Sarnia September Weather
Averages and records for weather in
Sarnia, Ontario in the month of September.
Typical Sarnia September Weather
1991–2020
|
| Average daily high |
22.2 °C |
| Average daily low |
11.4 °C |
| Average monthly precipitation |
8.1 cm |
| Average monthly snow |
none |
| Daily chance of precipitation |
36.0% |
| Daily chance of snow |
0% |
Note: Daily averages are a moving average which includes 14 days before and after
| Day |
Average (°C) |
Record (°C) |
| High |
Low |
High |
Low |
| September 1 |
24.5 |
13.9 |
36.7 |
6.8 |
| September 2 |
24.4 |
13.8 |
35.0 |
4.4 |
| September 3 |
24.3 |
13.7 |
37.2 |
5.7 |
| September 4 |
24.2 |
13.5 |
32.8 |
5.9 |
| September 5 |
24.1 |
13.4 |
32.4 |
4.4 |
| September 6 |
24.0 |
13.3 |
34.0 |
4.4 |
| September 7 |
23.9 |
13.2 |
33.1 |
4.7 |
| September 8 |
23.7 |
13.0 |
34.1 |
2.2 |
| September 9 |
23.6 |
12.8 |
34.3 |
3.6 |
| September 10 |
23.4 |
12.5 |
35.8 |
4.6 |
| September 11 |
23.2 |
12.3 |
32.6 |
2.9 |
| September 12 |
23.0 |
12.1 |
33.3 |
4.1 |
| September 13 |
22.8 |
11.9 |
32.8 |
3.9 |
| September 14 |
22.6 |
11.7 |
31.2 |
3.3 |
| September 15 |
22.4 |
11.5 |
33.3 |
1.1 |
| September 16 |
22.2 |
11.4 |
30.7 |
3.3 |
| September 17 |
22.0 |
11.2 |
32.8 |
2.8 |
| September 18 |
21.7 |
11.0 |
33.9 |
2.2 |
| September 19 |
21.5 |
10.9 |
33.9 |
1.5 |
| September 20 |
21.3 |
10.8 |
31.5 |
2.2 |
| September 21 |
21.0 |
10.6 |
31.1 |
0.0 |
| September 22 |
20.8 |
10.3 |
31.1 |
2.7 |
| September 23 |
20.7 |
10.1 |
31.7 |
-1.1 |
| September 24 |
20.6 |
10.0 |
32.3 |
2.2 |
| September 25 |
20.4 |
9.8 |
30.4 |
0.6 |
| September 26 |
20.2 |
9.6 |
32.3 |
1.7 |
| September 27 |
20.0 |
9.5 |
29.9 |
1.1 |
| September 28 |
19.8 |
9.2 |
29.4 |
-1.6 |
| September 29 |
19.6 |
9.0 |
27.7 |
-0.6 |
| September 30 |
19.4 |
8.8 |
27.4 |
0.6 |