Oshawa
September
Weather in Oshawa for September 2025
Your guide to Oshawa weather in September - trends and predictions
In general, the average temperature in Oshawa at the beginning of September is 24.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.4 °C by the end of September.
With an average of 5 rainy days, Oshawa experiences minimal rainfall in September.
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25
Dry days
5
Rainy days
0
Snow days
23°/13°
Temperatures
19 km/h
Avg max wind
72 %
Avg humidity
Oshawa in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  22° | 2  22° | 3  26° | 4 27° | 5  28° | 6 25° | 7  20° |
| 8  22° | 9 20° | 10 21° | 11 22° | 12  24° | 13 21° | 14  22° |
| 15 22° | 16 23° | 17 21° | 18 22° | 19 22° | 20 21° | 21 23° |
| 22 21° | 23 20° | 24 21° | 25 23° | 26 22° | 27 19° | 28 19° |
| 29 19° | 30 20° |
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Temperatures trend during September in Oshawa
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Partly cloudy | 22° /13° | 0.3 mm | 6 | |
| 2 Sept. | Mist | 22° /13° | 0.6 mm | 6 | |
| 3 Sept. | Thundery outbreaks possible | 26° /14° | 0 mm | 7 | |
| 4 Sept. | Partly cloudy | 27° /17° | 0 mm | 7 | |
| 5 Sept. | Sunny | 28° /18° | 0 mm | 7 | |
| 6 Sept. | Fog | 25° /18° | 1.4 mm | 6 | |
| 7 Sept. | Light rain shower | 20° /13° | 5.8 mm | 5 | |
| 8 Sept. | Overcast | 22° /11° | 0 mm | 5 | |
| 9 Sept. | Overcast | 20° /12° | 3.8 mm | 5 | |
| 10 Sept. | Overcast | 21° /14° | 0 mm | 6 | |
| 11 Sept. | Overcast | 22° /15° | 0.1 mm | 5 | |
| 12 Sept. | Moderate rain | 24° /15° | 2.5 mm | 6 | |
| 13 Sept. | Overcast | 21° /14° | 0 mm | 5 | |
| 14 Sept. | Cloudy | 22° /13° | 0 mm | 6 | |
| 15 Sept. | Sunny | 22° /12° | 0 mm | 6 | |
| 16 Sept. | Partly cloudy | 23° /13° | 0 mm | 6 | |
| 17 Sept. | Light rain shower | 21° /12° | 0.5 mm | 5 | |
| 18 Sept. | Mist | 22° /12° | 0 mm | 5 | |
| 19 Sept. | Partly cloudy | 22° /9° | 0 mm | 6 | |
| 20 Sept. | Partly cloudy | 21° /10° | 0 mm | 6 | |
| 21 Sept. | Partly cloudy | 23° /15° | 0 mm | 6 | |
| 22 Sept. | Mist | 21° /13° | 2.1 mm | 5 | |
| 23 Sept. | Mist | 20° /14° | 25.5 mm | 5 | |
| 24 Sept. | Sunny | 21° /13° | 0 mm | 5 | |
| 25 Sept. | Overcast | 23° /14° | 25.5 mm | 5 | |
| 26 Sept. | Partly cloudy | 22° /14° | 0 mm | 6 | |
| 27 Sept. | Overcast | 19° /10° | 0 mm | 4 | |
| 28 Sept. | Overcast | 19° /13° | 0.1 mm | 4 | |
| 29 Sept. | Fog | 19° /15° | 0 mm | 4 | |
| 30 Sept. | Overcast | 20° /14° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Oshawa in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Oshawa forecast closer to your planned date for the most up-to-date weather information.
Oshawa in September - FAQ
What are the expected maximum and minimum temperatures in Oshawa during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Oshawa during September?
Expect minimal rainfall in Oshawa during September, with a total of 17.4 mm over approximately 5 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Oshawa during September?
The average wind speed in Oshawa during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Oshawa
Explore the daily rainfall trends and prepare for Oshawas September weather 💧
UV exposure in Oshawa during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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