Buy climate — normals and trends
Buy (Russia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 3.4 °C and it receives 665 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 (17.8 °C on average) and the coldest is January (-11.4 °C). Rainfall peaks in July.
Buy averages 174 frost days, 2 hot days (≥ 30 °C) and 139 rainy days per year.
Buy has warmed by +2.7 °C between 1940 and 2025, or +0.31 °C per decade. This trend is statistically significant.
The number of frost days there went from about 184 to 164 per year over the period.
The hottest day of the period reached 35.5 °C (on 8 August 2010) and the coldest -46.5 °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
BuyKostroma Oblast
- coords
- 58.48°, 41.54°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
3.4°C
Average daily high
6.9°C
Average daily low
-0.4°C
Annual rainfall
665mm
Sunshine / day
6.5h
Mean relative humidity
78%
Average peak wind
16.8km/h
Seasonal range
29.2°C
Frost days (< 0 °C)
174 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
139 d/yr
Annual snowfall
153.3 cm
Average feels-like high
3.6 °C
Average feels-like low
-4.1 °C
Average peak gust
34.9 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
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.41 · 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
35.5 °C
8 August 2010
Coldest day
-46.5 °C
10 January 1987
Wettest day
55 mm
4 June 1965
Windiest day
44.6 km/h
13 November 1983
Strongest gust
87.8 km/h
27 August 1986
Hottest feels-like
38.2 °C
7 August 2010
Coldest feels-like
-51.9 °C
10 January 1987
Snowiest day
17.9 cm
16 February 2016
Sunniest day
17.2 h
1 July 2022
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 | +7.8 °C | 54 mm | +16 mm |
| Feb | -3.8 °C | +3.0 °C | 13 mm | -20 mm |
| Mar | 5.4 °C | +5.8 °C | 38 mm | +1 mm |
| Apr | 10.1 °C | +2.0 °C | 55 mm | +12 mm |
| May | 17.1 °C | +1.4 °C | 88 mm | +26 mm |
| Jun | 19.6 °C | -0.5 °C | 78 mm | +2 mm |
| Jul | 25.0 °C | +2.7 °C | 57 mm | -23 mm |
| Aug | 20.2 °C | 0.0 °C | 122 mm | +48 mm |
| Sep | 17.0 °C | +3.2 °C | 32 mm | -33 mm |
| Oct | 7.5 °C | +1.6 °C | 46 mm | -17 mm |
| Nov | 3.0 °C | +4.3 °C | 69 mm | +18 mm |
| Dec | -1.8 °C | +4.1 °C | 46 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 Buy?
Buy has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 3.4 °C and it receives 665 mm of precipitation per year.
What is the hottest day ever recorded in Buy?
The hottest day measured in Buy between 1940 and 2025 was 8 August 2010, reaching 35.5 °C.
What is the coldest day in Buy?
The coldest day measured in Buy between 1940 and 2025 was 10 January 1987, at -46.5 °C.
Does it snow in Buy?
Yes. Buy gets on average 153.3 cm of snow per year and has around 174 frost days.
Has the climate of Buy warmed?
Yes: Buy warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Buy?
The wettest day measured in Buy between 1940 and 2025 was 4 June 1965, with 55 mm of rain in 24 hours.
What was the windiest day in Buy?
The windiest day measured in Buy between 1940 and 2025 was 13 November 1983, with winds reaching 44.6 km/h.
What is the warmest month in Buy?
The warmest month in Buy is July (17.8 °C on average); the coldest is January (-11.4 °C).
How much does it rain in Buy?
Buy receives on average 665 mm of precipitation per year, spread over about 139 rainy days.
Is it sunny in Buy?
Buy 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 Buy?
The heaviest 24-hour snowfall measured in Buy between 1940 and 2025 was 16 February 2016, with 17.9 cm.
Are there tropical nights in Buy?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Buy.
What was the most extreme apparent temperature in Buy?
In Buy, between 1940 and 2025, the highest apparent temperature reached 38.2 °C on 7 August 2010, and the lowest was -51.9 °C on 10 January 1987.
Compare Buy with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Buy