Gemlik climate — normals and trends
Gemlik (Republic of Türkiye) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 14.0 °C and it receives 793 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 (23.5 °C on average) and the coldest is January (4.7 °C). Rainfall peaks in December.
Gemlik averages 21 frost days, 22 hot days (≥ 30 °C) and 114 rainy days per year.
Gemlik has warmed by +2.3 °C between 1940 and 2025, or +0.27 °C per decade. This trend is statistically significant.
The number of frost days there went from about 34 to 8 per year over the period.
The hottest day of the period reached 40.7 °C (on 13 July 2000) and the coldest -14.8 °C (on 5 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
GemlikBursa Province
- coords
- 40.43°, 29.16°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.0°C
Average daily high
18.0°C
Average daily low
10.4°C
Annual rainfall
793mm
Sunshine / day
9.2h
Mean relative humidity
76%
Average peak wind
11.6km/h
Seasonal range
18.8°C
Frost days (< 0 °C)
21 d/yr
Hot days (≥ 30 °C)
22 d/yr
Rainy days (≥ 1 mm)
114 d/yr
Annual snowfall
57.2 cm
Average feels-like high
17.7 °C
Average feels-like low
9.2 °C
Average peak gust
32.4 km/h
Tropical nights (≥ 20 °C)
24 d/yr
Solar radiation
14.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.3 °C
since 1940
+0.3 °C per decade · r² = 0.58 · 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
40.7 °C
13 July 2000
Coldest day
-14.8 °C
5 January 1942
Wettest day
77 mm
4 July 1959
Windiest day
31.5 km/h
9 October 2003
Strongest gust
101.5 km/h
22 November 2008
Hottest feels-like
43.8 °C
13 July 2000
Coldest feels-like
-20.1 °C
5 January 1942
Snowiest day
27.3 cm
29 December 2016
Sunniest day
14.1 h
24 June 2025
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 12.0 °C | +4.3 °C | 63 mm | -32 mm |
| Feb | 7.2 °C | -1.7 °C | 75 mm | -10 mm |
| Mar | 17.1 °C | +5.5 °C | 51 mm | -32 mm |
| Apr | 15.4 °C | -1.0 °C | 62 mm | -5 mm |
| May | 22.1 °C | +1.1 °C | 57 mm | +3 mm |
| Jun | 28.4 °C | +2.9 °C | 2 mm | -46 mm |
| Jul | 32.6 °C | +4.6 °C | 1 mm | -30 mm |
| Aug | 30.8 °C | +2.5 °C | 9 mm | -20 mm |
| Sep | 26.4 °C | +1.7 °C | 39 mm | -9 mm |
| Oct | 19.8 °C | +0.2 °C | 145 mm | +76 mm |
| Nov | 18.7 °C | +3.9 °C | 41 mm | -40 mm |
| Dec | 11.1 °C | +1.2 °C | 102 mm | -2 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 Gemlik?
Gemlik has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 14.0 °C and it receives 793 mm of precipitation per year.
What is the hottest day ever recorded in Gemlik?
The hottest day measured in Gemlik between 1940 and 2025 was 13 July 2000, reaching 40.7 °C.
What is the coldest day in Gemlik?
The coldest day measured in Gemlik between 1940 and 2025 was 5 January 1942, at -14.8 °C.
Does it snow in Gemlik?
Yes. Gemlik gets on average 57.2 cm of snow per year and has around 21 frost days.
Has the climate of Gemlik warmed?
Yes: Gemlik warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Gemlik?
The wettest day measured in Gemlik between 1940 and 2025 was 4 July 1959, with 77 mm of rain in 24 hours.
What was the windiest day in Gemlik?
The windiest day measured in Gemlik between 1940 and 2025 was 9 October 2003, with winds reaching 31.5 km/h.
What is the warmest month in Gemlik?
The warmest month in Gemlik is August (23.5 °C on average); the coldest is January (4.7 °C).
How much does it rain in Gemlik?
Gemlik receives on average 793 mm of precipitation per year, spread over about 114 rainy days.
Is it sunny in Gemlik?
Gemlik 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 Gemlik?
The heaviest 24-hour snowfall measured in Gemlik between 1940 and 2025 was 29 December 2016, with 27.3 cm.
Are there tropical nights in Gemlik?
Yes: Gemlik has on average 24 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Gemlik?
In Gemlik, between 1940 and 2025, the highest apparent temperature reached 43.8 °C on 13 July 2000, and the lowest was -20.1 °C on 5 January 1942.
Compare Gemlik with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Gemlik