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Canada weather

Weather in Mississauga for September 2026

Your guide to Mississauga weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Mississauga has been nearly identical to the historical average, with a temperature of 25.2 °C (showing only a slight deviation of 0.4 °C).

  • Expect cooler weather in the next days in Mississauga with the forecast suggesting a temperature of 21.9 °C, lower than the historical average.

  • In general, the average temperature in Mississauga at the beginning of September is 25.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.6 °C by the end of September.

    • Rain 🌧️

  • Mississauga experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 68.8 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
24
Dry days
Average rainy days
6
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/14°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
70 %
Avg humidity

Mississauga Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Partly cloudy
27°
2
Mist
25°
3
Thundery outbreaks possible
28°
4
Partly cloudy
27°
5
Sunny
27°
6
Thundery outbreaks possible
24°
7
Light rain shower
20°
8
Overcast
22°
9
Overcast
23°
10
Overcast
24°
11
Sunny
25°
12
Overcast
26°
13
Partly cloudy
26°
14
Overcast
20°
15
Overcast
22°
16
Overcast
24°
17
Patchy rain possible
17°
18
Sunny
18°
19
Sunny
21°
20
Sunny
22°
21
Sunny
22°
22
Overcast
20°
23
Overcast
20°
24
Sunny
24°
25
Overcast
23°
26
Mist
23°
27
Fog
20°
28
Patchy rain possible
19°
29
Overcast
21°
30
Mist
21°

Temperatures trend during September in Mississauga

See the weather trend as well as the moving average line

September weather in Mississauga day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
 27° /15° 1.7 mm 6
2 Sept. Mist
Mist
 25° /14° 14.2 mm 4
3 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 28° /15° 0.3 mm 6
4 Sept. Partly cloudy
Partly cloudy
 27° /16° 5.8 mm 6
5 Sept. Sunny
Sunny
 27° /15° 0 mm 7
6 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 24° /16° 3.1 mm 6
7 Sept. Light rain shower
Light rain shower
 20° /13° 2.8 mm 5
8 Sept. Overcast
Overcast
 22° /11° 0 mm 4
9 Sept. Overcast
Overcast
 23° /13° 3.5 mm 4
10 Sept. Overcast
Overcast
 24° /13° 0.4 mm 5
11 Sept. Sunny
Sunny
 25° /12° 0 mm 6.1
12 Sept. Overcast
Overcast
 26° /15° 0 mm 6
13 Sept. Partly cloudy
Partly cloudy
 26° /17° 1.4 mm 5.7
14 Sept. Overcast
Overcast
 20° /11° 0 mm 5.6
15 Sept. Overcast
Overcast
 22° /15° 1.2 mm 5
16 Sept. Overcast
Overcast
 24° /16° 6.2 mm 5
17 Sept. Patchy rain possible
Patchy rain possible
 17° /14° 0.1 mm 4
18 Sept. Sunny
Sunny
 18° /12° 0 mm 5
19 Sept. Sunny
Sunny
 21° /11° 0 mm 6
20 Sept. Sunny
Sunny
 22° /14° 0 mm 6
21 Sept. Sunny
Sunny
 22° /15° 0 mm 6
22 Sept. Overcast
Overcast
 20° /14° 0.2 mm 4
23 Sept. Overcast
Overcast
 20° /13° 0.2 mm 5
24 Sept. Sunny
Sunny
 24° /15° 0 mm 6
25 Sept. Overcast
Overcast
 23° /16° 15.4 mm 5
26 Sept. Mist
Mist
 23° /14° 0.5 mm 6
27 Sept. Fog
Fog
 20° /13° 0 mm 5
28 Sept. Patchy rain possible
Patchy rain possible
 19° /14° 0 mm 4
29 Sept. Overcast
Overcast
 21° /14° 1.1 mm 5
30 Sept. Mist
Mist
 21° /14° 0 mm 5
Next
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.
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Mississauga in September - FAQ

What are the expected maximum and minimum temperatures in Mississauga during September?
Enjoy moderate daytime temperatures of up to 23° 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?
Moderate rainfall is anticipated in Mississauga during September, with a total of 68.8 mm spread over approximately 6 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Mississauga during September?
The average wind speed in Mississauga during September is 15 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 💧
Typically, Mississauga has 6 rainy days in September with a total of 68.8 mm of rainfall.

UV exposure in Mississauga during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Get accurate weather forecasts for Mississauga, located at latitude 43.579 and longitude -79.658. Stay updated with localized weather information tailored for Mississauga.

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