Climate averages 1991–2020
Gebze weather
in December.
A cool, moderately wet month: the 10th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cool month in Gebze: daytime highs average 9.5°C and nights cool to about 4.2°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 86 mm of rain on roughly 12 days, which makes December a moderately wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 9 h 19 min on an average December day.
The nearest other city in this atlas is Yalova (21 km away). In December its highs average 10.6°C, 1.1°C warmer than Gebze, with 100 mm of rain.
Among the 138 cities listed in Turkey, Gebze ranks joint 73rd of 138 for the warmest December highs and joint 67th of 138 for the driest December (rainfall, lowest first). The mean December high of those 138 cities is 9.3°C; Gebze is 0.2°C warmer than that mean.
From December to January, average highs fall by 1.8°C to 7.8°C, and monthly rainfall falls from 86 mm to 80 mm.
The annual picture
December 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
Gebze climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.8°C2.1°C | 2.1°C | 80 | 11.9 | 9.610 h |
| February | 8.8°C2.2°C | 2.2°C | 67 | 10.9 | 10.611 h |
| March | 11.3°C3.8°C | 3.8°C | 75 | 11.2 | 11.912 h |
| April | 15.7°C7.2°C | 7.2°C | 54 | 9.1 | 13.313 h |
| May | 20.5°C12.0°C | 12.0°C | 44 | 7.5 | 14.414 h |
| June | 24.7°C16.5°C | 16.5°C | 47 | 7.0 | 15.015 h |
| July | 27.2°C19.1°C | 19.1°C | 28 | 4.2 | 14.815 h |
| August | 27.4°C19.7°C | 19.7°C | 27 | 3.9 | 13.814 h |
| September | 23.7°C16.6°C | 16.6°C | 45 | 6.6 | 12.513 h |
| October | 19.0°C12.7°C | 12.7°C | 62 | 8.6 | 11.211 h |
| November | 14.1°C8.0°C | 8.0°C | 62 | 8.9 | 10.010 h |
| December, selected | 9.5°C4.2°C | 4.2°C | 86 | 11.7 | 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
December in nearby cities
- Yalova in DecemberTurkey · 21 kmHigh 10.6°C · Low 4.9°C · 100 mm rain
- Sultanbeyli in DecemberTurkey · 22 kmHigh 9.7°C · Low 5.3°C · 100 mm rain
- Sancaktepe in DecemberTurkey · 28 kmHigh 9.8°C · Low 5.8°C · 100 mm rain
- Derince in DecemberTurkey · 33 kmHigh 10.5°C · Low 3.7°C · 103 mm rain
- Ümraniye in DecemberTurkey · 35 kmHigh 9.6°C · Low 5.7°C · 99 mm rain
- İzmit in DecemberTurkey · 42 kmHigh 10.5°C · Low 3.4°C · 110 mm rain
- Üsküdar in DecemberTurkey · 43 kmHigh 10.1°C · Low 6.1°C · 99 mm rain
- Istanbul in DecemberTurkey · 47 kmHigh 10.1°C · Low 6.4°C · 99 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 Gebze) is explained once on the Gebze year overview and on the Sources, method and limits page.