Stara Zagora climate — normals and trends
Stara Zagora (Bulgaria) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 11.6 °C and it receives 678 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 (0.2 °C). Rainfall peaks in May.
Stara Zagora averages 74 frost days, 21 hot days (≥ 30 °C) and 110 rainy days per year.
Stara Zagora has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The number of frost days there went from about 88 to 60 per year over the period.
The hottest day of the period reached 40.5 °C (on 22 July 2025) and the coldest -24.6 °C (on 25 January 1942).
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
Stara ZagoraStara Zagora
- coords
- 42.43°, 25.64°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.6°C
Average daily high
16.4°C
Average daily low
7.3°C
Annual rainfall
678mm
Sunshine / day
9.5h
Mean relative humidity
73%
Average peak wind
11.3km/h
Seasonal range
22.2°C
Frost days (< 0 °C)
74 d/yr
Hot days (≥ 30 °C)
21 d/yr
Rainy days (≥ 1 mm)
110 d/yr
Annual snowfall
57.9 cm
Average feels-like high
15.2 °C
Average feels-like low
5.7 °C
Average peak gust
28.5 km/h
Tropical nights (≥ 20 °C)
6 d/yr
Solar radiation
14.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.45 · 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
40.5 °C
22 July 2025
Coldest day
-24.6 °C
25 January 1942
Wettest day
69 mm
3 July 2005
Windiest day
38.0 km/h
29 March 1940
Strongest gust
105.1 km/h
1 January 1971
Hottest feels-like
42.3 °C
24 July 2007
Coldest feels-like
-28.8 °C
24 January 1942
Snowiest day
27.4 cm
2 January 1969
Sunniest day
14.9 h
26 June 1942
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 | 8.7 °C | +4.9 °C | 19 mm | -31 mm |
| Feb | 5.0 °C | -1.4 °C | 28 mm | -19 mm |
| Mar | 15.8 °C | +5.5 °C | 40 mm | -14 mm |
| Apr | 16.4 °C | +0.4 °C | 64 mm | -3 mm |
| May | 21.4 °C | +0.5 °C | 102 mm | +19 mm |
| Jun | 30.2 °C | +5.1 °C | 18 mm | -58 mm |
| Jul | 33.8 °C | +6.0 °C | 24 mm | -30 mm |
| Aug | 30.8 °C | +2.7 °C | 43 mm | +4 mm |
| Sep | 26.4 °C | +2.6 °C | 15 mm | -23 mm |
| Oct | 16.5 °C | -1.0 °C | 155 mm | +106 mm |
| Nov | 14.7 °C | +3.8 °C | 95 mm | +36 mm |
| Dec | 8.4 °C | +2.8 °C | 40 mm | -23 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 Stara Zagora?
Stara Zagora has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 11.6 °C and it receives 678 mm of precipitation per year.
What is the hottest day ever recorded in Stara Zagora?
The hottest day measured in Stara Zagora between 1940 and 2025 was 22 July 2025, reaching 40.5 °C.
What is the coldest day in Stara Zagora?
The coldest day measured in Stara Zagora between 1940 and 2025 was 25 January 1942, at -24.6 °C.
Does it snow in Stara Zagora?
Yes. Stara Zagora gets on average 57.9 cm of snow per year and has around 74 frost days.
Has the climate of Stara Zagora warmed?
Yes: Stara Zagora warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Stara Zagora?
The wettest day measured in Stara Zagora between 1940 and 2025 was 3 July 2005, with 69 mm of rain in 24 hours.
What was the windiest day in Stara Zagora?
The windiest day measured in Stara Zagora between 1940 and 2025 was 29 March 1940, with winds reaching 38.0 km/h.
What is the warmest month in Stara Zagora?
The warmest month in Stara Zagora is July (22.4 °C on average); the coldest is January (0.2 °C).
How much does it rain in Stara Zagora?
Stara Zagora receives on average 678 mm of precipitation per year, spread over about 110 rainy days.
Is it sunny in Stara Zagora?
Stara Zagora gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.
What is the biggest single-day snowfall in Stara Zagora?
The heaviest 24-hour snowfall measured in Stara Zagora between 1940 and 2025 was 2 January 1969, with 27.4 cm.
Are there tropical nights in Stara Zagora?
Yes: Stara Zagora has on average 6 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Stara Zagora?
In Stara Zagora, between 1940 and 2025, the highest apparent temperature reached 42.3 °C on 24 July 2007, and the lowest was -28.8 °C on 24 January 1942.
Compare Stara Zagora with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Stara Zagora