The temperatures in Guelph in August are comfortable with low of 15°C and and high up to 24°C.
You can expect about 3 to 8 days of rain in Guelph during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Guelph in August 2025.
If you’re planning to visit Guelph in the near future, we highly recommend that you review the 14 day weather forecast for Guelph before you arrive.
Temperatures
24° / 15°
Rainy Days
7
Snowy Days
0
Dry Days
24
Rainfall
133
mm
Sun Hours
10.8
Hrs
