Tosno climate — normals and trends
Tosno (Russia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 4.5 °C and it receives 667 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 (-8.1 °C). Rainfall peaks in August.
Tosno averages 159 frost days, 2 hot days (≥ 30 °C) and 140 rainy days per year.
Tosno has warmed by +2.8 °C between 1940 and 2025, or +0.33 °C per decade. This trend is statistically significant.
The number of frost days there went from about 176 to 142 per year over the period.
The hottest day of the period reached 35.8 °C (on 28 July 2010) and the coldest -42.1 °C (on 30 December 1978).
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
TosnoLeningradskaya Oblast'
- coords
- 59.54°, 30.88°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
4.5°C
Average daily high
8.2°C
Average daily low
0.7°C
Annual rainfall
667mm
Sunshine / day
7.0h
Mean relative humidity
80%
Average peak wind
15.6km/h
Seasonal range
25.6°C
Frost days (< 0 °C)
159 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
140 d/yr
Annual snowfall
120.4 cm
Average feels-like high
5.2 °C
Average feels-like low
-2.7 °C
Average peak gust
35.0 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.8 °C
since 1940
+0.3 °C per decade · r² = 0.42 · 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
35.8 °C
28 July 2010
Coldest day
-42.1 °C
30 December 1978
Wettest day
60 mm
20 August 1990
Windiest day
38.1 km/h
13 March 1992
Strongest gust
96.5 km/h
15 April 2001
Hottest feels-like
36.9 °C
28 July 2010
Coldest feels-like
-47.4 °C
10 January 1987
Snowiest day
20.7 cm
23 March 1971
Sunniest day
18.0 h
6 July 1946
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 | 1.0 °C | +6.6 °C | 83 mm | +47 mm |
| Feb | -2.8 °C | +1.7 °C | 30 mm | -0 mm |
| Mar | 5.8 °C | +4.7 °C | 52 mm | +18 mm |
| Apr | 9.9 °C | +1.1 °C | 55 mm | +11 mm |
| May | 15.3 °C | -0.3 °C | 92 mm | +36 mm |
| Jun | 18.5 °C | -1.5 °C | 161 mm | +85 mm |
| Jul | 25.4 °C | +3.3 °C | 79 mm | -6 mm |
| Aug | 20.1 °C | -0.2 °C | 99 mm | +13 mm |
| Sep | 18.1 °C | +3.5 °C | 25 mm | -39 mm |
| Oct | 8.7 °C | +1.1 °C | 34 mm | -27 mm |
| Nov | 3.9 °C | +2.9 °C | 60 mm | +8 mm |
| Dec | 1.1 °C | +4.0 °C | 57 mm | +13 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 Tosno?
Tosno has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 4.5 °C and it receives 667 mm of precipitation per year.
What is the hottest day ever recorded in Tosno?
The hottest day measured in Tosno between 1940 and 2025 was 28 July 2010, reaching 35.8 °C.
What is the coldest day in Tosno?
The coldest day measured in Tosno between 1940 and 2025 was 30 December 1978, at -42.1 °C.
Does it snow in Tosno?
Yes. Tosno gets on average 120.4 cm of snow per year and has around 159 frost days.
Has the climate of Tosno warmed?
Yes: Tosno warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Tosno?
The wettest day measured in Tosno between 1940 and 2025 was 20 August 1990, with 60 mm of rain in 24 hours.
What was the windiest day in Tosno?
The windiest day measured in Tosno between 1940 and 2025 was 13 March 1992, with winds reaching 38.1 km/h.
What is the warmest month in Tosno?
The warmest month in Tosno is July (17.5 °C on average); the coldest is January (-8.1 °C).
How much does it rain in Tosno?
Tosno receives on average 667 mm of precipitation per year, spread over about 140 rainy days.
Is it sunny in Tosno?
Tosno gets on average 7.0 hours of sunshine per day, roughly 2,555 hours per year over 1940-2025.
What is the biggest single-day snowfall in Tosno?
The heaviest 24-hour snowfall measured in Tosno between 1940 and 2025 was 23 March 1971, with 20.7 cm.
Are there tropical nights in Tosno?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Tosno.
What was the most extreme apparent temperature in Tosno?
In Tosno, between 1940 and 2025, the highest apparent temperature reached 36.9 °C on 28 July 2010, and the lowest was -47.4 °C on 10 January 1987.
Compare Tosno with another city
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Nearby cities
The climate around Tosno