Month guide · Jaca, Spain
Jaca in December: weather and what to expect
December highs in Jaca are now 1.2°C warmer than in 1991-2000. In December, Jaca averages highs of 8°C and lows of 1°C, with about 12 rainy days and 98 mm of rain. Highs are 3°C cooler than in November and 1°C warmer than in January. Crowds in Aragon are medium.
Is December a good time to visit?
Good for
No verdicts for Jaca in December yet. They only use climate values that are precise enough to judge with.
Not ideal for
- Reliable dry weatherAbout 12 rainy days in the month
- Warm-weather holidaysHighs of only 8°C
Daily highs through December
Town-level · ERA5-Land 1991-2020Highs fall about 1°C over the month. A day above 15°C happens in roughly 1 December in 3; nights below -5°C in about 1 in 2.
December in detail
Town-level · ERA5-LandCrowds, holidays and daylight
Public holidays in December 2026
- 7 Dec Monday following Constitution DayAragon
- 8 Dec Immaculate Conception
- 25 Dec Christmas Day
Local (municipal) holidays are not included.
Warmer in December
Where is warm in December →| Place | High | Rain days | From Jaca |
|---|---|---|---|
| Dolores, Valencian Community | 17°C | 4 | 493 km |
| Cox, Valencian Community | 17°C | 4 | 493 km |
| Benferri, Valencian Community | 16°C | 4 | 494 km |
| Albatera, Valencian Community | 16°C | 5 | 489 km |
| Granja de Rocamora, Valencian Community | 16°C | 5 | 492 km |
The nearest towns with a warmer December. Distances are in a straight line.
How December is changing
Town-level · ERA5-LandDecember highs are 1.2°C warmer than in 1991-2000, and December rainfall is down about 15% (2016-2025 against 1991-2000).
Questions about Jaca in December
Is December a good time to visit Jaca?
It is less suited to reliable dry weather (about 12 rainy days in the month); warm-weather holidays (highs of only 8°C).
How warm is Jaca in December?
Average highs are 8°C and lows 1°C. November averages 11°C and January 7°C.
Does it rain much in Jaca in December?
About 12 days have at least 1 mm of rain, with 98 mm in total over the month.
Is Jaca busy in December?
In December 2025, nights booked through online platforms in Aragon were about 55% of the busiest month, which we count as medium. The figure is for the whole region and leaves out hotels.
How long are the days in Jaca in December?
About 9 h 05 min from sunrise to sunset in the middle of the month.
Sources
Climate: ERA5-Land, Copernicus Climate Change Service (C3S) Climate Data Store, contains modified Copernicus information (CC BY 4.0). Crowds: Eurostat, nights spent in short-stay accommodation booked through online platforms (tour_ce_omn12) (CC BY 4.0). Place names and populations: GeoNames (CC BY 4.0). Climate averages cover 1991-2020. Daylight: calculated from the town's coordinates. Full methodology