Oshawa Weather: September
 |
Average Day Temperature: | 71.2°F |
|
Average Night Temperature: | 60.1°F |
|
Sea Water Temperature: | 69.3°F |
|
Number of Sunny Days: | 15 days |
| Sunshine Hours: | 11.8 - 13.2 hours | |
|
Number of Rainy Days: | 2 days |
| Precipitation Totals: | 0.7 in | |
| detailed information | ||
forecast
| Oshawa |
Temperature
| Oshawa |
Air Temperature in September, °F
The highest day temperature in September 2025 was 79°F. The lowest night temperature was 45°F. The average values for day and night temperatures during September were 73.2°F и 57.5°F respectivly.
Oshawa Water Sea Temperature in September, °F
The average sea surface temperature in September 2025 for Oshawa was 66.8°F. The maximum and minimum values were 58.4°F and 70.0°F respectively.
Most of the days in September are sunny but you can also expect cloudy and gloomy days.
Precipitation Totals in September, in
Precipitation total in September for Oshawa is 0.7 in. It makes september one of the least rainy months of the year.
The average wind speed in September is 8.4 mph. It makes September one of the most windless months of the year for Oshawa.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Oshawa in September is 8.1 hours.
Oshawa on the Weather Map
| Halifax |  |
+12 |
| Kingston |  |
+4 |
| Moncton | |
-6 |
| Montreal | |
-2 |
| Niagara Falls | |
+10 |
| Ottawa | |
-4 |
| Prince Edward Island |  |
+6 |
| Quebec | |
-12 |
| Rocky Harbour |  |
+28 |
| St. John's | |
+32 |
| Sydney | |
+24 |
| Toronto | |
+10 |
| Vancouver | |
+42 |
| Victoria | |
+44 |
| Winnipeg | |
+12 |
| 0300 |  |
4°F | N 4 mph |
| 0600 |  |
8°F | N 5 mph |
| 0900 | |
18°F | N 12 mph |
| 1200 | |
24°F | NE 14 mph |
| 1500 | |
28°F | NE 13 mph |
| 1800 | |
28°F | NE 9 mph |
| 2100 | |
30°F | NE 11 mph |
| 0000 | |
30°F | NE 14 mph |