Climate averages 1991–2020
Donostia / San Sebastián weather
in December.
A cool, wet month: the 10th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cool month in Donostia / San Sebastián: daytime highs average 11.9°C and nights cool to about 7.5°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 138 mm of rain on roughly 15 days, which makes December a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 02 min on an average December day.
The nearest other city in this atlas is Pamplona (61 km away). In December its highs average 8.9°C, 3.0°C cooler than Donostia / San Sebastián, with 66 mm of rain.
Among the 93 cities listed in Spain, Donostia / San Sebastián ranks 60th of 93 for the warmest December highs and 89th of 93 for the driest December (rainfall, lowest first). The mean December high of those 93 cities is 13.1°C; Donostia / San Sebastián is 1.2°C cooler than that mean.
From December to January, average highs fall by 0.7°C to 11.2°C, and monthly rainfall falls from 138 mm to 135 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Pamplona in DecemberSpain · 61 kmHigh 8.9°C · Low 2.4°C · 66 mm rain
- Gasteiz / Vitoria in DecemberSpain · 77 kmHigh 9.1°C · Low 2.1°C · 70 mm rain
- Bilbao in DecemberSpain · 77 kmHigh 12.6°C · Low 8.1°C · 105 mm rain
- Barakaldo in DecemberSpain · 82 kmHigh 12.7°C · Low 7.9°C · 105 mm rain
- Logroño in DecemberSpain · 102 kmHigh 9.9°C · Low 2.8°C · 49 mm rain
- Pau in DecemberFrance · 131 kmHigh 10.1°C · Low 2.6°C · 108 mm rain
- Santander in DecemberSpain · 149 kmHigh 13.3°C · Low 7.1°C · 114 mm rain
- Burgos in DecemberSpain · 177 kmHigh 7.5°C · Low 1.1°C · 56 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.