The temperatures in Mississauga in August are comfortable with low of 18°C and and high up to 26°C.
You can expect rain for roughly half of the month of August in Mississauga. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Mississauga in August 2025.
If you’re planning to visit Mississauga in the near future, we highly recommend that you review the 14 day weather forecast for Mississauga before you arrive.
Temperatures
26° / 18°
Rainy Days
8
Snowy Days
0
Dry Days
23
Rainfall
163
mm
Sun Hours
11.0
Hrs
