Galdakao climate — normals and trends
Galdakao (Spain) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 13.0 °C and it receives 1,163 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 August (18.9 °C on average) and the coldest is January (7.7 °C). Rainfall peaks in November.
Galdakao averages 4 frost days, 1 hot days (≥ 30 °C) and 168 rainy days per year.
Galdakao has warmed by +1.8 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The number of frost days there went from about 8 to 0 per year over the period.
The hottest day of the period reached 34.5 °C (on 18 June 2022) and the coldest -8.7 °C (on 18 January 1957).
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
GaldakaoBasque Country
- coords
- 43.23°, -2.84°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
13.0°C
Average daily high
16.0°C
Average daily low
10.4°C
Annual rainfall
1,163mm
Sunshine / day
8.9h
Mean relative humidity
80%
Average peak wind
17.3km/h
Seasonal range
11.2°C
Frost days (< 0 °C)
4 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
168 d/yr
Annual snowfall
12.3 cm
Average feels-like high
14.9 °C
Average feels-like low
8.4 °C
Average peak gust
36.9 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
13.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.56 · 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
34.5 °C
18 June 2022
Coldest day
-8.7 °C
18 January 1957
Wettest day
70 mm
10 June 1966
Windiest day
54.1 km/h
29 December 1951
Strongest gust
128.9 km/h
29 December 1951
Hottest feels-like
38.7 °C
18 June 2022
Coldest feels-like
-13.6 °C
18 January 1940
Snowiest day
15.8 cm
5 January 1945
Sunniest day
14.8 h
5 July 2025
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 | 13.1 °C | +2.8 °C | 136 mm | +17 mm |
| Feb | 14.2 °C | +3.1 °C | 62 mm | -42 mm |
| Mar | 13.0 °C | +0.1 °C | 113 mm | +14 mm |
| Apr | 16.9 °C | +2.8 °C | 93 mm | -16 mm |
| May | 17.9 °C | +1.2 °C | 110 mm | +13 mm |
| Jun | 23.0 °C | +3.6 °C | 76 mm | +1 mm |
| Jul | 22.6 °C | +1.1 °C | 69 mm | +11 mm |
| Aug | 24.4 °C | +2.2 °C | 53 mm | -10 mm |
| Sep | 21.5 °C | +0.7 °C | 76 mm | -4 mm |
| Oct | 19.9 °C | +2.0 °C | 40 mm | -64 mm |
| Nov | 15.4 °C | +1.9 °C | 170 mm | +38 mm |
| Dec | 12.9 °C | +1.9 °C | 86 mm | -38 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 Galdakao?
Galdakao has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 13.0 °C and it receives 1,163 mm of precipitation per year.
What is the hottest day ever recorded in Galdakao?
The hottest day measured in Galdakao between 1940 and 2025 was 18 June 2022, reaching 34.5 °C.
What is the coldest day in Galdakao?
The coldest day measured in Galdakao between 1940 and 2025 was 18 January 1957, at -8.7 °C.
Does it snow in Galdakao?
Yes. Galdakao gets on average 12.3 cm of snow per year and has around 4 frost days.
Has the climate of Galdakao warmed?
Yes: Galdakao warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Galdakao?
The wettest day measured in Galdakao between 1940 and 2025 was 10 June 1966, with 70 mm of rain in 24 hours.
What was the windiest day in Galdakao?
The windiest day measured in Galdakao between 1940 and 2025 was 29 December 1951, with winds reaching 54.1 km/h.
What is the warmest month in Galdakao?
The warmest month in Galdakao is August (18.9 °C on average); the coldest is January (7.7 °C).
How much does it rain in Galdakao?
Galdakao receives on average 1,163 mm of precipitation per year, spread over about 168 rainy days.
Is it sunny in Galdakao?
Galdakao gets on average 8.9 hours of sunshine per day, roughly 3,249 hours per year over 1940-2025.
What is the biggest single-day snowfall in Galdakao?
The heaviest 24-hour snowfall measured in Galdakao between 1940 and 2025 was 5 January 1945, with 15.8 cm.
Are there tropical nights in Galdakao?
Yes: Galdakao has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Galdakao?
In Galdakao, between 1940 and 2025, the highest apparent temperature reached 38.7 °C on 18 June 2022, and the lowest was -13.6 °C on 18 January 1940.
Compare Galdakao with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Galdakao