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Weather in Mississauga for September 2026

Your guide to Mississauga weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Mississauga at the beginning of September is 25 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21 °C by the end of September.

    • Rain 🌧️

  • Mississauga experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 68.8 mm.

    • More

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Average dry days
20
Dry days
Average rainy days
10
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
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Partly cloudy
25°
2
Mist
24°
3
Thundery outbreaks possible
27°
4
Partly cloudy
27°
5
Cloudy
28°
6
Thundery outbreaks possible
25°
7
Light rain shower
19°
8
Overcast
21°
9
Overcast
22°
10
Overcast
23°
11
Patchy rain possible
24°
12
Light rain shower
25°
13
Overcast
23°
14
Partly cloudy
24°
15
Sunny
24°
16
Mist
25°
17
Thundery outbreaks possible
24°
18
Mist
24°
19
Cloudy
22°
20
Cloudy
22°
21
Overcast
23°
22
Mist
23°
23
Mist
22°
24
Sunny
20°
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
 25° /14° 0.1 mm 6
2 Sept. Mist
Mist
 24° /13° 0.3 mm 5
3 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 27° /15° 0.4 mm 7
4 Sept. Partly cloudy
Partly cloudy
 27° /16° 7.8 mm 7
5 Sept. Cloudy
Cloudy
 28° /16° 0 mm 7
6 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 25° /16° 4.1 mm 5
7 Sept. Light rain shower
Light rain shower
 19° /13° 3.8 mm 4
8 Sept. Overcast
Overcast
 21° /11° 0 mm 4
9 Sept. Overcast
Overcast
 22° /12° 0.7 mm 5
10 Sept. Overcast
Overcast
 23° /13° 0 mm 5
11 Sept. Patchy rain possible
Patchy rain possible
 24° /15° 0.1 mm 6
12 Sept. Light rain shower
Light rain shower
 25° /15° 1.6 mm 6
13 Sept. Overcast
Overcast
 23° /14° 0 mm 6
14 Sept. Partly cloudy
Partly cloudy
 24° /13° 0 mm 6
15 Sept. Sunny
Sunny
 24° /14° 0 mm 6
16 Sept. Mist
Mist
 25° /13° 0 mm 6
17 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 24° /14° 1.6 mm 6
18 Sept. Mist
Mist
 24° /14° 0 mm 5
19 Sept. Cloudy
Cloudy
 22° /12° 0 mm 5
20 Sept. Cloudy
Cloudy
 22° /11° 0 mm 5
21 Sept. Overcast
Overcast
 23° /15° 0 mm 5
22 Sept. Mist
Mist
 23° /16° 16.6 mm 5
23 Sept. Mist
Mist
 22° /16° 5.7 mm 5
24 Sept. Sunny
Sunny
 20° /15° 9 mm 5
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 10 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 10 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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Location coordinates Where is Mississauga?

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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