Syanno climate — normals and trends
Syanno (Belarus) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 5.7 °C and it receives 705 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 (-6.7 °C). Rainfall peaks in July.
Syanno averages 141 frost days, 2 hot days (≥ 30 °C) and 140 rainy days per year.
Syanno has warmed by +3.1 °C between 1940 and 2025, or +0.37 °C per decade. This trend is statistically significant.
The number of frost days there went from about 161 to 121 per year over the period.
The hottest day of the period reached 36.2 °C (on 8 August 2010) and the coldest -38.0 °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
SyannoVitebsk
- coords
- 54.81°, 29.70°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
5.7°C
Average daily high
9.2°C
Average daily low
2.2°C
Annual rainfall
705mm
Sunshine / day
6.9h
Mean relative humidity
79%
Average peak wind
18.1km/h
Seasonal range
24.6°C
Frost days (< 0 °C)
141 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
140 d/yr
Annual snowfall
116.8 cm
Average feels-like high
6.2 °C
Average feels-like low
-1.3 °C
Average peak gust
36.1 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.1 °C
since 1940
+0.4 °C per decade · r² = 0.54 · 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
36.2 °C
8 August 2010
Coldest day
-38.0 °C
17 January 1940
Wettest day
62 mm
23 July 1993
Windiest day
45.5 km/h
14 January 2022
Strongest gust
96.5 km/h
4 December 1999
Hottest feels-like
36.9 °C
22 July 2010
Coldest feels-like
-43.7 °C
16 January 1940
Snowiest day
17.2 cm
2 April 1989
Sunniest day
16.0 h
3 July 2025
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 | 2.1 °C | +6.5 °C | 47 mm | +6 mm |
| Feb | -2.2 °C | +1.1 °C | 13 mm | -25 mm |
| Mar | 8.7 °C | +6.9 °C | 48 mm | +6 mm |
| Apr | 13.6 °C | +3.4 °C | 30 mm | -18 mm |
| May | 15.0 °C | -2.0 °C | 147 mm | +79 mm |
| Jun | 19.8 °C | -0.8 °C | 120 mm | +37 mm |
| Jul | 24.4 °C | +2.2 °C | 125 mm | +35 mm |
| Aug | 21.2 °C | -0.1 °C | 51 mm | -26 mm |
| Sep | 19.0 °C | +3.2 °C | 23 mm | -42 mm |
| Oct | 9.6 °C | +0.7 °C | 69 mm | +13 mm |
| Nov | 4.7 °C | +2.6 °C | 73 mm | +21 mm |
| Dec | 1.4 °C | +3.4 °C | 42 mm | -4 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 Syanno?
Syanno has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 5.7 °C and it receives 705 mm of precipitation per year.
What is the hottest day ever recorded in Syanno?
The hottest day measured in Syanno between 1940 and 2025 was 8 August 2010, reaching 36.2 °C.
What is the coldest day in Syanno?
The coldest day measured in Syanno between 1940 and 2025 was 17 January 1940, at -38.0 °C.
Does it snow in Syanno?
Yes. Syanno gets on average 116.8 cm of snow per year and has around 141 frost days.
Has the climate of Syanno warmed?
Yes: Syanno warmed by +3.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Syanno?
The wettest day measured in Syanno between 1940 and 2025 was 23 July 1993, with 62 mm of rain in 24 hours.
What was the windiest day in Syanno?
The windiest day measured in Syanno between 1940 and 2025 was 14 January 2022, with winds reaching 45.5 km/h.
What is the warmest month in Syanno?
The warmest month in Syanno is July (17.9 °C on average); the coldest is January (-6.7 °C).
How much does it rain in Syanno?
Syanno receives on average 705 mm of precipitation per year, spread over about 140 rainy days.
Is it sunny in Syanno?
Syanno gets on average 6.9 hours of sunshine per day, roughly 2,519 hours per year over 1940-2025.
What is the biggest single-day snowfall in Syanno?
The heaviest 24-hour snowfall measured in Syanno between 1940 and 2025 was 2 April 1989, with 17.2 cm.
Are there tropical nights in Syanno?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Syanno.
What was the most extreme apparent temperature in Syanno?
In Syanno, between 1940 and 2025, the highest apparent temperature reached 36.9 °C on 22 July 2010, and the lowest was -43.7 °C on 16 January 1940.
Compare Syanno with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Syanno