Zheleznogorsk-Ilimskiy climate — normals and trends
Zheleznogorsk-Ilimskiy (Russia) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is -2.5 °C and it receives 494 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 (17.8 °C on average) and the coldest is January (-23.3 °C). Rainfall peaks in July.
Zheleznogorsk-Ilimskiy averages 227 frost days, 3 hot days (≥ 30 °C) and 121 rainy days per year.
Zheleznogorsk-Ilimskiy 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 233 to 221 per year over the period.
The hottest day of the period reached 34.5 °C (on 2 July 2019) and the coldest -56.9 °C (on 27 December 1949).
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
Zheleznogorsk-IlimskiyIrkutsk Oblast
- coords
- 56.58°, 104.13°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
-2.5°C
Average daily high
2.3°C
Average daily low
-7.5°C
Annual rainfall
494mm
Sunshine / day
8.2h
Mean relative humidity
72%
Average peak wind
14.2km/h
Seasonal range
41.1°C
Frost days (< 0 °C)
227 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
121 d/yr
Annual snowfall
135.0 cm
Average feels-like high
-1.3 °C
Average feels-like low
-11.4 °C
Average peak gust
31.6 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
11.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.3 °C
since 1940
+0.3 °C per decade · r² = 0.28 · 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
34.5 °C
2 July 2019
Coldest day
-56.9 °C
27 December 1949
Wettest day
77 mm
31 July 1980
Windiest day
37.6 km/h
16 May 1967
Strongest gust
88.9 km/h
12 April 1978
Hottest feels-like
37.9 °C
24 July 1949
Coldest feels-like
-61.9 °C
27 December 1949
Snowiest day
17.9 cm
7 September 1968
Sunniest day
16.9 h
17 June 1941
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 | -13.0 °C | +6.6 °C | 20 mm | +3 mm |
| Feb | -13.9 °C | +1.0 °C | 31 mm | +17 mm |
| Mar | -1.2 °C | +3.5 °C | 42 mm | +22 mm |
| Apr | 6.9 °C | +2.9 °C | 59 mm | +28 mm |
| May | 15.0 °C | +2.1 °C | 36 mm | -11 mm |
| Jun | 22.2 °C | +1.6 °C | 95 mm | +32 mm |
| Jul | 22.8 °C | -0.1 °C | 41 mm | -35 mm |
| Aug | 21.4 °C | +1.4 °C | 45 mm | -28 mm |
| Sep | 14.3 °C | +2.2 °C | 78 mm | +26 mm |
| Oct | -0.7 °C | -2.9 °C | 25 mm | -15 mm |
| Nov | -5.4 °C | +4.3 °C | 50 mm | +16 mm |
| Dec | -17.1 °C | +0.8 °C | 32 mm | +6 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 Zheleznogorsk-Ilimskiy?
Zheleznogorsk-Ilimskiy has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is -2.5 °C and it receives 494 mm of precipitation per year.
What is the hottest day ever recorded in Zheleznogorsk-Ilimskiy?
The hottest day measured in Zheleznogorsk-Ilimskiy between 1940 and 2025 was 2 July 2019, reaching 34.5 °C.
What is the coldest day in Zheleznogorsk-Ilimskiy?
The coldest day measured in Zheleznogorsk-Ilimskiy between 1940 and 2025 was 27 December 1949, at -56.9 °C.
Does it snow in Zheleznogorsk-Ilimskiy?
Yes. Zheleznogorsk-Ilimskiy gets on average 135.0 cm of snow per year and has around 227 frost days.
Has the climate of Zheleznogorsk-Ilimskiy warmed?
Yes: Zheleznogorsk-Ilimskiy warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Zheleznogorsk-Ilimskiy?
The wettest day measured in Zheleznogorsk-Ilimskiy between 1940 and 2025 was 31 July 1980, with 77 mm of rain in 24 hours.
What was the windiest day in Zheleznogorsk-Ilimskiy?
The windiest day measured in Zheleznogorsk-Ilimskiy between 1940 and 2025 was 16 May 1967, with winds reaching 37.6 km/h.
What is the warmest month in Zheleznogorsk-Ilimskiy?
The warmest month in Zheleznogorsk-Ilimskiy is July (17.8 °C on average); the coldest is January (-23.3 °C).
How much does it rain in Zheleznogorsk-Ilimskiy?
Zheleznogorsk-Ilimskiy receives on average 494 mm of precipitation per year, spread over about 121 rainy days.
Is it sunny in Zheleznogorsk-Ilimskiy?
Zheleznogorsk-Ilimskiy gets on average 8.2 hours of sunshine per day, roughly 2,993 hours per year over 1940-2025.
What is the biggest single-day snowfall in Zheleznogorsk-Ilimskiy?
The heaviest 24-hour snowfall measured in Zheleznogorsk-Ilimskiy between 1940 and 2025 was 7 September 1968, with 17.9 cm.
Are there tropical nights in Zheleznogorsk-Ilimskiy?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Zheleznogorsk-Ilimskiy.
What was the most extreme apparent temperature in Zheleznogorsk-Ilimskiy?
In Zheleznogorsk-Ilimskiy, between 1940 and 2025, the highest apparent temperature reached 37.9 °C on 24 July 1949, and the lowest was -61.9 °C on 27 December 1949.
Compare Zheleznogorsk-Ilimskiy with another city
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Nearby cities
The climate around Zheleznogorsk-Ilimskiy