Siyǝzǝn climate — normals and trends
Siyǝzǝn (Azerbaijan) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 10.8 °C and it receives 498 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 (22.4 °C on average) and the coldest is January (-0.4 °C). Rainfall peaks in October.
Siyǝzǝn averages 86 frost days, 19 hot days (≥ 30 °C) and 104 rainy days per year.
Siyǝzǝn has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The number of frost days there went from about 102 to 70 per year over the period.
The hottest day of the period reached 40.0 °C (on 1 July 2018) and the coldest -19.4 °C (on 13 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
SiyǝzǝnSiyǝzǝn
- coords
- 41.08°, 49.12°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.8°C
Average daily high
15.2°C
Average daily low
7.0°C
Annual rainfall
498mm
Sunshine / day
9.2h
Mean relative humidity
73%
Average peak wind
11.8km/h
Seasonal range
22.8°C
Frost days (< 0 °C)
86 d/yr
Hot days (≥ 30 °C)
19 d/yr
Rainy days (≥ 1 mm)
104 d/yr
Annual snowfall
95.2 cm
Average feels-like high
13.9 °C
Average feels-like low
4.8 °C
Average peak gust
34.2 km/h
Tropical nights (≥ 20 °C)
10 d/yr
Solar radiation
14.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.29 · 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
40.0 °C
1 July 2018
Coldest day
-19.4 °C
13 January 1940
Wettest day
74 mm
16 April 2025
Windiest day
31.1 km/h
13 January 1968
Strongest gust
87.5 km/h
13 April 1950
Hottest feels-like
41.0 °C
31 July 2011
Coldest feels-like
-24.3 °C
13 January 1940
Snowiest day
21.7 cm
5 February 2010
Sunniest day
14.1 h
3 July 1941
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 | 7.7 °C | +4.3 °C | 19 mm | -19 mm |
| Feb | 1.7 °C | -2.3 °C | 46 mm | +5 mm |
| Mar | 13.4 °C | +5.5 °C | 22 mm | -27 mm |
| Apr | 15.6 °C | +1.3 °C | 113 mm | +64 mm |
| May | 21.1 °C | +1.4 °C | 35 mm | -13 mm |
| Jun | 24.1 °C | -0.3 °C | 24 mm | -11 mm |
| Jul | 28.5 °C | +1.2 °C | 12 mm | -12 mm |
| Aug | 29.6 °C | +2.3 °C | 12 mm | -12 mm |
| Sep | 20.7 °C | -1.7 °C | 74 mm | +30 mm |
| Oct | 18.0 °C | +1.7 °C | 45 mm | -12 mm |
| Nov | 14.9 °C | +4.7 °C | 11 mm | -38 mm |
| Dec | 6.3 °C | +0.9 °C | 58 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 Siyǝzǝn?
Siyǝzǝn has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 10.8 °C and it receives 498 mm of precipitation per year.
What is the hottest day ever recorded in Siyǝzǝn?
The hottest day measured in Siyǝzǝn between 1940 and 2025 was 1 July 2018, reaching 40.0 °C.
What is the coldest day in Siyǝzǝn?
The coldest day measured in Siyǝzǝn between 1940 and 2025 was 13 January 1940, at -19.4 °C.
Does it snow in Siyǝzǝn?
Yes. Siyǝzǝn gets on average 95.2 cm of snow per year and has around 86 frost days.
Has the climate of Siyǝzǝn warmed?
Yes: Siyǝzǝn warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Siyǝzǝn?
The wettest day measured in Siyǝzǝn between 1940 and 2025 was 16 April 2025, with 74 mm of rain in 24 hours.
What was the windiest day in Siyǝzǝn?
The windiest day measured in Siyǝzǝn between 1940 and 2025 was 13 January 1968, with winds reaching 31.1 km/h.
What is the warmest month in Siyǝzǝn?
The warmest month in Siyǝzǝn is July (22.4 °C on average); the coldest is January (-0.4 °C).
How much does it rain in Siyǝzǝn?
Siyǝzǝn receives on average 498 mm of precipitation per year, spread over about 104 rainy days.
Is it sunny in Siyǝzǝn?
Siyǝzǝn gets on average 9.2 hours of sunshine per day, roughly 3,358 hours per year over 1940-2025.
What is the biggest single-day snowfall in Siyǝzǝn?
The heaviest 24-hour snowfall measured in Siyǝzǝn between 1940 and 2025 was 5 February 2010, with 21.7 cm.
Are there tropical nights in Siyǝzǝn?
Yes: Siyǝzǝn has on average 10 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Siyǝzǝn?
In Siyǝzǝn, between 1940 and 2025, the highest apparent temperature reached 41.0 °C on 31 July 2011, and the lowest was -24.3 °C on 13 January 1940.
Compare Siyǝzǝn with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Siyǝzǝn