Jaca climate — normals and trends
Jaca (Spain) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.2 °C and it receives 895 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (18.8 °C on average) and the coldest is January (1.1 °C). Rainfall peaks in December.
Jaca averages 92 frost days, 5 hot days (≥ 30 °C) and 125 rainy days per year.
Jaca has warmed by +3.0 °C between 1940 and 2025, or +0.35 °C per decade. This trend is statistically significant.
The number of frost days there went from about 118 to 66 per year over the period.
The hottest day of the period reached 36.3 °C (on 16 July 2022) and the coldest -21.1 °C (on 16 January 1985).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
JacaAragon
- coords
- 42.57°, -0.55°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.2°C
Average daily high
14.3°C
Average daily low
4.7°C
Annual rainfall
895mm
Sunshine / day
10.3h
Mean relative humidity
72%
Average peak wind
12.2km/h
Seasonal range
17.7°C
Frost days (< 0 °C)
92 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
125 d/yr
Annual snowfall
118.8 cm
Average feels-like high
12.4 °C
Average feels-like low
2.1 °C
Average peak gust
39.3 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
16.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.0 °C
since 1940
+0.4 °C per decade · r² = 0.67 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
36.3 °C
16 July 2022
Coldest day
-21.1 °C
16 January 1985
Wettest day
69 mm
27 June 1981
Windiest day
33.1 km/h
8 February 1996
Strongest gust
121.3 km/h
8 February 1996
Hottest feels-like
37.1 °C
17 July 2022
Coldest feels-like
-26.3 °C
16 January 1985
Snowiest day
26.0 cm
11 January 1979
Sunniest day
14.5 h
28 June 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 7.2 °C | +1.9 °C | 122 mm | +40 mm |
| Feb | 9.7 °C | +3.2 °C | 53 mm | -19 mm |
| Mar | 9.5 °C | -0.2 °C | 147 mm | +71 mm |
| Apr | 14.2 °C | +2.0 °C | 105 mm | +18 mm |
| May | 18.1 °C | +1.8 °C | 70 mm | -17 mm |
| Jun | 27.0 °C | +5.9 °C | 35 mm | -34 mm |
| Jul | 26.6 °C | +1.9 °C | 38 mm | -4 mm |
| Aug | 28.5 °C | +4.1 °C | 56 mm | +3 mm |
| Sep | 21.6 °C | +1.0 °C | 41 mm | -26 mm |
| Oct | 18.0 °C | +2.7 °C | 49 mm | -38 mm |
| Nov | 10.3 °C | +0.8 °C | 96 mm | +10 mm |
| Dec | 8.0 °C | +1.9 °C | 62 mm | -25 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Jaca?
Jaca has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.2 °C and it receives 895 mm of precipitation per year.
What is the hottest day ever recorded in Jaca?
The hottest day measured in Jaca between 1940 and 2025 was 16 July 2022, reaching 36.3 °C.
What is the coldest day in Jaca?
The coldest day measured in Jaca between 1940 and 2025 was 16 January 1985, at -21.1 °C.
Does it snow in Jaca?
Yes. Jaca gets on average 118.8 cm of snow per year and has around 92 frost days.
Has the climate of Jaca warmed?
Yes: Jaca warmed by +3.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Jaca?
The wettest day measured in Jaca between 1940 and 2025 was 27 June 1981, with 69 mm of rain in 24 hours.
What was the windiest day in Jaca?
The windiest day measured in Jaca between 1940 and 2025 was 8 February 1996, with winds reaching 33.1 km/h.
What is the warmest month in Jaca?
The warmest month in Jaca is July (18.8 °C on average); the coldest is January (1.1 °C).
How much does it rain in Jaca?
Jaca receives on average 895 mm of precipitation per year, spread over about 125 rainy days.
Is it sunny in Jaca?
Jaca gets on average 10.3 hours of sunshine per day, roughly 3,760 hours per year over 1940-2025.
What is the biggest single-day snowfall in Jaca?
The heaviest 24-hour snowfall measured in Jaca between 1940 and 2025 was 11 January 1979, with 26.0 cm.
Are there tropical nights in Jaca?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Jaca.
What was the most extreme apparent temperature in Jaca?
In Jaca, between 1940 and 2025, the highest apparent temperature reached 37.1 °C on 17 July 2022, and the lowest was -26.3 °C on 16 January 1985.
Compare Jaca with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Jaca