Joensuu climate — normals and trends
Joensuu (Finland) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is 3.1 °C and it receives 669 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 (17.1 °C on average) and the coldest is January (-9.7 °C). Rainfall peaks in August.
Joensuu averages 169 frost days, 0 hot days (≥ 30 °C) and 139 rainy days per year.
Joensuu has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.
The number of frost days there went from about 183 to 155 per year over the period.
The hottest day of the period reached 32.2 °C (on 29 July 2010) and the coldest -36.5 °C (on 12 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
JoensuuNorth Karelia
- coords
- 62.60°, 29.76°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
3.1°C
Average daily high
5.7°C
Average daily low
0.5°C
Annual rainfall
669mm
Sunshine / day
6.7h
Mean relative humidity
83%
Average peak wind
16.7km/h
Seasonal range
26.8°C
Frost days (< 0 °C)
169 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
139 d/yr
Annual snowfall
157.4 cm
Average feels-like high
2.5 °C
Average feels-like low
-3.2 °C
Average peak gust
32.9 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
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.30 · 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
32.2 °C
29 July 2010
Coldest day
-36.5 °C
12 January 1987
Wettest day
48 mm
19 September 2007
Windiest day
41.6 km/h
23 January 1995
Strongest gust
90.0 km/h
20 January 1976
Hottest feels-like
32.9 °C
26 June 2013
Coldest feels-like
-41.8 °C
10 January 1987
Snowiest day
15.5 cm
17 February 2024
Sunniest day
18.5 h
29 June 2022
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 | -2.8 °C | +4.6 °C | 54 mm | +13 mm |
| Feb | -3.4 °C | +3.5 °C | 13 mm | -21 mm |
| Mar | 2.2 °C | +4.0 °C | 47 mm | +12 mm |
| Apr | 6.3 °C | +2.2 °C | 40 mm | +2 mm |
| May | 11.8 °C | +0.3 °C | 70 mm | +26 mm |
| Jun | 17.0 °C | -0.5 °C | 77 mm | +8 mm |
| Jul | 23.6 °C | +3.5 °C | 69 mm | -12 mm |
| Aug | 18.6 °C | +0.7 °C | 82 mm | -6 mm |
| Sep | 15.8 °C | +3.6 °C | 63 mm | -7 mm |
| Oct | 7.5 °C | +2.1 °C | 48 mm | -15 mm |
| Nov | 3.1 °C | +3.4 °C | 72 mm | +16 mm |
| Dec | 0.0 °C | +4.3 °C | 72 mm | +21 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 Joensuu?
Joensuu has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is 3.1 °C and it receives 669 mm of precipitation per year.
What is the hottest day ever recorded in Joensuu?
The hottest day measured in Joensuu between 1940 and 2025 was 29 July 2010, reaching 32.2 °C.
What is the coldest day in Joensuu?
The coldest day measured in Joensuu between 1940 and 2025 was 12 January 1987, at -36.5 °C.
Does it snow in Joensuu?
Yes. Joensuu gets on average 157.4 cm of snow per year and has around 169 frost days.
Has the climate of Joensuu warmed?
Yes: Joensuu warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Joensuu?
The wettest day measured in Joensuu between 1940 and 2025 was 19 September 2007, with 48 mm of rain in 24 hours.
What was the windiest day in Joensuu?
The windiest day measured in Joensuu between 1940 and 2025 was 23 January 1995, with winds reaching 41.6 km/h.
What is the warmest month in Joensuu?
The warmest month in Joensuu is July (17.1 °C on average); the coldest is January (-9.7 °C).
How much does it rain in Joensuu?
Joensuu receives on average 669 mm of precipitation per year, spread over about 139 rainy days.
Is it sunny in Joensuu?
Joensuu 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 Joensuu?
The heaviest 24-hour snowfall measured in Joensuu between 1940 and 2025 was 17 February 2024, with 15.5 cm.
Are there tropical nights in Joensuu?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Joensuu.
What was the most extreme apparent temperature in Joensuu?
In Joensuu, between 1940 and 2025, the highest apparent temperature reached 32.9 °C on 26 June 2013, and the lowest was -41.8 °C on 10 January 1987.
Compare Joensuu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Joensuu