Mississauga
September
Weather in Mississauga for September 2025
Your guide to Mississauga weather in September - trends and predictions
In general, the average temperature in Mississauga at the beginning of September is 26.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.6 °C by the end of September.
Mississauga sees moderate rainfall in September, averaging 7 rainy days.
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23
Dry days
7
Rainy days
0
Snow days
24°/14°
Temperatures
16 km/h
Avg max wind
67 %
Avg humidity
Mississauga in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  24° | 2  23° | 3  28° | 4 29° | 5  30° | 6 28° | 7  21° |
| 8  22° | 9 22° | 10 22° | 11 24° | 12 25° | 13 22° | 14 22° |
| 15  25° | 16 25° | 17 23° | 18 23° | 19 23° | 20 23° | 21 23° |
| 22 22° | 23 20° | 24 21° | 25 23° | 26 24° | 27 19° | 28 18° |
| 29 19° | 30 20° |
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Temperatures trend during September in Mississauga
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 | 24° /14° | 0.1 mm | 6 | |
| 2 Sept. | Mist | 23° /12° | 0.5 mm | 6 | |
| 3 Sept. | Thundery outbreaks possible | 28° /15° | 0.6 mm | 7 | |
| 4 Sept. | Partly cloudy | 29° /17° | 0 mm | 8 | |
| 5 Sept. | Cloudy | 30° /18° | 0 mm | 8 | |
| 6 Sept. | Thundery outbreaks possible | 28° /19° | 6.2 mm | 6 | |
| 7 Sept. | Light rain shower | 21° /14° | 5.7 mm | 5 | |
| 8 Sept. | Overcast | 22° /11° | 0 mm | 5 | |
| 9 Sept. | Overcast | 22° /12° | 1.1 mm | 5 | |
| 10 Sept. | Overcast | 22° /14° | 0 mm | 6 | |
| 11 Sept. | Patchy rain possible | 24° /15° | 0.1 mm | 6 | |
| 12 Sept. | Light rain shower | 25° /15° | 2.5 mm | 6 | |
| 13 Sept. | Overcast | 22° /13° | 0 mm | 6 | |
| 14 Sept. | Partly cloudy | 22° /13° | 0 mm | 6 | |
| 15 Sept. | Sunny | 25° /13° | 0 mm | 7 | |
| 16 Sept. | Mist | 25° /13° | 0 mm | 6 | |
| 17 Sept. | Thundery outbreaks possible | 23° /15° | 2.4 mm | 5 | |
| 18 Sept. | Mist | 23° /14° | 0 mm | 5 | |
| 19 Sept. | Cloudy | 23° /12° | 0 mm | 5 | |
| 20 Sept. | Cloudy | 23° /12° | 0 mm | 5 | |
| 21 Sept. | Overcast | 23° /16° | 0 mm | 5 | |
| 22 Sept. | Mist | 22° /16° | 0 mm | 5 | |
| 23 Sept. | Mist | 20° /16° | 7 mm | 5 | |
| 24 Sept. | Sunny | 21° /15° | 0 mm | 5 | |
| 25 Sept. | Overcast | 23° /16° | 16.4 mm | 5 | |
| 26 Sept. | Partly cloudy | 24° /15° | 0.8 mm | 6 | |
| 27 Sept. | Cloudy | 19° /12° | 0 mm | 5 | |
| 28 Sept. | Patchy rain possible | 18° /14° | 0 mm | 4 | |
| 29 Sept. | Overcast | 19° /16° | 1.6 mm | 5 | |
| 30 Sept. | Mist | 20° /14° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Mississauga 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 Mississauga forecast closer to your planned date for the most up-to-date weather information.
Mississauga in September - FAQ
What are the expected maximum and minimum temperatures in Mississauga during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Mississauga during September?
In September, Mississauga can expect light to moderate rainfall, totaling 23.4 mm across approximately 7 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Mississauga during September?
The average wind speed in Mississauga during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Mississauga
Explore the daily rainfall trends and prepare for Mississaugas September weather 💧
UV exposure in Mississauga during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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