Climate averages 1991–2020
Bilbao weather
in December.
A cool, wet month: the 10th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cool month in Bilbao: daytime highs average 12.6°C and nights cool to about 8.1°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 105 mm of rain on roughly 14 days, which makes December a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 03 min on an average December day.
The nearest other city in this atlas is Barakaldo (6 km away). In December its highs average 12.7°C, about as warm as Bilbao, with 105 mm of rain.
Among the 93 cities listed in Spain, Bilbao ranks joint 53rd of 93 for the warmest December highs and joint 80th of 93 for the driest December (rainfall, lowest first). The mean December high of those 93 cities is 13.1°C; Bilbao is 0.5°C cooler than that mean.
From December to January, average highs fall by 0.7°C to 11.9°C, and monthly rainfall rises from 105 mm to 112 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
Bilbao climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 11.9°C7.2°C | 7.2°C | 112 | 14.8 | 9.49 h |
| February | 12.1°C6.9°C | 6.9°C | 101 | 13.8 | 10.510 h |
| March | 14.0°C8.2°C | 8.2°C | 98 | 13.5 | 11.912 h |
| April | 15.1°C9.5°C | 9.5°C | 97 | 15.2 | 13.413 h |
| May | 17.8°C12.1°C | 12.1°C | 84 | 14.2 | 14.715 h |
| June | 20.3°C14.9°C | 14.9°C | 69 | 11.4 | 15.315 h |
| July | 22.3°C16.9°C | 16.9°C | 60 | 10.4 | 15.015 h |
| August | 23.2°C17.6°C | 17.6°C | 55 | 10.3 | 14.014 h |
| September | 21.5°C15.9°C | 15.9°C | 65 | 11.8 | 12.513 h |
| October | 19.1°C13.7°C | 13.7°C | 97 | 13.9 | 11.111 h |
| November | 14.8°C10.2°C | 10.2°C | 135 | 15.6 | 9.810 h |
| December, selected | 12.6°C8.1°C | 8.1°C | 105 | 14.4 | 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
- Barakaldo in DecemberSpain · 6 kmHigh 12.7°C · Low 7.9°C · 105 mm rain
- Gasteiz / Vitoria in DecemberSpain · 50 kmHigh 9.1°C · Low 2.1°C · 70 mm rain
- Santander in DecemberSpain · 75 kmHigh 13.3°C · Low 7.1°C · 114 mm rain
- Donostia / San Sebastián in DecemberSpain · 77 kmHigh 11.9°C · Low 7.5°C · 138 mm rain
- Logroño in DecemberSpain · 97 kmHigh 9.9°C · Low 2.8°C · 49 mm rain
- Pamplona in DecemberSpain · 115 kmHigh 8.9°C · Low 2.4°C · 66 mm rain
- Burgos in DecemberSpain · 120 kmHigh 7.5°C · Low 1.1°C · 56 mm rain
- Palencia in DecemberSpain · 191 kmHigh 8.6°C · Low 1.7°C · 46 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 Bilbao) is explained once on the Bilbao year overview and on the Sources, method and limits page.
Barakaldo lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.