Haapajärvi climate — normals and trends
Haapajärvi (Finland) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is 2.8 °C and it receives 609 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 (16.2 °C on average) and the coldest is January (-9.5 °C). Rainfall peaks in August.
Haapajärvi averages 182 frost days, 0 hot days (≥ 30 °C) and 128 rainy days per year.
Haapajärvi has warmed by +2.1 °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 192 to 172 per year over the period.
The hottest day of the period reached 34.6 °C (on 29 July 2010) and the coldest -40.9 °C (on 7 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
HaapajärviNorth Ostrobothnia
- coords
- 63.75°, 25.33°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
2.8°C
Average daily high
6.2°C
Average daily low
-0.9°C
Annual rainfall
609mm
Sunshine / day
6.8h
Mean relative humidity
80%
Average peak wind
15.5km/h
Seasonal range
25.7°C
Frost days (< 0 °C)
182 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
128 d/yr
Annual snowfall
132.5 cm
Average feels-like high
2.9 °C
Average feels-like low
-4.5 °C
Average peak gust
34.5 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
8.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.2 °C per decade · r² = 0.26 · 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
34.6 °C
29 July 2010
Coldest day
-40.9 °C
7 January 1985
Wettest day
47 mm
5 August 1987
Windiest day
42.7 km/h
26 December 1992
Strongest gust
98.6 km/h
2 November 2020
Hottest feels-like
34.6 °C
29 July 2010
Coldest feels-like
-46.1 °C
7 January 1985
Snowiest day
17.6 cm
19 April 1977
Sunniest day
19.2 h
20 June 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 | -3.4 °C | +3.4 °C | 43 mm | +11 mm |
| Feb | -1.9 °C | +4.2 °C | 15 mm | -12 mm |
| Mar | 3.4 °C | +4.2 °C | 30 mm | +1 mm |
| Apr | 8.4 °C | +2.7 °C | 18 mm | -19 mm |
| May | 12.4 °C | -0.8 °C | 55 mm | +6 mm |
| Jun | 16.6 °C | -1.6 °C | 73 mm | +4 mm |
| Jul | 24.3 °C | +4.0 °C | 66 mm | -15 mm |
| Aug | 18.5 °C | +0.4 °C | 68 mm | -15 mm |
| Sep | 16.3 °C | +4.1 °C | 72 mm | +12 mm |
| Oct | 7.3 °C | +2.0 °C | 50 mm | -2 mm |
| Nov | 2.3 °C | +2.8 °C | 59 mm | +12 mm |
| Dec | 0.0 °C | +4.2 °C | 78 mm | +37 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 Haapajärvi?
Haapajärvi has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is 2.8 °C and it receives 609 mm of precipitation per year.
What is the hottest day ever recorded in Haapajärvi?
The hottest day measured in Haapajärvi between 1940 and 2025 was 29 July 2010, reaching 34.6 °C.
What is the coldest day in Haapajärvi?
The coldest day measured in Haapajärvi between 1940 and 2025 was 7 January 1985, at -40.9 °C.
Does it snow in Haapajärvi?
Yes. Haapajärvi gets on average 132.5 cm of snow per year and has around 182 frost days.
Has the climate of Haapajärvi warmed?
Yes: Haapajärvi warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Haapajärvi?
The wettest day measured in Haapajärvi between 1940 and 2025 was 5 August 1987, with 47 mm of rain in 24 hours.
What was the windiest day in Haapajärvi?
The windiest day measured in Haapajärvi between 1940 and 2025 was 26 December 1992, with winds reaching 42.7 km/h.
What is the warmest month in Haapajärvi?
The warmest month in Haapajärvi is July (16.2 °C on average); the coldest is January (-9.5 °C).
How much does it rain in Haapajärvi?
Haapajärvi receives on average 609 mm of precipitation per year, spread over about 128 rainy days.
Is it sunny in Haapajärvi?
Haapajärvi gets on average 6.8 hours of sunshine per day, roughly 2,482 hours per year over 1940-2025.
What is the biggest single-day snowfall in Haapajärvi?
The heaviest 24-hour snowfall measured in Haapajärvi between 1940 and 2025 was 19 April 1977, with 17.6 cm.
Are there tropical nights in Haapajärvi?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Haapajärvi.
What was the most extreme apparent temperature in Haapajärvi?
In Haapajärvi, between 1940 and 2025, the highest apparent temperature reached 34.6 °C on 29 July 2010, and the lowest was -46.1 °C on 7 January 1985.
Compare Haapajärvi with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Haapajärvi