | 5 | |
| 25 Sept. | Sunny | 22° /12° | 0.8 mm | 6 | |
| 26 Sept. | Patchy rain possible | 21° /13° | 3.8 mm | 5 | |
| 27 Sept. |  Overcast | 21° /12° | 4.4 mm | 5 | |
| 28 Sept. | Sunny | 21° /13° | 4.9 mm | 6 | |
| 29 Sept. | Partly cloudy | 21° /13° | 0 mm | 5 | |
| 30 Sept. | Partly cloudy | 22° /13° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Gipuzkoa in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Gipuzkoa forecast closer to your planned date for the most up-to-date weather information.
Change Month
Gipuzkoa weather in September vs August vs October
Compare September weather in Gipuzkoa with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
| August | September | October | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 23°/16° | 22°/15° | 20°/13° |
| Rainfall | 136 mm | 171 mm | 131 mm |
| Wind | 13.7 km/h | 14.5 km/h | 17.7 km/h |
| Humidity | 79% | 76% | 74% |
| Rainy days | 19 days | 21 days | 20 days |
| Dry days | 12 days | 9 days | 11 days |
Planning a trip to Gipuzkoa? Discover the best time to visit
Gipuzkoa in September - FAQ
What are the expected maximum and minimum temperatures in Gipuzkoa during September?
During September, expect a variety of temperatures with highs around 22° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Gipuzkoa during September?
Significant rainfall exceeding 171 mm is expected in Gipuzkoa during September, occurring over more than 21 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Gipuzkoa during September?
The average wind speed in Gipuzkoa during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Gipuzkoa in September?
As you prepare for your trip to Gipuzkoa 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 Gipuzkoa, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Layered Clothing: Light sweaters, long-sleeve shirts, light jackets, and comfortable pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Gipuzkoa
Explore the daily rainfall trends and prepare for Gipuzkoas September weather 💧
Typically, Gipuzkoa has 21 rainy days in September with a total of 171 mm of rainfall.
UV exposure in Gipuzkoa during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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