Savonlinna climate — normals and trends
Savonlinna (Finland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 3.8 °C and it receives 623 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 (17.5 °C on average) and the coldest is January (-8.7 °C). Rainfall peaks in August.
Savonlinna averages 162 frost days, 0 hot days (≥ 30 °C) and 132 rainy days per year.
Savonlinna has warmed by +2.5 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.
The number of frost days there went from about 179 to 145 per year over the period.
The hottest day of the period reached 31.7 °C (on 28 June 1988) and the coldest -36.8 °C (on 10 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
SavonlinnaSouth Savo
- coords
- 61.87°, 28.88°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
3.8°C
Average daily high
6.3°C
Average daily low
1.1°C
Annual rainfall
623mm
Sunshine / day
6.9h
Mean relative humidity
82%
Average peak wind
17.3km/h
Seasonal range
26.2°C
Frost days (< 0 °C)
162 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
132 d/yr
Annual snowfall
140.7 cm
Average feels-like high
3.1 °C
Average feels-like low
-2.5 °C
Average peak gust
33.6 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
9.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.33 · 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
31.7 °C
28 June 1988
Coldest day
-36.8 °C
10 January 1987
Wettest day
48 mm
8 July 2025
Windiest day
45.8 km/h
7 September 1977
Strongest gust
89.3 km/h
27 May 1986
Hottest feels-like
33.2 °C
26 June 2013
Coldest feels-like
-42.4 °C
9 January 1987
Snowiest day
13.2 cm
26 March 2008
Sunniest day
18.1 h
28 June 2024
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 | -1.6 °C | +4.9 °C | 60 mm | +22 mm |
| Feb | -2.9 °C | +3.3 °C | 12 mm | -20 mm |
| Mar | 2.7 °C | +4.0 °C | 37 mm | +5 mm |
| Apr | 7.0 °C | +2.2 °C | 47 mm | +11 mm |
| May | 12.3 °C | -0.5 °C | 88 mm | +42 mm |
| Jun | 17.6 °C | -0.7 °C | 90 mm | +22 mm |
| Jul | 24.3 °C | +3.8 °C | 87 mm | +8 mm |
| Aug | 18.7 °C | +0.3 °C | 73 mm | -7 mm |
| Sep | 16.4 °C | +3.8 °C | 52 mm | -7 mm |
| Oct | 7.7 °C | +1.7 °C | 43 mm | -12 mm |
| Nov | 3.6 °C | +3.4 °C | 60 mm | +9 mm |
| Dec | 0.9 °C | +4.5 °C | 61 mm | +14 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 Savonlinna?
Savonlinna has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 3.8 °C and it receives 623 mm of precipitation per year.
What is the hottest day ever recorded in Savonlinna?
The hottest day measured in Savonlinna between 1940 and 2025 was 28 June 1988, reaching 31.7 °C.
What is the coldest day in Savonlinna?
The coldest day measured in Savonlinna between 1940 and 2025 was 10 January 1987, at -36.8 °C.
Does it snow in Savonlinna?
Yes. Savonlinna gets on average 140.7 cm of snow per year and has around 162 frost days.
Has the climate of Savonlinna warmed?
Yes: Savonlinna warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Savonlinna?
The wettest day measured in Savonlinna between 1940 and 2025 was 8 July 2025, with 48 mm of rain in 24 hours.
What was the windiest day in Savonlinna?
The windiest day measured in Savonlinna between 1940 and 2025 was 7 September 1977, with winds reaching 45.8 km/h.
What is the warmest month in Savonlinna?
The warmest month in Savonlinna is July (17.5 °C on average); the coldest is January (-8.7 °C).
How much does it rain in Savonlinna?
Savonlinna receives on average 623 mm of precipitation per year, spread over about 132 rainy days.
Is it sunny in Savonlinna?
Savonlinna gets on average 6.9 hours of sunshine per day, roughly 2,519 hours per year over 1940-2025.
What is the biggest single-day snowfall in Savonlinna?
The heaviest 24-hour snowfall measured in Savonlinna between 1940 and 2025 was 26 March 2008, with 13.2 cm.
Are there tropical nights in Savonlinna?
Yes: Savonlinna has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Savonlinna?
In Savonlinna, between 1940 and 2025, the highest apparent temperature reached 33.2 °C on 26 June 2013, and the lowest was -42.4 °C on 9 January 1987.
Compare Savonlinna with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Savonlinna