Average data for 10 years
1 September
Monday
+29°
+20°
2 September
Tuesday
+29°
+19°
3 September
Wednesday
+29°
+19°
4 September
Thursday
+29°
+19°
5 September
Friday
+29°
+19°
6 September
Saturday
+28°
+18°
7 September
Sunday
+28°
+19°
8 September
Monday
+27°
+18°
9 September
Tuesday
+26°
+17°
10 September
Wednesday
+27°
+17°
11 September
Thursday
+27°
+17°
12 September
Friday
+27°
+17°
13 September
Saturday
+27°
+17°
14 September
Sunday
+27°
+17°
15 September
Monday
+26°
+16°
16 September
Tuesday
+26°
+17°
17 September
Wednesday
+26°
+16°
18 September
Thursday
+27°
+17°
19 September
Friday
+27°
+17°
20 September
Saturday
+27°
+17°
21 September
Sunday
+26°
+17°
22 September
Monday
+25°
+16°
23 September
Tuesday
+25°
+15°
24 September
Wednesday
+25°
+15°
25 September
Thursday
+25°
+16°
26 September
Friday
+25°
+15°
27 September
Saturday
+25°
+15°
28 September
Sunday
+24°
+14°
29 September
Monday
+24°
+13°
30 September
Tuesday
+24°
+13°
Cities with similar weather in September
Italy
Rome
Azerbaijan
Baku
Montenegro
Budva
Spain
Madrid
Italy
Venice
September in Washington is the sunniest month of the year. In September, the weather in Washington is typically warm. Average daily high temperature in September is about 27 degrees above zero. On average, Washington has 16 sunny, 7 rainy, 6 partly cloudy, and 1 cloudy day in September. The rains are usually heavy. September as well as October is considered the most comfortable time to visit Washington.