Kalajoki climate — normals and trends
Kalajoki (Finland) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is 3.4 °C and it receives 548 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 (16.6 °C on average) and the coldest is January (-8.3 °C). Rainfall peaks in August.
Kalajoki averages 172 frost days, 1 hot days (≥ 30 °C) and 119 rainy days per year.
Kalajoki has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The number of frost days there went from about 184 to 160 per year over the period.
The hottest day of the period reached 33.3 °C (on 31 July 2018) and the coldest -37.7 °C (on 30 January 1956).
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
KalajokiNorth Ostrobothnia
- coords
- 64.25°, 23.95°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
3.4°C
Average daily high
6.7°C
Average daily low
-0.2°C
Annual rainfall
548mm
Sunshine / day
7.3h
Mean relative humidity
79%
Average peak wind
17.3km/h
Seasonal range
24.9°C
Frost days (< 0 °C)
172 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
119 d/yr
Annual snowfall
111.5 cm
Average feels-like high
3.2 °C
Average feels-like low
-4.0 °C
Average peak gust
36.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
8.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.25 · 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
33.3 °C
31 July 2018
Coldest day
-37.7 °C
30 January 1956
Wettest day
49 mm
29 July 1992
Windiest day
51.2 km/h
26 December 1992
Strongest gust
108.4 km/h
26 December 1992
Hottest feels-like
34.1 °C
29 July 2010
Coldest feels-like
-42.7 °C
30 January 1956
Snowiest day
16.9 cm
4 November 1968
Sunniest day
19.3 h
10 June 2023
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -2.8 °C | +2.9 °C | 51 mm | +20 mm |
| Feb | -1.3 °C | +4.2 °C | 17 mm | -8 mm |
| Mar | 3.9 °C | +4.6 °C | 31 mm | +4 mm |
| Apr | 7.6 °C | +2.0 °C | 14 mm | -18 mm |
| May | 12.1 °C | -0.5 °C | 34 mm | -8 mm |
| Jun | 16.4 °C | -1.5 °C | 72 mm | +17 mm |
| Jul | 24.8 °C | +4.1 °C | 78 mm | +8 mm |
| Aug | 18.8 °C | +0.2 °C | 85 mm | +12 mm |
| Sep | 16.9 °C | +3.9 °C | 101 mm | +42 mm |
| Oct | 8.7 °C | +2.5 °C | 51 mm | +3 mm |
| Nov | 2.4 °C | +1.8 °C | 44 mm | +1 mm |
| Dec | 1.1 °C | +4.1 °C | 67 mm | +28 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 Kalajoki?
Kalajoki has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is 3.4 °C and it receives 548 mm of precipitation per year.
What is the hottest day ever recorded in Kalajoki?
The hottest day measured in Kalajoki between 1940 and 2025 was 31 July 2018, reaching 33.3 °C.
What is the coldest day in Kalajoki?
The coldest day measured in Kalajoki between 1940 and 2025 was 30 January 1956, at -37.7 °C.
Does it snow in Kalajoki?
Yes. Kalajoki gets on average 111.5 cm of snow per year and has around 172 frost days.
Has the climate of Kalajoki warmed?
Yes: Kalajoki warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Kalajoki?
The wettest day measured in Kalajoki between 1940 and 2025 was 29 July 1992, with 49 mm of rain in 24 hours.
What was the windiest day in Kalajoki?
The windiest day measured in Kalajoki between 1940 and 2025 was 26 December 1992, with winds reaching 51.2 km/h.
What is the warmest month in Kalajoki?
The warmest month in Kalajoki is July (16.6 °C on average); the coldest is January (-8.3 °C).
How much does it rain in Kalajoki?
Kalajoki receives on average 548 mm of precipitation per year, spread over about 119 rainy days.
Is it sunny in Kalajoki?
Kalajoki gets on average 7.3 hours of sunshine per day, roughly 2,665 hours per year over 1940-2025.
What is the biggest single-day snowfall in Kalajoki?
The heaviest 24-hour snowfall measured in Kalajoki between 1940 and 2025 was 4 November 1968, with 16.9 cm.
Are there tropical nights in Kalajoki?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Kalajoki.
What was the most extreme apparent temperature in Kalajoki?
In Kalajoki, between 1940 and 2025, the highest apparent temperature reached 34.1 °C on 29 July 2010, and the lowest was -42.7 °C on 30 January 1956.
Compare Kalajoki with another city
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Nearby cities
The climate around Kalajoki