Bilecik climate — normals and trends
Bilecik (Republic of Türkiye) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 12.7 °C and it receives 533 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 August (22.7 °C on average) and the coldest is January (2.4 °C). Rainfall peaks in December.
Bilecik averages 58 frost days, 36 hot days (≥ 30 °C) and 102 rainy days per year.
Bilecik has warmed by +2.8 °C between 1940 and 2025, or +0.33 °C per decade. This trend is statistically significant.
The number of frost days there went from about 74 to 42 per year over the period.
The hottest day of the period reached 41.3 °C (on 13 July 2000) and the coldest -24.1 °C (on 31 December 1941).
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
BilecikBilecik
- coords
- 40.14°, 29.98°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
12.7°C
Average daily high
18.2°C
Average daily low
7.8°C
Annual rainfall
533mm
Sunshine / day
9.2h
Mean relative humidity
72%
Average peak wind
10.9km/h
Seasonal range
20.3°C
Frost days (< 0 °C)
58 d/yr
Hot days (≥ 30 °C)
36 d/yr
Rainy days (≥ 1 mm)
102 d/yr
Annual snowfall
59.4 cm
Average feels-like high
17.2 °C
Average feels-like low
6.3 °C
Average peak gust
30.7 km/h
Tropical nights (≥ 20 °C)
6 d/yr
Solar radiation
15.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.8 °C
since 1940
+0.3 °C per decade · r² = 0.62 · 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
13 July 2000
Coldest day
-24.1 °C
31 December 1941
Wettest day
80 mm
3 July 1959
Windiest day
33.0 km/h
3 April 1979
Strongest gust
97.9 km/h
26 February 1973
Hottest feels-like
42.6 °C
29 July 2000
Coldest feels-like
-28.8 °C
31 December 1941
Snowiest day
19.9 cm
17 December 2003
Sunniest day
14.1 h
24 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 | 11.4 °C | +4.9 °C | 46 mm | -15 mm |
| Feb | 6.8 °C | -1.6 °C | 46 mm | -12 mm |
| Mar | 18.6 °C | +6.8 °C | 30 mm | -33 mm |
| Apr | 16.6 °C | -0.5 °C | 58 mm | -0 mm |
| May | 24.0 °C | +2.2 °C | 40 mm | -10 mm |
| Jun | 30.0 °C | +4.1 °C | 2 mm | -33 mm |
| Jul | 34.1 °C | +5.4 °C | 2 mm | -17 mm |
| Aug | 32.2 °C | +3.0 °C | 6 mm | -8 mm |
| Sep | 27.2 °C | +1.7 °C | 23 mm | +0 mm |
| Oct | 20.5 °C | +0.4 °C | 75 mm | +36 mm |
| Nov | 19.0 °C | +4.6 °C | 25 mm | -24 mm |
| Dec | 9.7 °C | +1.0 °C | 69 mm | +3 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 Bilecik?
Bilecik has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 12.7 °C and it receives 533 mm of precipitation per year.
What is the hottest day ever recorded in Bilecik?
The hottest day measured in Bilecik between 1940 and 2025 was 13 July 2000, reaching 41.3 °C.
What is the coldest day in Bilecik?
The coldest day measured in Bilecik between 1940 and 2025 was 31 December 1941, at -24.1 °C.
Does it snow in Bilecik?
Yes. Bilecik gets on average 59.4 cm of snow per year and has around 58 frost days.
Has the climate of Bilecik warmed?
Yes: Bilecik warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bilecik?
The wettest day measured in Bilecik between 1940 and 2025 was 3 July 1959, with 80 mm of rain in 24 hours.
What was the windiest day in Bilecik?
The windiest day measured in Bilecik between 1940 and 2025 was 3 April 1979, with winds reaching 33.0 km/h.
What is the warmest month in Bilecik?
The warmest month in Bilecik is August (22.7 °C on average); the coldest is January (2.4 °C).
How much does it rain in Bilecik?
Bilecik receives on average 533 mm of precipitation per year, spread over about 102 rainy days.
Is it sunny in Bilecik?
Bilecik 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 Bilecik?
The heaviest 24-hour snowfall measured in Bilecik between 1940 and 2025 was 17 December 2003, with 19.9 cm.
Are there tropical nights in Bilecik?
Yes: Bilecik has on average 6 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Bilecik?
In Bilecik, between 1940 and 2025, the highest apparent temperature reached 42.6 °C on 29 July 2000, and the lowest was -28.8 °C on 31 December 1941.
Compare Bilecik with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bilecik