Climate averages 1991–2020
Yalova weather
in December.
A cool, 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 Yalova: daytime highs average 10.6°C and nights cool to about 4.9°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 100 mm of rain on roughly 13 days, which makes December a 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 Gebze (21 km away). In December its highs average 9.5°C, 1.1°C cooler than Yalova, with 86 mm of rain.
Among the 138 cities listed in Turkey, Yalova ranks 52nd of 138 for the warmest December highs and joint 93rd of 138 for the driest December (rainfall, lowest first). The mean December high of those 138 cities is 9.3°C; Yalova is 1.3°C warmer than that mean.
From December to January, average highs fall by 1.7°C to 8.8°C, and monthly rainfall falls from 100 mm to 90 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
Yalova climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.8°C2.8°C | 2.8°C | 90 | 12.8 | 9.610 h |
| February | 9.9°C2.9°C | 2.9°C | 73 | 11.8 | 10.611 h |
| March | 12.6°C4.7°C | 4.7°C | 76 | 10.8 | 11.912 h |
| April | 17.0°C8.2°C | 8.2°C | 52 | 8.5 | 13.313 h |
| May | 21.8°C13.0°C | 13.0°C | 39 | 6.6 | 14.414 h |
| June | 26.3°C17.5°C | 17.5°C | 38 | 6.1 | 15.015 h |
| July | 29.0°C19.9°C | 19.9°C | 24 | 3.8 | 14.815 h |
| August | 29.3°C20.5°C | 20.5°C | 26 | 3.3 | 13.814 h |
| September | 25.4°C17.6°C | 17.6°C | 48 | 6.4 | 12.513 h |
| October | 20.4°C13.9°C | 13.9°C | 73 | 9.0 | 11.211 h |
| November | 15.2°C8.8°C | 8.8°C | 74 | 9.9 | 10.010 h |
| December, selected | 10.6°C4.9°C | 4.9°C | 100 | 12.7 | 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
- Gebze in DecemberTurkey · 21 kmHigh 9.5°C · Low 4.2°C · 86 mm rain
- Gemlik in DecemberTurkey · 27 kmHigh 11.2°C · Low 5.2°C · 97 mm rain
- Sultanbeyli in DecemberTurkey · 34 kmHigh 9.7°C · Low 5.3°C · 100 mm rain
- Sancaktepe in DecemberTurkey · 39 kmHigh 9.8°C · Low 5.8°C · 100 mm rain
- Ümraniye in DecemberTurkey · 42 kmHigh 9.6°C · Low 5.7°C · 99 mm rain
- Üsküdar in DecemberTurkey · 47 kmHigh 10.1°C · Low 6.1°C · 99 mm rain
- Derince in DecemberTurkey · 47 kmHigh 10.5°C · Low 3.7°C · 103 mm rain
- Istanbul in DecemberTurkey · 48 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 Yalova) is explained once on the Yalova year overview and on the Sources, method and limits page.