Weather in Istanbul for December 2025
In general, the average temperature in Istanbul at the beginning of December is 13.9 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 12.9 °C by the end of December.
Istanbul experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 69.6 mm.
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Istanbul Weather December
Temperatures trend during December in Istanbul
December weather in Istanbul day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Partly cloudy | 14° /10° | 1.9 mm | 4 | |
| 2 Dec. |  Sunny | 14° /11° | 2.5 mm | 4 | |
| 3 Dec. |  Overcast | 15° /12° | 0.3 mm | 4 | |
| 4 Dec. |  Patchy rain possible | 13° /9° | 3 mm | 3 | |
| 5 Dec. | Patchy rain possible | 13° /9° | 0.3 mm | 3 | |
| 6 Dec. | Partly cloudy | 14° /10° | 1.8 mm | 4 | |
| 7 Dec. |  Moderate rain at times | 14° /10° | 1.7 mm | 4 | |
| 8 Dec. | Patchy rain possible | 12° /9° | 4.2 mm | 3 | |
| 9 Dec. |  Cloudy | 14° /10° | 5.7 mm | 3 | |
| 10 Dec. | Overcast | 15° /11° | 2.2 mm | 4 | |
| 11 Dec. | Moderate rain at times | 14° /11° | 3.2 mm | 3 | |
| 12 Dec. | Patchy rain possible | 13° /10° | 2.1 mm | 3 | |
| 13 Dec. | Moderate rain at times | 13° /9° | 4.8 mm | 3 | |
| 14 Dec. | Patchy rain possible | 12° /9° | 0.8 mm | 3 | |
| 15 Dec. | Moderate rain at times | 12° /8° | 9 mm | 3 | |
| 16 Dec. | Overcast | 10° /7° | 4.9 mm | 3 | |
| 17 Dec. | Overcast | 11° /7° | 2.6 mm | 3 | |
| 18 Dec. | Sunny | 11° /6° | 2 mm | 3 | |
| 19 Dec. | Sunny | 10° /7° | 1.4 mm | 3 | |
| 20 Dec. | Sunny | 11° /7° | 0.6 mm | 3 | |
| 21 Dec. | Patchy rain possible | 11° /7° | 3 mm | 3 | |
| 22 Dec. | Patchy rain possible | 10° /5° | 4.2 mm | 3 | |
| 23 Dec. | Patchy rain possible | 10° /6° | 0.6 mm | 3 | |
| 24 Dec. | Partly cloudy | 11° /7° | 1.1 mm | 3 | |
| 25 Dec. | Sunny | 14° /9° | 0.6 mm | 4 | |
| 26 Dec. | Partly cloudy | 13° /9° | 2.2 mm | 4 | |
| 27 Dec. | Partly cloudy | 13° /9° | 1 mm | 4 | |
| 28 Dec. | Overcast | 12° /9° | 0.5 mm | 3 | |
| 29 Dec. | Sunny | 12° /9° | 1.1 mm | 3 | |
| 30 Dec. | Sunny | 13° /9° | 0.5 mm | 3 | |
| 31 Dec. | Sunny | 13° /9° | 0 mm | 4 | |
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Istanbul weather in December vs November vs January
| November | December | January | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 16°/12° | 12°/9° | 10°/6° |
| Rainfall | 69 mm | 70 mm | 86 mm |
| Snowfall | 0 cm | 0 cm | 1 cm |
| Wind | 23.9 km/h | 22.2 km/h | 22.5 km/h |
| Humidity | 67% | 72% | 71% |
| Rainy days | 18 days | 22 days | 20 days |
| Snow days | 0 days | 0 days | 3 days |
| Dry days | 12 days | 9 days | 8 days |
Planning a trip to Istanbul? Discover the best time to visit
Istanbul in December - FAQ
What to pack to Istanbul in December?
As you prepare for your trip to Istanbul in December, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Istanbul, during December, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
December rainfall patterns in Istanbul
Quick links
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