Chirpan climate — normals and trends
Chirpan (Bulgaria) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 12.4 °C and it receives 584 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 (23.6 °C on average) and the coldest is January (0.4 °C). Rainfall peaks in May.
Chirpan averages 74 frost days, 38 hot days (≥ 30 °C) and 94 rainy days per year.
Chirpan has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The number of frost days there went from about 87 to 61 per year over the period.
The hottest day of the period reached 41.3 °C (on 20 August 1945) and the coldest -25.6 °C (on 24 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
ChirpanStara Zagora
- coords
- 42.20°, 25.33°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
12.4°C
Average daily high
17.6°C
Average daily low
7.6°C
Annual rainfall
584mm
Sunshine / day
9.5h
Mean relative humidity
71%
Average peak wind
11.8km/h
Seasonal range
23.2°C
Frost days (< 0 °C)
74 d/yr
Hot days (≥ 30 °C)
38 d/yr
Rainy days (≥ 1 mm)
94 d/yr
Annual snowfall
49.6 cm
Average feels-like high
16.6 °C
Average feels-like low
5.9 °C
Average peak gust
25.8 km/h
Tropical nights (≥ 20 °C)
10 d/yr
Solar radiation
14.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.40 · 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
41.3 °C
20 August 1945
Coldest day
-25.6 °C
24 January 1942
Wettest day
103 mm
27 September 2001
Windiest day
39.0 km/h
13 February 1944
Strongest gust
81.7 km/h
1 January 1971
Hottest feels-like
43.1 °C
1 July 2017
Coldest feels-like
-30.1 °C
25 January 1942
Snowiest day
28.1 cm
7 March 2015
Sunniest day
14.9 h
16 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 | 8.8 °C | +4.3 °C | 21 mm | -23 mm |
| Feb | 6.6 °C | -0.9 °C | 24 mm | -17 mm |
| Mar | 16.8 °C | +5.1 °C | 49 mm | -2 mm |
| Apr | 17.8 °C | +0.4 °C | 64 mm | +8 mm |
| May | 22.7 °C | +0.4 °C | 102 mm | +35 mm |
| Jun | 31.9 °C | +5.3 °C | 41 mm | -20 mm |
| Jul | 34.3 °C | +4.9 °C | 18 mm | -29 mm |
| Aug | 32.0 °C | +2.4 °C | 36 mm | +3 mm |
| Sep | 28.1 °C | +2.9 °C | 14 mm | -20 mm |
| Oct | 17.4 °C | -1.3 °C | 142 mm | +97 mm |
| Nov | 15.7 °C | +3.8 °C | 62 mm | +12 mm |
| Dec | 9.4 °C | +3.1 °C | 53 mm | -5 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 Chirpan?
Chirpan has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 12.4 °C and it receives 584 mm of precipitation per year.
What is the hottest day ever recorded in Chirpan?
The hottest day measured in Chirpan between 1940 and 2025 was 20 August 1945, reaching 41.3 °C.
What is the coldest day in Chirpan?
The coldest day measured in Chirpan between 1940 and 2025 was 24 January 1942, at -25.6 °C.
Does it snow in Chirpan?
Yes. Chirpan gets on average 49.6 cm of snow per year and has around 74 frost days.
Has the climate of Chirpan warmed?
Yes: Chirpan warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Chirpan?
The wettest day measured in Chirpan between 1940 and 2025 was 27 September 2001, with 103 mm of rain in 24 hours.
What was the windiest day in Chirpan?
The windiest day measured in Chirpan between 1940 and 2025 was 13 February 1944, with winds reaching 39.0 km/h.
What is the warmest month in Chirpan?
The warmest month in Chirpan is July (23.6 °C on average); the coldest is January (0.4 °C).
How much does it rain in Chirpan?
Chirpan receives on average 584 mm of precipitation per year, spread over about 94 rainy days.
Is it sunny in Chirpan?
Chirpan 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 Chirpan?
The heaviest 24-hour snowfall measured in Chirpan between 1940 and 2025 was 7 March 2015, with 28.1 cm.
Are there tropical nights in Chirpan?
Yes: Chirpan has on average 10 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Chirpan?
In Chirpan, between 1940 and 2025, the highest apparent temperature reached 43.1 °C on 1 July 2017, and the lowest was -30.1 °C on 25 January 1942.
Compare Chirpan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Chirpan