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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 159 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
5
Dry days
Average rainy days
26
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/10°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
81 %
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 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 159 mm is expected in Donostia / San Sebastián during May, occurring over more than 26 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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