San Sebastián
May
Weather in San Sebastián for May 2026
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 15.9 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 18.6 °C by the end of May.
San Sebastián in May brings notable rainfall, with an average of 20 rainy days and a total precipitation of 114.6 mm.
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Temperatures
Rain 🌧️
More
11
Dry days
20
Rainy days
0
Snow days
17°/11°
Temperatures
13 km/h
Avg max wind
79 %
Avg humidity
San Sebastián Weather May
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Temperatures trend during May in San Sebastián
See the weather trend as well as the moving average line
May weather in San Sebastián day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Light rain shower | 15° /10° | 6.3 mm | 4 | |
| 2 May | Patchy rain possible | 17° /9° | 3.2 mm | 4 | |
| 3 May | Patchy rain possible | 17° /9° | 0.6 mm | 4 | |
| 4 May | Patchy rain possible | 18° /12° | 2.4 mm | 4 | |
| 5 May | Light rain shower | 16° /9° | 11.4 mm | 4 | |
| 6 May | Patchy rain possible | 13° /9° | 2.8 mm | 3 | |
| 7 May | Patchy rain possible | 15° /8° | 0.2 mm | 4 | |
| 8 May |  Overcast | 17° /8° | 0 mm | 4 | |
| 9 May |  Sunny | 18° /9° | 3.3 mm | 5 | |
| 10 May | Sunny | 19° /12° | 2.3 mm | 5 | |
| 11 May |  Patchy light rain with thunder | 19° /11° | 8 mm | 5 | |
| 12 May | Patchy rain possible | 17° /11° | 1.7 mm | 4 | |
| 13 May |  Moderate rain | 18° /10° | 8.1 mm | 5 | |
| 14 May | Light rain shower | 14° /10° | 19.1 mm | 3 | |
| 15 May | Light rain shower | 13° /9° | 18.6 mm | 3 | |
| 16 May | Light rain shower | 16° /9° | 1.5 mm | 4 | |
| 17 May | Patchy rain possible | 16° /8° | 2.2 mm | 4 | |
| 18 May | Light rain shower | 19° /11° | 4.1 mm | 5 | |
| 19 May | Light rain shower | 15° /11° | 3.4 mm | 4 | |
| 20 May | Patchy rain possible | 16° /11° | 0.4 mm | 5 | |
| 21 May | Light rain shower | 17° /11° | 3.2 mm | 4 | |
| 22 May | Light rain shower | 15° /11° | 4.9 mm | 4 | |
| 23 May | Sunny | 17° /9° | 0.2 mm | 5 | |
| 24 May |  Partly cloudy | 17° /10° | 0.1 mm | 5 | |
| 25 May | Partly cloudy | 19° /12° | 0.3 mm | 5 | |
| 26 May | Patchy rain possible | 16° /12° | 0.9 mm | 4 | |
| 27 May | Light rain shower | 17° /11° | 0.6 mm | 5 | |
| 28 May | Sunny | 20° /11° | 0 mm | 6 | |
| 29 May | Partly cloudy | 22° /13° | 0 mm | 6 | |
| 30 May | Light rain shower | 19° /14° | 4.4 mm | 5 | |
| 31 May | Patchy rain possible | 17° /12° | 0.4 mm | 4 | |
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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.
Change Month
San Sebastián weather in May vs April vs June
Compare May weather in San Sebastián with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
| April | May | June | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 15°/9° | 17°/11° | 21°/15° |
| Rainfall | 62 mm | 115 mm | 70 mm |
| Wind | 16.2 km/h | 12.8 km/h | 12.8 km/h |
| Humidity | 74% | 79% | 80% |
| Rainy days | 19 days | 20 days | 19 days |
| Dry days | 11 days | 11 days | 11 days |
Planning a trip to San Sebastián? Discover the best time to visit
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 17° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in San Sebastián during May?
Significant rainfall exceeding 114.6 mm is expected in San Sebastián during May, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in San Sebastián during May?
The average wind speed in San Sebastián during May is 13 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
May rainfall patterns in San Sebastián
Explore the daily rainfall trends and prepare for San Sebastiáns May weather 💧
UV exposure in San Sebastián during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
Quick links
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Where is San Sebastián?Get accurate weather forecasts for San Sebastián, located at latitude 43.201 and longitude -4.423. Stay updated with localized weather information tailored for San Sebastián.
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