Korpilahti climate — normals and trends
Korpilahti (Finland) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is 3.7 °C and it receives 655 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 (16.7 °C on average) and the coldest is January (-8.3 °C). Rainfall peaks in August.
Korpilahti averages 167 frost days, 0 hot days (≥ 30 °C) and 133 rainy days per year.
Korpilahti has warmed by +2.3 °C between 1940 and 2025, or +0.27 °C per decade. This trend is statistically significant.
The number of frost days there went from about 180 to 154 per year over the period.
The hottest day of the period reached 33.7 °C (on 29 July 2010) and the coldest -36.9 °C (on 8 January 1987).
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
KorpilahtiCentral Finland
- coords
- 62.02°, 25.55°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
3.7°C
Average daily high
6.8°C
Average daily low
0.5°C
Annual rainfall
655mm
Sunshine / day
6.7h
Mean relative humidity
81%
Average peak wind
15.9km/h
Seasonal range
25.0°C
Frost days (< 0 °C)
167 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
133 d/yr
Annual snowfall
142.0 cm
Average feels-like high
3.5 °C
Average feels-like low
-3.0 °C
Average peak gust
34.6 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
8.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.3 °C
since 1940
+0.3 °C per decade · r² = 0.32 · 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
33.7 °C
29 July 2010
Coldest day
-36.9 °C
8 January 1987
Wettest day
60 mm
12 August 1972
Windiest day
41.7 km/h
7 September 1977
Strongest gust
95.4 km/h
26 October 1985
Hottest feels-like
33.9 °C
8 August 2010
Coldest feels-like
-42.1 °C
8 January 1987
Snowiest day
21.7 cm
25 January 2002
Sunniest day
18.9 h
17 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 | -1.5 °C | +4.4 °C | 50 mm | +10 mm |
| Feb | -2.3 °C | +3.2 °C | 20 mm | -12 mm |
| Mar | 4.0 °C | +4.5 °C | 40 mm | +7 mm |
| Apr | 8.9 °C | +3.1 °C | 51 mm | +11 mm |
| May | 12.6 °C | -0.7 °C | 45 mm | -2 mm |
| Jun | 17.6 °C | -0.7 °C | 111 mm | +43 mm |
| Jul | 24.7 °C | +4.2 °C | 65 mm | -19 mm |
| Aug | 19.0 °C | +0.5 °C | 83 mm | -4 mm |
| Sep | 16.5 °C | +3.6 °C | 84 mm | +20 mm |
| Oct | 8.1 °C | +1.7 °C | 57 mm | -2 mm |
| Nov | 3.9 °C | +3.2 °C | 52 mm | -2 mm |
| Dec | 1.5 °C | +4.7 °C | 70 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 Korpilahti?
Korpilahti has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is 3.7 °C and it receives 655 mm of precipitation per year.
What is the hottest day ever recorded in Korpilahti?
The hottest day measured in Korpilahti between 1940 and 2025 was 29 July 2010, reaching 33.7 °C.
What is the coldest day in Korpilahti?
The coldest day measured in Korpilahti between 1940 and 2025 was 8 January 1987, at -36.9 °C.
Does it snow in Korpilahti?
Yes. Korpilahti gets on average 142.0 cm of snow per year and has around 167 frost days.
Has the climate of Korpilahti warmed?
Yes: Korpilahti warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Korpilahti?
The wettest day measured in Korpilahti between 1940 and 2025 was 12 August 1972, with 60 mm of rain in 24 hours.
What was the windiest day in Korpilahti?
The windiest day measured in Korpilahti between 1940 and 2025 was 7 September 1977, with winds reaching 41.7 km/h.
What is the warmest month in Korpilahti?
The warmest month in Korpilahti is July (16.7 °C on average); the coldest is January (-8.3 °C).
How much does it rain in Korpilahti?
Korpilahti receives on average 655 mm of precipitation per year, spread over about 133 rainy days.
Is it sunny in Korpilahti?
Korpilahti gets on average 6.7 hours of sunshine per day, roughly 2,446 hours per year over 1940-2025.
What is the biggest single-day snowfall in Korpilahti?
The heaviest 24-hour snowfall measured in Korpilahti between 1940 and 2025 was 25 January 2002, with 21.7 cm.
Are there tropical nights in Korpilahti?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Korpilahti.
What was the most extreme apparent temperature in Korpilahti?
In Korpilahti, between 1940 and 2025, the highest apparent temperature reached 33.9 °C on 8 August 2010, and the lowest was -42.1 °C on 8 January 1987.
Compare Korpilahti with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Korpilahti