The temperatures in Joliet in August are comfortable with low of 18°C and and high up to 27°C.
You can expect rain for roughly half of the month of August in Joliet. 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 Joliet in August 2025.
If you’re planning to visit Joliet in the near future, we highly recommend that you review the 14 day weather forecast for Joliet before you arrive.
Temperatures
27° / 18°
Rainy Days
8
Snowy Days
0
Dry Days
23
Rainfall
154
mm
Sun Hours
10.7
Hrs
