Climate averages 1991–2020
Gemlik weather
in September.
A warm, moderately wet month: the 4th warmest and the 5th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Gemlik: daytime highs average 26.1°C and nights cool to about 18.3°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 54 mm of rain on roughly 7 days, which makes September a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 30 min on an average September day.
The nearest other city in this atlas is Yalova (27 km away). In September its highs average 25.4°C, 0.8°C cooler than Gemlik, with 48 mm of rain.
Among the 138 cities listed in Turkey, Gemlik ranks joint 70th of 138 for the warmest September highs and 121st of 138 for the driest September (rainfall, lowest first). The mean September high of those 138 cities is 27.1°C; Gemlik is 0.9°C cooler than that mean.
From September to October, average highs fall by 5.0°C to 21.2°C, and monthly rainfall rises from 54 mm to 77 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Gemlik climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.5°C3.2°C | 3.2°C | 90 | 12.7 | 9.610 h |
| February | 10.7°C3.2°C | 3.2°C | 80 | 12.0 | 10.611 h |
| March | 13.7°C5.2°C | 5.2°C | 86 | 12.1 | 11.912 h |
| April | 18.1°C8.9°C | 8.9°C | 65 | 10.2 | 13.313 h |
| May | 22.8°C14.0°C | 14.0°C | 53 | 8.1 | 14.414 h |
| June | 26.8°C18.5°C | 18.5°C | 48 | 7.9 | 15.015 h |
| July | 29.6°C20.7°C | 20.7°C | 26 | 4.5 | 14.815 h |
| August | 30.1°C21.1°C | 21.1°C | 28 | 4.2 | 13.814 h |
| September, selected | 26.1°C18.3°C | 18.3°C | 54 | 6.9 | 12.513 h |
| October | 21.2°C14.5°C | 14.5°C | 77 | 9.1 | 11.211 h |
| November | 16.0°C9.3°C | 9.3°C | 74 | 9.8 | 10.010 h |
| December | 11.2°C5.2°C | 5.2°C | 97 | 12.5 | 9.39 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Yalova in SeptemberTurkey · 27 kmHigh 25.4°C · Low 17.6°C · 48 mm rain
- Bursa in SeptemberTurkey · 27 kmHigh 25.9°C · Low 16.8°C · 56 mm rain
- Nilüfer in SeptemberTurkey · 32 kmHigh 26.2°C · Low 16.9°C · 56 mm rain
- Gebze in SeptemberTurkey · 47 kmHigh 23.7°C · Low 16.6°C · 45 mm rain
- İnegol in SeptemberTurkey · 49 kmHigh 25.2°C · Low 14.7°C · 55 mm rain
- Sultanbeyli in SeptemberTurkey · 60 kmHigh 23.7°C · Low 17.5°C · 48 mm rain
- Sancaktepe in SeptemberTurkey · 64 kmHigh 23.7°C · Low 18.0°C · 48 mm rain
- Ümraniye in SeptemberTurkey · 65 kmHigh 23.5°C · Low 17.9°C · 46 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Gemlik) is explained once on the Gemlik year overview and on the Sources, method and limits page.