Suonenjoki climate — normals and trends
Suonenjoki (Finland) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is 3.4 °C and it receives 650 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 (16.9 °C on average) and the coldest is January (-9.1 °C). Rainfall peaks in August.
Suonenjoki averages 168 frost days, 1 hot days (≥ 30 °C) and 135 rainy days per year.
Suonenjoki 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 182 to 154 per year over the period.
The hottest day of the period reached 34.4 °C (on 29 July 2010) and the coldest -37.9 °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
SuonenjokiNorth Savo
- coords
- 62.62°, 27.13°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
3.4°C
Average daily high
6.4°C
Average daily low
0.3°C
Annual rainfall
650mm
Sunshine / day
6.7h
Mean relative humidity
81%
Average peak wind
15.9km/h
Seasonal range
26.0°C
Frost days (< 0 °C)
168 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
135 d/yr
Annual snowfall
143.7 cm
Average feels-like high
3.1 °C
Average feels-like low
-3.3 °C
Average peak gust
34.5 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
8.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.31 · 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
34.4 °C
29 July 2010
Coldest day
-37.9 °C
8 January 1987
Wettest day
71 mm
30 June 2020
Windiest day
43.2 km/h
1 October 1994
Strongest gust
97.9 km/h
26 October 1985
Hottest feels-like
33.5 °C
29 July 2010
Coldest feels-like
-43.3 °C
8 January 1987
Snowiest day
18.4 cm
25 January 2002
Sunniest day
19.0 h
25 June 1941
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 | -2.4 °C | +4.2 °C | 47 mm | +10 mm |
| Feb | -2.7 °C | +3.5 °C | 19 mm | -11 mm |
| Mar | 3.4 °C | +4.4 °C | 43 mm | +11 mm |
| Apr | 8.0 °C | +2.7 °C | 43 mm | +5 mm |
| May | 12.4 °C | -0.5 °C | 49 mm | -1 mm |
| Jun | 17.6 °C | -0.7 °C | 109 mm | +39 mm |
| Jul | 24.8 °C | +4.3 °C | 69 mm | -16 mm |
| Aug | 19.2 °C | +0.8 °C | 76 mm | -12 mm |
| Sep | 16.6 °C | +4.0 °C | 74 mm | +8 mm |
| Oct | 7.6 °C | +1.7 °C | 66 mm | +8 mm |
| Nov | 3.5 °C | +3.4 °C | 46 mm | -6 mm |
| Dec | 0.7 °C | +4.6 °C | 69 mm | +23 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 Suonenjoki?
Suonenjoki has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is 3.4 °C and it receives 650 mm of precipitation per year.
What is the hottest day ever recorded in Suonenjoki?
The hottest day measured in Suonenjoki between 1940 and 2025 was 29 July 2010, reaching 34.4 °C.
What is the coldest day in Suonenjoki?
The coldest day measured in Suonenjoki between 1940 and 2025 was 8 January 1987, at -37.9 °C.
Does it snow in Suonenjoki?
Yes. Suonenjoki gets on average 143.7 cm of snow per year and has around 168 frost days.
Has the climate of Suonenjoki warmed?
Yes: Suonenjoki warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Suonenjoki?
The wettest day measured in Suonenjoki between 1940 and 2025 was 30 June 2020, with 71 mm of rain in 24 hours.
What was the windiest day in Suonenjoki?
The windiest day measured in Suonenjoki between 1940 and 2025 was 1 October 1994, with winds reaching 43.2 km/h.
What is the warmest month in Suonenjoki?
The warmest month in Suonenjoki is July (16.9 °C on average); the coldest is January (-9.1 °C).
How much does it rain in Suonenjoki?
Suonenjoki receives on average 650 mm of precipitation per year, spread over about 135 rainy days.
Is it sunny in Suonenjoki?
Suonenjoki 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 Suonenjoki?
The heaviest 24-hour snowfall measured in Suonenjoki between 1940 and 2025 was 25 January 2002, with 18.4 cm.
Are there tropical nights in Suonenjoki?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Suonenjoki.
What was the most extreme apparent temperature in Suonenjoki?
In Suonenjoki, between 1940 and 2025, the highest apparent temperature reached 33.5 °C on 29 July 2010, and the lowest was -43.3 °C on 8 January 1987.
Compare Suonenjoki with another city
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Nearby cities
The climate around Suonenjoki