Average data for 10 years
1 December
Monday
+12°
+9°
2 December
Tuesday
+13°
+9°
3 December
Wednesday
+13°
+9°
4 December
Thursday
+12°
+8°
5 December
Friday
+12°
+8°
6 December
Saturday
+12°
+8°
7 December
Sunday
+11°
+8°
8 December
Monday
+10°
+7°
9 December
Tuesday
+11°
+7°
10 December
Wednesday
+11°
+7°
11 December
Thursday
+10°
+7°
12 December
Friday
+10°
+7°
13 December
Saturday
+10°
+6°
14 December
Sunday
+10°
+6°
15 December
Monday
+10°
+7°
16 December
Tuesday
+10°
+6°
17 December
Wednesday
+10°
+6°
18 December
Thursday
+10°
+6°
19 December
Friday
+9°
+5°
20 December
Saturday
+9°
+5°
21 December
Sunday
+9°
+6°
22 December
Monday
+9°
+5°
23 December
Tuesday
+9°
+6°
24 December
Wednesday
+10°
+6°
25 December
Thursday
+10°
+6°
26 December
Friday
+10°
+6°
27 December
Saturday
+11°
+6°
28 December
Sunday
+10°
+7°
29 December
Monday
+10°
+6°
30 December
Tuesday
+9°
+6°
31 December
Wednesday
+9°
+6°
December in Istanbul is the rainiest and the cloudiest month of the year. In December, the weather in Istanbul is typically warm. Average daily high temperature in December is about 10 degrees above zero. On average, Istanbul has 14 rainy, 7 partly cloudy, 6 sunny, and 4 cloudy days in December. The rains are usually heavy. December as well as January, February, and March is considered the most uncomfortable time to visit Istanbul.