Climate averages 1991–2020
Donostia / San Sebastián weather
in May.
A mild, wet month: the 6th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Donostia / San Sebastián: daytime highs average 18.0°C and nights cool to about 12.0°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 117 mm of rain on roughly 15 days, which makes May a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 39 min on an average May day.
The nearest other city in this atlas is Pamplona (61 km away). In May its highs average 18.7°C, 0.7°C warmer than Donostia / San Sebastián, with 69 mm of rain.
Among the 93 cities listed in Spain, Donostia / San Sebastián ranks joint 83rd of 93 for the warmest May highs and 91st of 93 for the driest May (rainfall, lowest first). The mean May high of those 93 cities is 21.8°C; Donostia / San Sebastián is 3.8°C cooler than that mean.
From May to June, average highs rise by 2.6°C to 20.6°C, and monthly rainfall falls from 117 mm to 93 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Donostia / San Sebastián climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 11.2°C6.5°C | 6.5°C | 135 | 15.4 | 9.49 h |
| February | 11.6°C6.3°C | 6.3°C | 123 | 14.1 | 10.510 h |
| March | 13.7°C7.8°C | 7.8°C | 114 | 13.9 | 11.912 h |
| April | 15.1°C9.2°C | 9.2°C | 127 | 16.1 | 13.413 h |
| May, selected | 18.0°C12.0°C | 12.0°C | 117 | 15.4 | 14.715 h |
| June | 20.6°C14.7°C | 14.7°C | 93 | 12.7 | 15.315 h |
| July | 22.4°C16.7°C | 16.7°C | 82 | 12.6 | 15.115 h |
| August | 23.3°C17.4°C | 17.4°C | 89 | 12.9 | 14.014 h |
| September | 21.4°C15.6°C | 15.6°C | 96 | 12.9 | 12.513 h |
| October | 18.8°C13.3°C | 13.3°C | 128 | 14.3 | 11.111 h |
| November | 14.2°C9.6°C | 9.6°C | 170 | 15.7 | 9.810 h |
| December | 11.9°C7.5°C | 7.5°C | 138 | 15.1 | 9.09 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Pamplona in MaySpain · 61 kmHigh 18.7°C · Low 9.2°C · 69 mm rain
- Gasteiz / Vitoria in MaySpain · 77 kmHigh 18.0°C · Low 8.5°C · 71 mm rain
- Bilbao in MaySpain · 77 kmHigh 17.8°C · Low 12.1°C · 84 mm rain
- Barakaldo in MaySpain · 82 kmHigh 18.0°C · Low 12.0°C · 84 mm rain
- Logroño in MaySpain · 102 kmHigh 19.4°C · Low 9.3°C · 59 mm rain
- Pau in MayFrance · 131 kmHigh 18.8°C · Low 9.7°C · 159 mm rain
- Santander in MaySpain · 149 kmHigh 19.3°C · Low 11.6°C · 86 mm rain
- Burgos in MaySpain · 177 kmHigh 17.5°C · Low 7.3°C · 64 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Donostia / San Sebastián) is explained once on the Donostia / San Sebastián year overview and on the Sources, method and limits page.