Heraclea climate — normals and trends
Heraclea (Republic of Türkiye) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 12.1 °C and it receives 327 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 (23.7 °C on average) and the coldest is January (0.4 °C). Rainfall peaks in March.
Heraclea averages 84 frost days, 39 hot days (≥ 30 °C) and 64 rainy days per year.
Heraclea has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.
The number of frost days there went from about 99 to 69 per year over the period.
The hottest day of the period reached 39.4 °C (on 30 July 2000) and the coldest -23.3 °C (on 5 February 1950).
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
HeracleaKonya
- coords
- 37.51°, 34.05°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
12.1°C
Average daily high
17.9°C
Average daily low
6.6°C
Annual rainfall
327mm
Sunshine / day
10.8h
Mean relative humidity
51%
Average peak wind
12.2km/h
Seasonal range
23.3°C
Frost days (< 0 °C)
84 d/yr
Hot days (≥ 30 °C)
39 d/yr
Rainy days (≥ 1 mm)
64 d/yr
Annual snowfall
61.1 cm
Average feels-like high
15.5 °C
Average feels-like low
3.7 °C
Average peak gust
28.9 km/h
Tropical nights (≥ 20 °C)
8 d/yr
Solar radiation
18.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.41 · 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
39.4 °C
30 July 2000
Coldest day
-23.3 °C
5 February 1950
Wettest day
60 mm
26 December 1968
Windiest day
48.3 km/h
25 March 2008
Strongest gust
103.7 km/h
11 April 1990
Hottest feels-like
39.8 °C
30 July 2000
Coldest feels-like
-28.3 °C
5 February 1997
Snowiest day
30.4 cm
26 December 1968
Sunniest day
14.1 h
26 June 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 | 10.5 °C | +5.2 °C | 14 mm | -28 mm |
| Feb | 4.4 °C | -2.6 °C | 42 mm | +5 mm |
| Mar | 16.1 °C | +4.8 °C | 18 mm | -30 mm |
| Apr | 17.4 °C | +0.3 °C | 46 mm | +2 mm |
| May | 24.2 °C | +2.3 °C | 45 mm | +8 mm |
| Jun | 27.3 °C | +1.0 °C | 12 mm | -3 mm |
| Jul | 32.6 °C | +2.9 °C | 0 mm | -2 mm |
| Aug | 32.2 °C | +2.5 °C | 2 mm | +1 mm |
| Sep | 26.2 °C | +0.5 °C | 1 mm | -5 mm |
| Oct | 20.8 °C | +1.0 °C | 8 mm | -11 mm |
| Nov | 17.9 °C | +4.5 °C | 13 mm | -20 mm |
| Dec | 8.5 °C | +1.1 °C | 55 mm | +11 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 Heraclea?
Heraclea has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 12.1 °C and it receives 327 mm of precipitation per year.
What is the hottest day ever recorded in Heraclea?
The hottest day measured in Heraclea between 1940 and 2025 was 30 July 2000, reaching 39.4 °C.
What is the coldest day in Heraclea?
The coldest day measured in Heraclea between 1940 and 2025 was 5 February 1950, at -23.3 °C.
Does it snow in Heraclea?
Yes. Heraclea gets on average 61.1 cm of snow per year and has around 84 frost days.
Has the climate of Heraclea warmed?
Yes: Heraclea warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Heraclea?
The wettest day measured in Heraclea between 1940 and 2025 was 26 December 1968, with 60 mm of rain in 24 hours.
What was the windiest day in Heraclea?
The windiest day measured in Heraclea between 1940 and 2025 was 25 March 2008, with winds reaching 48.3 km/h.
What is the warmest month in Heraclea?
The warmest month in Heraclea is July (23.7 °C on average); the coldest is January (0.4 °C).
How much does it rain in Heraclea?
Heraclea receives on average 327 mm of precipitation per year, spread over about 64 rainy days.
Is it sunny in Heraclea?
Heraclea gets on average 10.8 hours of sunshine per day, roughly 3,942 hours per year over 1940-2025.
What is the biggest single-day snowfall in Heraclea?
The heaviest 24-hour snowfall measured in Heraclea between 1940 and 2025 was 26 December 1968, with 30.4 cm.
Are there tropical nights in Heraclea?
Yes: Heraclea has on average 8 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Heraclea?
In Heraclea, between 1940 and 2025, the highest apparent temperature reached 39.8 °C on 30 July 2000, and the lowest was -28.3 °C on 5 February 1997.
Compare Heraclea with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Heraclea