Average data for 10 years
1 September
Sunday
+18°
+15°
2 September
Monday
+18°
+15°
3 September
Tuesday
+18°
+15°
4 September
Wednesday
+17°
+15°
5 September
Thursday
+17°
+15°
6 September
Friday
+18°
+16°
7 September
Saturday
+18°
+16°
8 September
Sunday
+18°
+15°
9 September
Monday
+18°
+16°
10 September
Tuesday
+20°
+16°
11 September
Wednesday
+18°
+15°
12 September
Thursday
+17°
+14°
13 September
Friday
+17°
+15°
14 September
Saturday
+18°
+15°
15 September
Sunday
+17°
+15°
16 September
Monday
+17°
+14°
17 September
Tuesday
+17°
+14°
18 September
Wednesday
+17°
+14°
19 September
Thursday
+16°
+13°
20 September
Friday
+16°
+14°
21 September
Saturday
+17°
+14°
22 September
Sunday
+17°
+14°
23 September
Monday
+16°
+14°
24 September
Tuesday
+16°
+14°
25 September
Wednesday
+15°
+13°
26 September
Thursday
+15°
+14°
27 September
Friday
+16°
+13°
28 September
Saturday
+15°
+13°
29 September
Sunday
+14°
+12°
30 September
Monday
+14°
+12°
Cities near you
Canada
Vancouver
United States
Seattle
United States
Portland
Canada
Victoria
United States
Salem
Cities with similar weather in September
Australia
Sydney
Denmark
Copenhagen
Kazakhstan
Balkhash
Canada
Montreal
Belgium
Bruges
In September, the weather in Mount Vernon is typically warm. Average daily high temperature in September is about 17 degrees above zero. On average, Mount Vernon has 14 sunny, 10 rainy, 5 partly cloudy, and 1 cloudy day in September. The rains are usually moderate.