Joliet
Illinois, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and Climate
Joliet, IL

  • The average high temperature in January: -0.6°C

The warmest month (with the highest average high temperature) is July (28.9°C).
The month with the lowest average high temperature is January (-0.6°C).

  • The average low temperature in January: -8.9°C

The month with the highest average low temperature is July (17.8°C).
The coldest month (with the lowest average low temperature) is January (-8.9°C).

  • The average rainfall in January: 45.7mm

The wettest month (with the highest rainfall) is July (110mm).
The driest month (with the lowest rainfall) is February (43.9mm).

  • The average rainfall days in January: 10.6 days

The month with the highest number of rainy days is April (11.4 days).
The month with the lowest number of rainy days is September (8.2 days).

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