Sim climate — normals and trends
Sim (Russia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 2.1 °C and it receives 790 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 (-14.2 °C). Rainfall peaks in July.
Sim averages 190 frost days, 4 hot days (≥ 30 °C) and 149 rainy days per year.
Sim has warmed by +2.4 °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 200 to 180 per year over the period.
The hottest day of the period reached 37.9 °C (on 11 July 2023) and the coldest -45.5 °C (on 1 January 1979).
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
SimChelyabinsk Oblast
- coords
- 54.99°, 57.70°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
2.1°C
Average daily high
6.3°C
Average daily low
-2.2°C
Annual rainfall
790mm
Sunshine / day
7.4h
Mean relative humidity
75%
Average peak wind
14.9km/h
Seasonal range
31.7°C
Frost days (< 0 °C)
190 d/yr
Hot days (≥ 30 °C)
4 d/yr
Rainy days (≥ 1 mm)
149 d/yr
Annual snowfall
204.8 cm
Average feels-like high
3.1 °C
Average feels-like low
-5.8 °C
Average peak gust
35.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.40 · 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
37.9 °C
11 July 2023
Coldest day
-45.5 °C
1 January 1979
Wettest day
66 mm
18 July 1943
Windiest day
47.5 km/h
9 February 1958
Strongest gust
112.0 km/h
20 October 1973
Hottest feels-like
38.0 °C
29 July 1952
Coldest feels-like
-50.1 °C
1 January 1979
Snowiest day
30.0 cm
17 May 1981
Sunniest day
16.2 h
7 July 2023
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -4.6 °C | +6.4 °C | 82 mm | +44 mm |
| Feb | -5.7 °C | +2.8 °C | 15 mm | -18 mm |
| Mar | 3.0 °C | +4.5 °C | 64 mm | +20 mm |
| Apr | 12.8 °C | +4.3 °C | 67 mm | +19 mm |
| May | 18.3 °C | +1.7 °C | 55 mm | -15 mm |
| Jun | 22.0 °C | +1.1 °C | 90 mm | +1 mm |
| Jul | 21.6 °C | -0.8 °C | 110 mm | +2 mm |
| Aug | 21.1 °C | +0.6 °C | 127 mm | +42 mm |
| Sep | 15.5 °C | +1.1 °C | 63 mm | -17 mm |
| Oct | 8.8 °C | +3.4 °C | 42 mm | -40 mm |
| Nov | 2.2 °C | +5.3 °C | 97 mm | +33 mm |
| Dec | -5.9 °C | +3.0 °C | 47 mm | -2 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 Sim?
Sim has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 2.1 °C and it receives 790 mm of precipitation per year.
What is the hottest day ever recorded in Sim?
The hottest day measured in Sim between 1940 and 2025 was 11 July 2023, reaching 37.9 °C.
What is the coldest day in Sim?
The coldest day measured in Sim between 1940 and 2025 was 1 January 1979, at -45.5 °C.
Does it snow in Sim?
Yes. Sim gets on average 204.8 cm of snow per year and has around 190 frost days.
Has the climate of Sim warmed?
Yes: Sim warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sim?
The wettest day measured in Sim between 1940 and 2025 was 18 July 1943, with 66 mm of rain in 24 hours.
What was the windiest day in Sim?
The windiest day measured in Sim between 1940 and 2025 was 9 February 1958, with winds reaching 47.5 km/h.
What is the warmest month in Sim?
The warmest month in Sim is July (17.5 °C on average); the coldest is January (-14.2 °C).
How much does it rain in Sim?
Sim receives on average 790 mm of precipitation per year, spread over about 149 rainy days.
Is it sunny in Sim?
Sim gets on average 7.4 hours of sunshine per day, roughly 2,701 hours per year over 1940-2025.
What is the biggest single-day snowfall in Sim?
The heaviest 24-hour snowfall measured in Sim between 1940 and 2025 was 17 May 1981, with 30.0 cm.
Are there tropical nights in Sim?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Sim.
What was the most extreme apparent temperature in Sim?
In Sim, between 1940 and 2025, the highest apparent temperature reached 38.0 °C on 29 July 1952, and the lowest was -50.1 °C on 1 January 1979.
Compare Sim with another city
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Nearby cities
The climate around Sim