Climatological averages, historical records, packing tips and best time to visit Barcelona during December. AEMET / ECMWF reanalysis 1991-2020.
Reference values based on 1991-2020 AEMET / ECMWF climatology. Year-to-year variation can be significant.
| Metric | Value | Date |
|---|---|---|
| All-time high | 39.8 °C | August 2010 |
| 24h rainfall | 156 mm | September 1962 |
| All-time low | -7.1 °C | January 1985 |
| Urban snowfall | 20 cm | March 2010 |
Official records (AEMET). Secondary stations may have more extreme readings.
In December, Barcelona typically shows mild cold and little rain. The average high temperature is around 15°C and the average low around 7°C, with monthly rainfall of 47 mm spread over roughly 6 rain days and about 141 hours of sunshine. Average relative humidity stands at 72% and wind speed averages 12 km/h.
The local calendar in December is shaped by Fira Santa Llucia and Nadal, so checking the forecast a few days in advance is worth it before any outdoor activity. Averages give a general picture but extreme events can vary widely: in December, Barcelona has recorded both unusually warm spells and cold incursions across recent decades.
For a typical stay we recommend medium coat and light scarf. UV protection is sensible on sunny days, even in a mild winter month, and a closed-toe waterproof shoe helps on damp days. For multi-day trips bring thin layers that you can combine through the day.
The first two weeks of December usually offer the best balance in Barcelona: moderate crowds, friendlier prices and weather that remains representative of the month. Late December starts showing features of the transition to the next month. Use our custom historical lookup to check the actual values for the exact year you plan to travel.
Of the twelve months, December is the 10th warmest in Barcelona and the 7th wettest. It collects 33 mm, 7 % of the whole year’s rain, spread over 6.2 days with appreciable precipitation, of which 0.9 exceed 10 mm. The warmest month is August and the wettest is October.
Among the 50 Spanish cities with AEMET climatological normals on this site, in December Barcelona is the 20th warmest, with a mean maximum of 14.9 °C, and the 41st wettest. The wettest of them that month is Vigo, with 231 mm against Barcelona’s 33 mm.
Averages hide what can actually happen. At the Barcelona, Port Olímpic observatory, a December has reached 21.7 °C as an absolute maximum and 1.1 °C as a minimum: that is the real range to reckon with, not the 11.9 °C mean. Relative humidity runs around — % and mean wind 9.7 km/h.
AEMET climatological normals 1991-2020, Barcelona, Port Olímpic observatory (26 m above sea level). Sources and methodology → · Forecast for Barcelona →
