Sosnovy Bor climate — normals and trends
Sosnovy Bor (Russia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 4.7 °C and it receives 702 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 (16.2 °C on average) and the coldest is February (-5.2 °C). Rainfall peaks in September.
Sosnovy Bor averages 129 frost days, 0 hot days (≥ 30 °C) and 142 rainy days per year.
Sosnovy Bor has warmed by +2.1 °C between 1940 and 2025, or +0.25 °C per decade. This trend is statistically significant.
The number of frost days there went from about 144 to 114 per year over the period.
The hottest day of the period reached 28.8 °C (on 8 August 2010) and the coldest -30.4 °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
Sosnovy BorLeningradskaya Oblast'
- coords
- 59.90°, 29.09°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
4.7°C
Average daily high
6.2°C
Average daily low
3.4°C
Annual rainfall
702mm
Sunshine / day
7.2h
Mean relative humidity
83%
Average peak wind
29.6km/h
Seasonal range
21.4°C
Frost days (< 0 °C)
129 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
142 d/yr
Annual snowfall
129.1 cm
Average feels-like high
2.1 °C
Average feels-like low
-1.7 °C
Average peak gust
40.4 km/h
Tropical nights (≥ 20 °C)
2 d/yr
Solar radiation
9.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °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
28.8 °C
8 August 2010
Coldest day
-30.4 °C
10 January 1987
Wettest day
62 mm
15 June 2022
Windiest day
70.9 km/h
2 October 1994
Strongest gust
103.3 km/h
29 September 1975
Hottest feels-like
31.0 °C
7 August 2010
Coldest feels-like
-39.1 °C
16 January 1940
Snowiest day
17.0 cm
23 March 1971
Sunniest day
18.0 h
17 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 | 1.1 °C | +4.4 °C | 103 mm | +57 mm |
| Feb | -3.1 °C | +0.6 °C | 15 mm | -22 mm |
| Mar | 2.4 °C | +3.3 °C | 44 mm | +7 mm |
| Apr | 5.4 °C | +2.1 °C | 64 mm | +27 mm |
| May | 10.2 °C | +2.0 °C | 77 mm | +36 mm |
| Jun | 15.4 °C | +3.0 °C | 152 mm | +101 mm |
| Jul | 21.3 °C | +3.8 °C | 44 mm | -15 mm |
| Aug | 18.7 °C | +1.3 °C | 165 mm | +80 mm |
| Sep | 16.6 °C | +3.1 °C | 63 mm | -27 mm |
| Oct | 9.2 °C | +1.8 °C | 71 mm | -15 mm |
| Nov | 5.6 °C | +2.7 °C | 105 mm | +31 mm |
| Dec | 2.4 °C | +3.0 °C | 56 mm | -3 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 Sosnovy Bor?
Sosnovy Bor has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 4.7 °C and it receives 702 mm of precipitation per year.
What is the hottest day ever recorded in Sosnovy Bor?
The hottest day measured in Sosnovy Bor between 1940 and 2025 was 8 August 2010, reaching 28.8 °C.
What is the coldest day in Sosnovy Bor?
The coldest day measured in Sosnovy Bor between 1940 and 2025 was 10 January 1987, at -30.4 °C.
Does it snow in Sosnovy Bor?
Yes. Sosnovy Bor gets on average 129.1 cm of snow per year and has around 129 frost days.
Has the climate of Sosnovy Bor warmed?
Yes: Sosnovy Bor warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sosnovy Bor?
The wettest day measured in Sosnovy Bor between 1940 and 2025 was 15 June 2022, with 62 mm of rain in 24 hours.
What was the windiest day in Sosnovy Bor?
The windiest day measured in Sosnovy Bor between 1940 and 2025 was 2 October 1994, with winds reaching 70.9 km/h.
What is the warmest month in Sosnovy Bor?
The warmest month in Sosnovy Bor is July (16.2 °C on average); the coldest is February (-5.2 °C).
How much does it rain in Sosnovy Bor?
Sosnovy Bor receives on average 702 mm of precipitation per year, spread over about 142 rainy days.
Is it sunny in Sosnovy Bor?
Sosnovy Bor gets on average 7.2 hours of sunshine per day, roughly 2,628 hours per year over 1940-2025.
What is the biggest single-day snowfall in Sosnovy Bor?
The heaviest 24-hour snowfall measured in Sosnovy Bor between 1940 and 2025 was 23 March 1971, with 17.0 cm.
Are there tropical nights in Sosnovy Bor?
Yes: Sosnovy Bor has on average 2 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sosnovy Bor?
In Sosnovy Bor, between 1940 and 2025, the highest apparent temperature reached 31.0 °C on 7 August 2010, and the lowest was -39.1 °C on 16 January 1940.
Compare Sosnovy Bor with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sosnovy Bor