San Sebastián
May
Weather in San Sebastián for May 2025
Your guide to San Sebastián weather in May - trends and predictions
In general, the average temperature in San Sebastián at the beginning of May is 14 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 17.6 °C by the end of May.
Expect significant rainfall in San Sebastián during May, with an average of 20 rainy days.
Is May a good time to visit San Sebastián? check out the best time to travel to San Sebastián page.
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11
Dry days
20
Rainy days
0
Snow days
16°/9°
Temperatures
14 km/h
Avg max wind
82 %
Avg humidity
San Sebastián in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  13° | 2  14° | 3 11° | 4  15° | |||
| 5 14° | 6  15° | 7  16° | 8  17° | 9  20° | 10  20° | 11 19° |
| 12 17° | 13 19° | 14 15° | 15 13° | 16 15° | 17 15° | 18 12° |
| 19 13° | 20 15° | 21 14° | 22 15° | 23 16° | 24 17° | 25 20° |
| 26 15° | 27 16° | 28 19° | 29  20° | 30 16° | 31 17° |
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Temperatures trend during May in San Sebastián
See the weather trend as well as the moving average line
May weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May | Patchy light rain with thunder | 13° /5° | 2.6 mm | 3 | |
| 2 May | Light drizzle | 14° /4° | 1.6 mm | 3 | |
| 3 May | Light drizzle | 11° /6° | 4.8 mm | 3 | |
| 4 May | Light rain shower | 15° /10° | 5.8 mm | 4 | |
| 5 May | Light rain shower | 14° /10° | 9.2 mm | 3 | |
| 6 May | Partly cloudy | 15° /7° | 0.1 mm | 5 | |
| 7 May | Mist | 16° /8° | 0.1 mm | 4 | |
| 8 May | Cloudy | 17° /8° | 0 mm | 4 | |
| 9 May | Overcast | 20° /10° | 0 mm | 5 | |
| 10 May | Moderate rain at times | 20° /13° | 5.1 mm | 5 | |
| 11 May | Patchy rain possible | 19° /12° | 0.4 mm | 4 | |
| 12 May | Mist | 17° /10° | 0 mm | 4 | |
| 13 May | Light rain shower | 19° /11° | 3.8 mm | 4 | |
| 14 May | Light rain shower | 15° /9° | 4.1 mm | 4 | |
| 15 May | Light rain shower | 13° /9° | 2.9 mm | 3 | |
| 16 May | Light drizzle | 15° /9° | 2.7 mm | 4 | |
| 17 May | Light rain shower | 15° /7° | 2.5 mm | 4 | |
| 18 May | Light rain shower | 12° /9° | 9.6 mm | 3 | |
| 19 May | Light rain shower | 13° /9° | 9.7 mm | 3 | |
| 20 May | Patchy rain possible | 15° /8° | 0.7 mm | 4 | |
| 21 May | Light rain shower | 14° /10° | 4.1 mm | 3 | |
| 22 May | Light rain shower | 15° /9° | 4 mm | 4 | |
| 23 May | Patchy rain possible | 16° /7° | 0.2 mm | 4 | |
| 24 May | Partly cloudy | 17° /10° | 0.1 mm | 5 | |
| 25 May | Patchy rain possible | 20° /11° | 0.8 mm | 5 | |
| 26 May | Patchy rain possible | 15° /12° | 0.3 mm | 4 | |
| 27 May | Patchy rain possible | 16° /9° | 0.4 mm | 4 | |
| 28 May | Partly cloudy | 19° /9° | 0 mm | 5 | |
| 29 May | Sunny | 20° /11° | 0 mm | 6 | |
| 30 May | Light rain shower | 16° /11° | 0.8 mm | 4 | |
| 31 May | Patchy rain possible | 17° /10° | 0.1 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for San Sebastián in May 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 San Sebastián forecast closer to your planned date for the most up-to-date weather information.
San Sebastián in May - FAQ
What are the expected maximum and minimum temperatures in San Sebastián during May?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in San Sebastián during May?
Moderate rainfall is anticipated in San Sebastián during May, with a total of 76.5 mm spread over approximately 20 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in San Sebastián during May?
The average wind speed in San Sebastián during May is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to San Sebastián in May?
As you prepare for your trip to San Sebastián in May, 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 San Sebastián, during May, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
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