Average data for 10 years
1 January
Monday
+6°
+3°
2 January
Tuesday
+6°
+2°
3 January
Wednesday
+5°
+1°
4 January
Thursday
+5°
+1°
5 January
Friday
+5°
+2°
6 January
Saturday
+5°
+2°
7 January
Sunday
+5°
+2°
8 January
Monday
+5°
+2°
9 January
Tuesday
+4°
+1°
10 January
Wednesday
+4°
+1°
11 January
Thursday
+3°
0°
12 January
Friday
+4°
+1°
13 January
Saturday
+4°
+2°
14 January
Sunday
+5°
+1°
15 January
Monday
+4°
+1°
16 January
Tuesday
+5°
+2°
17 January
Wednesday
+5°
+2°
18 January
Thursday
+6°
+2°
19 January
Friday
+6°
+2°
20 January
Saturday
+5°
+2°
21 January
Sunday
+6°
+2°
22 January
Monday
+5°
+2°
23 January
Tuesday
+5°
+2°
24 January
Wednesday
+5°
+1°
25 January
Thursday
+5°
+2°
26 January
Friday
+6°
+2°
27 January
Saturday
+6°
+2°
28 January
Sunday
+5°
+1°
29 January
Monday
+6°
+2°
30 January
Tuesday
+7°
+3°
31 January
Wednesday
+5°
+2°
January in Tehran is the rainiest and the coldest month of the year. In January, the weather in Tehran is typically cold. Average daily high temperature in January is about 5 degrees above zero. On average, Tehran has 27 sunny, 3 partly cloudy, and 1 rainy day in January. The rains are usually light. January as well as February and December is considered the most uncomfortable time to visit Tehran.