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Weather in Donostia / San Sebastián for May 2026

Your guide to Donostia / San Sebastián weather in May - trends and predictions

    Temperatures

  • In general, the average temperature in Donostia / San Sebastián at the beginning of May is 18.6 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 20.3 °C by the end of May.

    • Rain 🌧️

  • Donostia / San Sebastián experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 140.3 mm.

    • More

  • Is May a good time to visit Donostia / San Sebastián? check out the best time to travel to Donostia / San Sebastián page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
6
Dry days
Average rainy days
25
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/10°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
80 %
Avg humidity

Donostia / San Sebastián Weather May

Move between months or click on a day
April
June
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy rain possible
17°
2
Partly cloudy
19°
3
Cloudy
23°
4
Partly cloudy
20°
5
Light rain shower
19°
6
Light rain shower
16°
7
Patchy rain possible
16°
8
Patchy rain possible
17°
9
Moderate or heavy rain shower
18°
10
Heavy rain at times
20°
11
Moderate or heavy rain shower
18°
12
Moderate or heavy rain shower
16°
13
Moderate or heavy rain shower
19°
14
Light rain shower
16°
15
Heavy rain at times
15°
16
Moderate or heavy rain shower
16°
17
Partly cloudy
17°
18
Patchy rain possible
19°
19
Patchy rain possible
16°
20
Heavy rain at times
17°
21
Patchy rain possible
17°
22
Patchy rain possible
16°
23
Heavy rain at times
16°
24
Patchy rain possible
17°
25
Cloudy
19°
26
Patchy rain possible
19°
27
Sunny
20°
28
Partly cloudy
21°
29
Cloudy
22°
30
Moderate rain at times
21°
31
Cloudy
20°

Temperatures trend during May in Donostia / San Sebastián

See the weather trend as well as the moving average line

May weather in Donostia / San Sebastián day by day

Click on a date for more information
April June
Date Weather Temperatures Rain UV More
1 May Patchy rain possible
Patchy rain possible
 17° /10° 13 mm 4
2 May Partly cloudy
Partly cloudy
 19° /8° 2.4 mm 5
3 May Cloudy
Cloudy
 23° /9° 1.1 mm 5
4 May Partly cloudy
Partly cloudy
 20° /11° 5 mm 5
5 May Light rain shower
Light rain shower
 19° /10° 5.3 mm 5
6 May Light rain shower
Light rain shower
 16° /9° 3.6 mm 3
7 May Patchy rain possible
Patchy rain possible
 16° /9° 2.3 mm 4
8 May Patchy rain possible
Patchy rain possible
 17° /9° 0.3 mm 4
9 May Moderate or heavy rain shower
Moderate or heavy rain shower
 18° /10° 5 mm 4
10 May Heavy rain at times
Heavy rain at times
 20° /10° 3.9 mm 5
11 May Moderate or heavy rain shower
Moderate or heavy rain shower
 18° /10° 15.5 mm 4
12 May Moderate or heavy rain shower
Moderate or heavy rain shower
 16° /9° 7.6 mm 4
13 May Moderate or heavy rain shower
Moderate or heavy rain shower
 19° /9° 11.1 mm 4
14 May Light rain shower
Light rain shower
 16° /10° 11 mm 4
15 May Heavy rain at times
Heavy rain at times
 15° /10° 5.8 mm 3
16 May Moderate or heavy rain shower
Moderate or heavy rain shower
 16° /9° 4.7 mm 4
17 May Partly cloudy
Partly cloudy
 17° /9° 2.7 mm 5
18 May Patchy rain possible
Patchy rain possible
 19° /10° 1.1 mm 5
19 May Patchy rain possible
Patchy rain possible
 16° /11° 14.9 mm 4
20 May Heavy rain at times
Heavy rain at times
 17° /10° 5.5 mm 4
21 May Patchy rain possible
Patchy rain possible
 17° /9° 2.1 mm 4
22 May Patchy rain possible
Patchy rain possible
 16° /10° 4.9 mm 4
23 May Heavy rain at times
Heavy rain at times
 16° /11° 4.1 mm 4
24 May Patchy rain possible
Patchy rain possible
 17° /10° 1.3 mm 4
25 May Cloudy
Cloudy
 19° /10° 2 mm 4
26 May Patchy rain possible
Patchy rain possible
 19° /10° 0.8 mm 4
27 May Sunny
Sunny
 20° /11° 0.6 mm 5
28 May Partly cloudy
Partly cloudy
 21° /11° 0.1 mm 5
29 May Cloudy
Cloudy
 22° /12° 0 mm 6
30 May Moderate rain at times
Moderate rain at times
 21° /13° 1.8 mm 5
31 May Cloudy
Cloudy
 20° /13° 0.8 mm 5
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Important Notice
Our weather forecast for Donostia / 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 Donostia / San Sebastián forecast closer to your planned date for the most up-to-date weather information.
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Donostia / San Sebastián weather in May vs April vs June

Compare May weather in Donostia / 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.
AprilMayJune
WeatherPatchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Temperatures16°/8°18°/10°22°/15°
Rainfall99 mm140 mm125 mm
Wind16.5 km/h14.7 km/h12.5 km/h
Humidity77%80%81%
Rainy days21 days25 days24 days
Dry days9 days6 days6 days

Planning a trip to Donostia / San Sebastián? Discover the best time to visit

Donostia / San Sebastián in May - FAQ

What are the expected maximum and minimum temperatures in Donostia / San Sebastián during May?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Donostia / San Sebastián during May?
Significant rainfall exceeding 140.3 mm is expected in Donostia / San Sebastián during May, occurring over more than 25 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Donostia / San Sebastián during May?
The average wind speed in Donostia / San Sebastián during May is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Donostia / San Sebastián in May?

As you prepare for your trip to Donostia / 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 Donostia / 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 Donostia / San Sebastián

Explore the daily rainfall trends and prepare for Donostia / San Sebastiáns May weather 💧

UV exposure in Donostia / San Sebastián during May

Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️

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Location coordinates 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.

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