Illinois, USA
Long term weather forecast
Long term weather forecast

January weather forecast and Climate
Joliet, IL

  • Average high temperature in January: 31°F

Warmest month (with highest average high temperature) is July (84°F).
Month with lowest average high temperature is January (31°F).

  • Average low temperature in January: 16°F

Month with highest average low temperature is July (64°F).
Coldest month (with lowest average low temperature) is January (16°F).

  • Average rainfall in January: 1.8"

Wettest month (with highest rainfall) is July (4.3").
Driest month (with lowest rainfall) is February (1.7").

  • Average rainfall days in January: 10.6 days

Month with highest number of rainy days is April (11.4 days).
Month with lowest number of rainy days is September (8.2 days).