Average data for 10 years
1 September
Sunday
+22°
+18°
2 September
Monday
+22°
+18°
3 September
Tuesday
+22°
+17°
4 September
Wednesday
+21°
+16°
5 September
Thursday
+21°
+18°
6 September
Friday
+22°
+17°
7 September
Saturday
+21°
+17°
8 September
Sunday
+23°
+18°
9 September
Monday
+23°
+18°
10 September
Tuesday
+23°
+18°
11 September
Wednesday
+22°
+18°
12 September
Thursday
+21°
+16°
13 September
Friday
+19°
+15°
14 September
Saturday
+20°
+15°
15 September
Sunday
+20°
+15°
16 September
Monday
+19°
+15°
17 September
Tuesday
+20°
+15°
18 September
Wednesday
+20°
+16°
19 September
Thursday
+20°
+15°
20 September
Friday
+18°
+13°
21 September
Saturday
+18°
+13°
22 September
Sunday
+19°
+14°
23 September
Monday
+20°
+14°
24 September
Tuesday
+19°
+14°
25 September
Wednesday
+20°
+15°
26 September
Thursday
+21°
+16°
27 September
Friday
+20°
+16°
28 September
Saturday
+20°
+16°
29 September
Sunday
+18°
+14°
30 September
Monday
+18°
+12°
Cities with similar weather in September
Bulgaria
Burgas
Montenegro
Tivat
Bulgaria
The Sunny Beach
Serbia
Belgrade
In September, the weather in Washington is typically warm. Average daily high temperature in September is about 20 degrees above zero. On average, Washington has 30 sunny days in September. September as well as July and August is considered the most comfortable time to visit Washington.