Spas-Demensk climate — normals and trends
Spas-Demensk (Russia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 5.1 °C and it receives 683 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 (17.9 °C on average) and the coldest is January (-8.2 °C). Rainfall peaks in July.
Spas-Demensk averages 154 frost days, 2 hot days (≥ 30 °C) and 135 rainy days per year.
Spas-Demensk 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 169 to 139 per year over the period.
The hottest day of the period reached 37.7 °C (on 6 August 2010) and the coldest -41.7 °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
Spas-DemenskKaluga Oblast
- coords
- 54.41°, 34.02°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
5.1°C
Average daily high
8.6°C
Average daily low
1.4°C
Annual rainfall
683mm
Sunshine / day
6.7h
Mean relative humidity
79%
Average peak wind
18.4km/h
Seasonal range
26.1°C
Frost days (< 0 °C)
154 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
135 d/yr
Annual snowfall
124.3 cm
Average feels-like high
5.5 °C
Average feels-like low
-2.2 °C
Average peak gust
36.1 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.1 °C
since 1940
+0.4 °C per decade · r² = 0.53 · 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
37.7 °C
6 August 2010
Coldest day
-41.7 °C
17 January 1940
Wettest day
64 mm
26 June 1993
Windiest day
48.2 km/h
5 October 1997
Strongest gust
96.8 km/h
31 August 1986
Hottest feels-like
37.0 °C
6 August 2010
Coldest feels-like
-47.2 °C
17 January 1940
Snowiest day
22.5 cm
20 November 2004
Sunniest day
16.2 h
14 June 2023
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 | 1.6 °C | +7.3 °C | 47 mm | +10 mm |
| Feb | -2.5 °C | +2.0 °C | 10 mm | -25 mm |
| Mar | 7.6 °C | +6.8 °C | 44 mm | +5 mm |
| Apr | 12.8 °C | +3.0 °C | 72 mm | +26 mm |
| May | 16.5 °C | -0.5 °C | 58 mm | -10 mm |
| Jun | 19.8 °C | -0.8 °C | 100 mm | +20 mm |
| Jul | 25.1 °C | +2.8 °C | 136 mm | +43 mm |
| Aug | 20.7 °C | -0.5 °C | 77 mm | +3 mm |
| Sep | 17.7 °C | +2.2 °C | 14 mm | -46 mm |
| Oct | 9.4 °C | +1.1 °C | 81 mm | +25 mm |
| Nov | 4.8 °C | +3.7 °C | 73 mm | +24 mm |
| Dec | -0.3 °C | +2.9 °C | 51 mm | +7 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 Spas-Demensk?
Spas-Demensk has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 5.1 °C and it receives 683 mm of precipitation per year.
What is the hottest day ever recorded in Spas-Demensk?
The hottest day measured in Spas-Demensk between 1940 and 2025 was 6 August 2010, reaching 37.7 °C.
What is the coldest day in Spas-Demensk?
The coldest day measured in Spas-Demensk between 1940 and 2025 was 17 January 1940, at -41.7 °C.
Does it snow in Spas-Demensk?
Yes. Spas-Demensk gets on average 124.3 cm of snow per year and has around 154 frost days.
Has the climate of Spas-Demensk warmed?
Yes: Spas-Demensk warmed by +3.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Spas-Demensk?
The wettest day measured in Spas-Demensk between 1940 and 2025 was 26 June 1993, with 64 mm of rain in 24 hours.
What was the windiest day in Spas-Demensk?
The windiest day measured in Spas-Demensk between 1940 and 2025 was 5 October 1997, with winds reaching 48.2 km/h.
What is the warmest month in Spas-Demensk?
The warmest month in Spas-Demensk is July (17.9 °C on average); the coldest is January (-8.2 °C).
How much does it rain in Spas-Demensk?
Spas-Demensk receives on average 683 mm of precipitation per year, spread over about 135 rainy days.
Is it sunny in Spas-Demensk?
Spas-Demensk gets on average 6.7 hours of sunshine per day, roughly 2,446 hours per year over 1940-2025.
What is the biggest single-day snowfall in Spas-Demensk?
The heaviest 24-hour snowfall measured in Spas-Demensk between 1940 and 2025 was 20 November 2004, with 22.5 cm.
Are there tropical nights in Spas-Demensk?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Spas-Demensk.
What was the most extreme apparent temperature in Spas-Demensk?
In Spas-Demensk, between 1940 and 2025, the highest apparent temperature reached 37.0 °C on 6 August 2010, and the lowest was -47.2 °C on 17 January 1940.
Compare Spas-Demensk with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Spas-Demensk