Kostomuksha climate — normals and trends
Kostomuksha (Russia) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is 1.4 °C and it receives 612 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 (15.7 °C on average) and the coldest is January (-11.6 °C). Rainfall peaks in August.
Kostomuksha averages 195 frost days, 0 hot days (≥ 30 °C) and 134 rainy days per year.
Kostomuksha has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The number of frost days there went from about 202 to 188 per year over the period.
The hottest day of the period reached 33.6 °C (on 29 July 2010) and the coldest -42.6 °C (on 8 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
KostomukshaRepublic of Karelia
- coords
- 64.57°, 30.58°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
1.4°C
Average daily high
4.6°C
Average daily low
-1.9°C
Annual rainfall
612mm
Sunshine / day
6.3h
Mean relative humidity
80%
Average peak wind
16.2km/h
Seasonal range
27.3°C
Frost days (< 0 °C)
195 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
134 d/yr
Annual snowfall
165.7 cm
Average feels-like high
0.9 °C
Average feels-like low
-5.8 °C
Average peak gust
35.6 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
7.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.23 · 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
33.6 °C
29 July 2010
Coldest day
-42.6 °C
8 January 1985
Wettest day
62 mm
3 August 2021
Windiest day
41.7 km/h
26 December 1992
Strongest gust
99.4 km/h
4 February 1971
Hottest feels-like
34.6 °C
29 July 2010
Coldest feels-like
-48.0 °C
8 January 1985
Snowiest day
20.7 cm
24 November 1994
Sunniest day
20.0 h
16 June 1940
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 | -5.6 °C | +3.4 °C | 37 mm | +4 mm |
| Feb | -4.2 °C | +4.0 °C | 13 mm | -13 mm |
| Mar | 1.2 °C | +3.8 °C | 37 mm | +6 mm |
| Apr | 6.2 °C | +2.4 °C | 15 mm | -23 mm |
| May | 11.5 °C | +0.5 °C | 76 mm | +25 mm |
| Jun | 15.9 °C | -0.9 °C | 69 mm | -1 mm |
| Jul | 23.6 °C | +4.1 °C | 42 mm | -35 mm |
| Aug | 18.6 °C | +1.6 °C | 74 mm | -3 mm |
| Sep | 15.7 °C | +4.7 °C | 80 mm | +13 mm |
| Oct | 6.2 °C | +2.4 °C | 50 mm | -5 mm |
| Nov | 0.5 °C | +2.7 °C | 58 mm | +10 mm |
| Dec | -2.3 °C | +3.8 °C | 72 mm | +32 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 Kostomuksha?
Kostomuksha has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is 1.4 °C and it receives 612 mm of precipitation per year.
What is the hottest day ever recorded in Kostomuksha?
The hottest day measured in Kostomuksha between 1940 and 2025 was 29 July 2010, reaching 33.6 °C.
What is the coldest day in Kostomuksha?
The coldest day measured in Kostomuksha between 1940 and 2025 was 8 January 1985, at -42.6 °C.
Does it snow in Kostomuksha?
Yes. Kostomuksha gets on average 165.7 cm of snow per year and has around 195 frost days.
Has the climate of Kostomuksha warmed?
Yes: Kostomuksha warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Kostomuksha?
The wettest day measured in Kostomuksha between 1940 and 2025 was 3 August 2021, with 62 mm of rain in 24 hours.
What was the windiest day in Kostomuksha?
The windiest day measured in Kostomuksha between 1940 and 2025 was 26 December 1992, with winds reaching 41.7 km/h.
What is the warmest month in Kostomuksha?
The warmest month in Kostomuksha is July (15.7 °C on average); the coldest is January (-11.6 °C).
How much does it rain in Kostomuksha?
Kostomuksha receives on average 612 mm of precipitation per year, spread over about 134 rainy days.
Is it sunny in Kostomuksha?
Kostomuksha gets on average 6.3 hours of sunshine per day, roughly 2,300 hours per year over 1940-2025.
What is the biggest single-day snowfall in Kostomuksha?
The heaviest 24-hour snowfall measured in Kostomuksha between 1940 and 2025 was 24 November 1994, with 20.7 cm.
Are there tropical nights in Kostomuksha?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Kostomuksha.
What was the most extreme apparent temperature in Kostomuksha?
In Kostomuksha, between 1940 and 2025, the highest apparent temperature reached 34.6 °C on 29 July 2010, and the lowest was -48.0 °C on 8 January 1985.
Compare Kostomuksha with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Kostomuksha