Joliet (IL) Climate by Month
The climate in Joliet is marked by big temperature swings throughout the year.
Temperatures range from warm during the warmest months
to very cold in the cooler months.
It also experiences much rain/snowfall throughout the year.
Let's now guide you through the climate details for a complete overview.
Average day and night temperature
In Joliet, temperatures differ significantly between summer and winter months. Average daytime temperatures reach a comfortable 29°C in July. In January, the coolest month of the year, temperatures drop to a very cold -0°C. At night, expect cooler temperatures, averaging -9°C during this month.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Joliet experiences significant rain/snowfall throughout the year, averaging 1070 mm of precipitation annually. Joliet can be quite wet during June, receiving approximately 133 mm of precipitation over 15 rainy days. In contrast February, experiences much drier conditions, with 51 mm of snow/rainfall, spread across 10 snowy/rainy days.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Joliet can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 10.6 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 3.6 hours of sunlight per day.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is low throughout the year in Joliet.
Relative humidity over the year
The best time of year to visit Joliet in the United States of America
During the months of May and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
The hottest season / summer takes place in June, July, August and September.
The coldest season / winter is in the following months: January, February and December.
July has an average maximum temperature of 29°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of -0°C.
June tops the wettest month list with 133 mm of rainfall.
February is the driest month with 51 mm of precipitation.
July is the sunniest month with an average of 319 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
