Istra climate — normals and trends
Istra (Russia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 4.6 °C and it receives 675 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 (18.1 °C on average) and the coldest is January (-9.2 °C). Rainfall peaks in July.
Istra averages 160 frost days, 2 hot days (≥ 30 °C) and 138 rainy days per year.
Istra has warmed by +3.1 °C between 1940 and 2025, or +0.36 °C per decade. This trend is statistically significant.
The number of frost days there went from about 175 to 145 per year over the period.
The hottest day of the period reached 37.3 °C (on 7 August 2010) and the coldest -41.8 °C (on 17 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
IstraMoscow Oblast
- coords
- 55.92°, 36.87°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
4.6°C
Average daily high
8.1°C
Average daily low
1.0°C
Annual rainfall
675mm
Sunshine / day
6.8h
Mean relative humidity
78%
Average peak wind
17.3km/h
Seasonal range
27.3°C
Frost days (< 0 °C)
160 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
138 d/yr
Annual snowfall
135.1 cm
Average feels-like high
4.9 °C
Average feels-like low
-2.6 °C
Average peak gust
35.8 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
9.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.1 °C
since 1940
+0.4 °C per decade · r² = 0.51 · 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
37.3 °C
7 August 2010
Coldest day
-41.8 °C
17 January 1940
Wettest day
56 mm
6 July 1965
Windiest day
44.6 km/h
24 September 1943
Strongest gust
96.5 km/h
11 January 1991
Hottest feels-like
38.8 °C
6 August 2010
Coldest feels-like
-47.6 °C
17 January 1940
Snowiest day
19.0 cm
14 December 1981
Sunniest day
17.0 h
26 June 1951
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 | 0.9 °C | +7.5 °C | 43 mm | +7 mm |
| Feb | -2.8 °C | +2.4 °C | 8 mm | -25 mm |
| Mar | 7.1 °C | +6.6 °C | 35 mm | -2 mm |
| Apr | 12.1 °C | +2.9 °C | 65 mm | +22 mm |
| May | 16.9 °C | +0.3 °C | 88 mm | +20 mm |
| Jun | 19.4 °C | -1.1 °C | 129 mm | +50 mm |
| Jul | 25.4 °C | +3.0 °C | 105 mm | +17 mm |
| Aug | 20.2 °C | -0.7 °C | 107 mm | +31 mm |
| Sep | 17.3 °C | +2.4 °C | 13 mm | -51 mm |
| Oct | 8.6 °C | +1.2 °C | 77 mm | +17 mm |
| Nov | 4.4 °C | +4.2 °C | 74 mm | +25 mm |
| Dec | -0.6 °C | +3.5 °C | 45 mm | +1 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 Istra?
Istra has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 4.6 °C and it receives 675 mm of precipitation per year.
What is the hottest day ever recorded in Istra?
The hottest day measured in Istra between 1940 and 2025 was 7 August 2010, reaching 37.3 °C.
What is the coldest day in Istra?
The coldest day measured in Istra between 1940 and 2025 was 17 January 1940, at -41.8 °C.
Does it snow in Istra?
Yes. Istra gets on average 135.1 cm of snow per year and has around 160 frost days.
Has the climate of Istra warmed?
Yes: Istra warmed by +3.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Istra?
The wettest day measured in Istra between 1940 and 2025 was 6 July 1965, with 56 mm of rain in 24 hours.
What was the windiest day in Istra?
The windiest day measured in Istra between 1940 and 2025 was 24 September 1943, with winds reaching 44.6 km/h.
What is the warmest month in Istra?
The warmest month in Istra is July (18.1 °C on average); the coldest is January (-9.2 °C).
How much does it rain in Istra?
Istra receives on average 675 mm of precipitation per year, spread over about 138 rainy days.
Is it sunny in Istra?
Istra gets on average 6.8 hours of sunshine per day, roughly 2,482 hours per year over 1940-2025.
What is the biggest single-day snowfall in Istra?
The heaviest 24-hour snowfall measured in Istra between 1940 and 2025 was 14 December 1981, with 19.0 cm.
Are there tropical nights in Istra?
Yes: Istra has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Istra?
In Istra, between 1940 and 2025, the highest apparent temperature reached 38.8 °C on 6 August 2010, and the lowest was -47.6 °C on 17 January 1940.
Compare Istra with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Istra