Jääli climate — normals and trends
Jääli (Finland) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is 2.4 °C and it receives 594 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 (16.3 °C on average) and the coldest is January (-10.0 °C). Rainfall peaks in August.
Jääli averages 183 frost days, 0 hot days (≥ 30 °C) and 123 rainy days per year.
Jääli 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 193 to 173 per year over the period.
The hottest day of the period reached 32.5 °C (on 31 July 2025) and the coldest -40.6 °C (on 6 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
JääliNorth Ostrobothnia
- coords
- 65.09°, 25.69°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
2.4°C
Average daily high
5.6°C
Average daily low
-1.1°C
Annual rainfall
594mm
Sunshine / day
7.0h
Mean relative humidity
80%
Average peak wind
16.2km/h
Seasonal range
26.3°C
Frost days (< 0 °C)
183 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
123 d/yr
Annual snowfall
134.0 cm
Average feels-like high
2.3 °C
Average feels-like low
-4.8 °C
Average peak gust
34.4 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
8.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.21 · 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
32.5 °C
31 July 2025
Coldest day
-40.6 °C
6 January 1985
Wettest day
37 mm
8 August 1980
Windiest day
47.0 km/h
26 December 1992
Strongest gust
103.7 km/h
4 February 1971
Hottest feels-like
33.8 °C
29 July 2010
Coldest feels-like
-46.0 °C
8 January 1987
Snowiest day
16.7 cm
9 April 1949
Sunniest day
20.2 h
16 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 | -4.1 °C | +3.1 °C | 43 mm | +8 mm |
| Feb | -2.5 °C | +4.2 °C | 29 mm | -0 mm |
| Mar | 2.1 °C | +3.9 °C | 38 mm | +8 mm |
| Apr | 6.8 °C | +2.4 °C | 15 mm | -21 mm |
| May | 11.7 °C | -0.1 °C | 54 mm | +7 mm |
| Jun | 16.0 °C | -1.3 °C | 88 mm | +28 mm |
| Jul | 24.2 °C | +4.0 °C | 66 mm | -8 mm |
| Aug | 18.6 °C | +0.7 °C | 66 mm | -12 mm |
| Sep | 16.3 °C | +4.2 °C | 99 mm | +39 mm |
| Oct | 7.8 °C | +2.8 °C | 67 mm | +14 mm |
| Nov | 0.9 °C | +1.6 °C | 59 mm | +12 mm |
| Dec | -1.0 °C | +3.5 °C | 66 mm | +22 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 Jääli?
Jääli has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is 2.4 °C and it receives 594 mm of precipitation per year.
What is the hottest day ever recorded in Jääli?
The hottest day measured in Jääli between 1940 and 2025 was 31 July 2025, reaching 32.5 °C.
What is the coldest day in Jääli?
The coldest day measured in Jääli between 1940 and 2025 was 6 January 1985, at -40.6 °C.
Does it snow in Jääli?
Yes. Jääli gets on average 134.0 cm of snow per year and has around 183 frost days.
Has the climate of Jääli warmed?
Yes: Jääli warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Jääli?
The wettest day measured in Jääli between 1940 and 2025 was 8 August 1980, with 37 mm of rain in 24 hours.
What was the windiest day in Jääli?
The windiest day measured in Jääli between 1940 and 2025 was 26 December 1992, with winds reaching 47.0 km/h.
What is the warmest month in Jääli?
The warmest month in Jääli is July (16.3 °C on average); the coldest is January (-10.0 °C).
How much does it rain in Jääli?
Jääli receives on average 594 mm of precipitation per year, spread over about 123 rainy days.
Is it sunny in Jääli?
Jääli gets on average 7.0 hours of sunshine per day, roughly 2,555 hours per year over 1940-2025.
What is the biggest single-day snowfall in Jääli?
The heaviest 24-hour snowfall measured in Jääli between 1940 and 2025 was 9 April 1949, with 16.7 cm.
Are there tropical nights in Jääli?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Jääli.
What was the most extreme apparent temperature in Jääli?
In Jääli, between 1940 and 2025, the highest apparent temperature reached 33.8 °C on 29 July 2010, and the lowest was -46.0 °C on 8 January 1987.
Compare Jääli with another city
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Nearby cities
The climate around Jääli