Nilsiä climate — normals and trends
Nilsiä (Finland) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is 2.7 °C and it receives 693 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 (16.6 °C on average) and the coldest is January (-10.2 °C). Rainfall peaks in August.
Nilsiä averages 179 frost days, 1 hot days (≥ 30 °C) and 139 rainy days per year.
Nilsiä 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 190 to 168 per year over the period.
The hottest day of the period reached 34.8 °C (on 29 July 2010) and the coldest -38.4 °C (on 7 January 1985).
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
NilsiäNorth Savo
- coords
- 63.21°, 28.08°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
2.7°C
Average daily high
5.8°C
Average daily low
-0.7°C
Annual rainfall
693mm
Sunshine / day
6.6h
Mean relative humidity
81%
Average peak wind
15.3km/h
Seasonal range
26.8°C
Frost days (< 0 °C)
179 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
139 d/yr
Annual snowfall
166.4 cm
Average feels-like high
2.5 °C
Average feels-like low
-4.3 °C
Average peak gust
33.1 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
8.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.3 °C
since 1940
+0.3 °C per decade · r² = 0.29 · 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
34.8 °C
29 July 2010
Coldest day
-38.4 °C
7 January 1985
Wettest day
50 mm
5 August 1987
Windiest day
42.2 km/h
18 April 1976
Strongest gust
94.7 km/h
26 March 2008
Hottest feels-like
34.8 °C
29 July 2010
Coldest feels-like
-43.9 °C
10 January 1958
Snowiest day
16.6 cm
21 November 1980
Sunniest day
19.4 h
22 June 2020
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 | -3.6 °C | +4.0 °C | 49 mm | +8 mm |
| Feb | -3.4 °C | +3.6 °C | 17 mm | -17 mm |
| Mar | 2.7 °C | +4.2 °C | 47 mm | +12 mm |
| Apr | 7.8 °C | +2.8 °C | 19 mm | -21 mm |
| May | 12.3 °C | -0.3 °C | 61 mm | +10 mm |
| Jun | 17.1 °C | -0.9 °C | 101 mm | +28 mm |
| Jul | 25.0 °C | +4.5 °C | 48 mm | -37 mm |
| Aug | 19.3 °C | +1.2 °C | 61 mm | -29 mm |
| Sep | 16.3 °C | +4.1 °C | 75 mm | +3 mm |
| Oct | 7.3 °C | +2.1 °C | 66 mm | +4 mm |
| Nov | 2.7 °C | +3.3 °C | 75 mm | +17 mm |
| Dec | -0.6 °C | +4.2 °C | 81 mm | +30 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 Nilsiä?
Nilsiä has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is 2.7 °C and it receives 693 mm of precipitation per year.
What is the hottest day ever recorded in Nilsiä?
The hottest day measured in Nilsiä between 1940 and 2025 was 29 July 2010, reaching 34.8 °C.
What is the coldest day in Nilsiä?
The coldest day measured in Nilsiä between 1940 and 2025 was 7 January 1985, at -38.4 °C.
Does it snow in Nilsiä?
Yes. Nilsiä gets on average 166.4 cm of snow per year and has around 179 frost days.
Has the climate of Nilsiä warmed?
Yes: Nilsiä warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Nilsiä?
The wettest day measured in Nilsiä between 1940 and 2025 was 5 August 1987, with 50 mm of rain in 24 hours.
What was the windiest day in Nilsiä?
The windiest day measured in Nilsiä between 1940 and 2025 was 18 April 1976, with winds reaching 42.2 km/h.
What is the warmest month in Nilsiä?
The warmest month in Nilsiä is July (16.6 °C on average); the coldest is January (-10.2 °C).
How much does it rain in Nilsiä?
Nilsiä receives on average 693 mm of precipitation per year, spread over about 139 rainy days.
Is it sunny in Nilsiä?
Nilsiä gets on average 6.6 hours of sunshine per day, roughly 2,409 hours per year over 1940-2025.
What is the biggest single-day snowfall in Nilsiä?
The heaviest 24-hour snowfall measured in Nilsiä between 1940 and 2025 was 21 November 1980, with 16.6 cm.
Are there tropical nights in Nilsiä?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Nilsiä.
What was the most extreme apparent temperature in Nilsiä?
In Nilsiä, between 1940 and 2025, the highest apparent temperature reached 34.8 °C on 29 July 2010, and the lowest was -43.9 °C on 10 January 1958.
Compare Nilsiä with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Nilsiä