Suolahti climate — normals and trends
Suolahti (Finland) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is 3.4 °C and it receives 631 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 (16.5 °C on average) and the coldest is January (-8.6 °C). Rainfall peaks in August.
Suolahti averages 169 frost days, 0 hot days (≥ 30 °C) and 130 rainy days per year.
Suolahti has warmed by +2.2 °C between 1940 and 2025, or +0.26 °C per decade. This trend is statistically significant.
The number of frost days there went from about 182 to 156 per year over the period.
The hottest day of the period reached 33.2 °C (on 29 July 2010) and the coldest -35.6 °C (on 11 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
SuolahtiCentral Finland
- coords
- 62.56°, 25.85°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
3.4°C
Average daily high
6.3°C
Average daily low
0.4°C
Annual rainfall
631mm
Sunshine / day
6.7h
Mean relative humidity
81%
Average peak wind
15.9km/h
Seasonal range
25.1°C
Frost days (< 0 °C)
169 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
130 d/yr
Annual snowfall
143.6 cm
Average feels-like high
3.1 °C
Average feels-like low
-3.2 °C
Average peak gust
34.8 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
+2.2 °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
33.2 °C
29 July 2010
Coldest day
-35.6 °C
11 January 1987
Wettest day
51 mm
28 July 2004
Windiest day
40.9 km/h
18 April 1976
Strongest gust
106.2 km/h
26 October 1985
Hottest feels-like
33.1 °C
29 July 2010
Coldest feels-like
-41.3 °C
10 January 1987
Snowiest day
21.4 cm
25 January 2002
Sunniest day
19.0 h
20 June 2018
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 | -2.3 °C | +3.9 °C | 47 mm | +10 mm |
| Feb | -2.3 °C | +3.5 °C | 21 mm | -9 mm |
| Mar | 3.6 °C | +4.4 °C | 41 mm | +9 mm |
| Apr | 8.3 °C | +3.0 °C | 41 mm | +2 mm |
| May | 12.0 °C | -0.7 °C | 51 mm | +4 mm |
| Jun | 17.1 °C | -0.7 °C | 98 mm | +30 mm |
| Jul | 24.1 °C | +4.1 °C | 74 mm | -9 mm |
| Aug | 18.6 °C | +0.6 °C | 75 mm | -8 mm |
| Sep | 16.2 °C | +3.8 °C | 70 mm | +9 mm |
| Oct | 7.5 °C | +1.7 °C | 50 mm | -7 mm |
| Nov | 3.3 °C | +3.1 °C | 44 mm | -7 mm |
| Dec | 1.0 °C | +4.6 °C | 69 mm | +24 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 Suolahti?
Suolahti has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is 3.4 °C and it receives 631 mm of precipitation per year.
What is the hottest day ever recorded in Suolahti?
The hottest day measured in Suolahti between 1940 and 2025 was 29 July 2010, reaching 33.2 °C.
What is the coldest day in Suolahti?
The coldest day measured in Suolahti between 1940 and 2025 was 11 January 1987, at -35.6 °C.
Does it snow in Suolahti?
Yes. Suolahti gets on average 143.6 cm of snow per year and has around 169 frost days.
Has the climate of Suolahti warmed?
Yes: Suolahti warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Suolahti?
The wettest day measured in Suolahti between 1940 and 2025 was 28 July 2004, with 51 mm of rain in 24 hours.
What was the windiest day in Suolahti?
The windiest day measured in Suolahti between 1940 and 2025 was 18 April 1976, with winds reaching 40.9 km/h.
What is the warmest month in Suolahti?
The warmest month in Suolahti is July (16.5 °C on average); the coldest is January (-8.6 °C).
How much does it rain in Suolahti?
Suolahti receives on average 631 mm of precipitation per year, spread over about 130 rainy days.
Is it sunny in Suolahti?
Suolahti 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 Suolahti?
The heaviest 24-hour snowfall measured in Suolahti between 1940 and 2025 was 25 January 2002, with 21.4 cm.
Are there tropical nights in Suolahti?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Suolahti.
What was the most extreme apparent temperature in Suolahti?
In Suolahti, between 1940 and 2025, the highest apparent temperature reached 33.1 °C on 29 July 2010, and the lowest was -41.3 °C on 10 January 1987.
Compare Suolahti with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Suolahti