Ostashkov climate — normals and trends
Ostashkov (Russia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 4.4 °C and it receives 725 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 (17.4 °C on average) and the coldest is January (-8.4 °C). Rainfall peaks in July.
Ostashkov averages 156 frost days, 1 hot days (≥ 30 °C) and 148 rainy days per year.
Ostashkov 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 171 to 141 per year over the period.
The hottest day of the period reached 34.1 °C (on 28 July 2010) and the coldest -39.8 °C (on 16 January 1940).
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
OstashkovTver Oblast
- coords
- 57.15°, 33.11°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
4.4°C
Average daily high
7.3°C
Average daily low
1.4°C
Annual rainfall
725mm
Sunshine / day
6.5h
Mean relative humidity
81%
Average peak wind
18.0km/h
Seasonal range
25.8°C
Frost days (< 0 °C)
156 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
148 d/yr
Annual snowfall
144.8 cm
Average feels-like high
4.2 °C
Average feels-like low
-2.2 °C
Average peak gust
35.3 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.8 °C
since 1940
+0.3 °C per decade · r² = 0.47 · 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
34.1 °C
28 July 2010
Coldest day
-39.8 °C
16 January 1940
Wettest day
78 mm
9 August 2019
Windiest day
46.7 km/h
3 December 1961
Strongest gust
108.7 km/h
7 August 1987
Hottest feels-like
35.5 °C
7 August 2010
Coldest feels-like
-45.7 °C
16 January 1940
Snowiest day
23.9 cm
19 October 1992
Sunniest day
17.1 h
23 June 2020
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 | 0.7 °C | +6.9 °C | 78 mm | +37 mm |
| Feb | -2.9 °C | +2.2 °C | 16 mm | -18 mm |
| Mar | 5.9 °C | +5.7 °C | 52 mm | +12 mm |
| Apr | 10.4 °C | +3.0 °C | 54 mm | +11 mm |
| May | 14.8 °C | -0.1 °C | 83 mm | +18 mm |
| Jun | 18.1 °C | -0.9 °C | 136 mm | +53 mm |
| Jul | 24.3 °C | +3.4 °C | 114 mm | +20 mm |
| Aug | 19.2 °C | -0.2 °C | 106 mm | +20 mm |
| Sep | 17.0 °C | +3.1 °C | 41 mm | -30 mm |
| Oct | 7.9 °C | +0.9 °C | 61 mm | -5 mm |
| Nov | 3.2 °C | +2.9 °C | 60 mm | +5 mm |
| Dec | 0.0 °C | +3.7 °C | 64 mm | +16 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 Ostashkov?
Ostashkov has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 4.4 °C and it receives 725 mm of precipitation per year.
What is the hottest day ever recorded in Ostashkov?
The hottest day measured in Ostashkov between 1940 and 2025 was 28 July 2010, reaching 34.1 °C.
What is the coldest day in Ostashkov?
The coldest day measured in Ostashkov between 1940 and 2025 was 16 January 1940, at -39.8 °C.
Does it snow in Ostashkov?
Yes. Ostashkov gets on average 144.8 cm of snow per year and has around 156 frost days.
Has the climate of Ostashkov warmed?
Yes: Ostashkov warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ostashkov?
The wettest day measured in Ostashkov between 1940 and 2025 was 9 August 2019, with 78 mm of rain in 24 hours.
What was the windiest day in Ostashkov?
The windiest day measured in Ostashkov between 1940 and 2025 was 3 December 1961, with winds reaching 46.7 km/h.
What is the warmest month in Ostashkov?
The warmest month in Ostashkov is July (17.4 °C on average); the coldest is January (-8.4 °C).
How much does it rain in Ostashkov?
Ostashkov receives on average 725 mm of precipitation per year, spread over about 148 rainy days.
Is it sunny in Ostashkov?
Ostashkov gets on average 6.5 hours of sunshine per day, roughly 2,373 hours per year over 1940-2025.
What is the biggest single-day snowfall in Ostashkov?
The heaviest 24-hour snowfall measured in Ostashkov between 1940 and 2025 was 19 October 1992, with 23.9 cm.
Are there tropical nights in Ostashkov?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Ostashkov.
What was the most extreme apparent temperature in Ostashkov?
In Ostashkov, between 1940 and 2025, the highest apparent temperature reached 35.5 °C on 7 August 2010, and the lowest was -45.7 °C on 16 January 1940.
Compare Ostashkov with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ostashkov