Humidity Levels in Illinois During January

The average humidity in January is listed below for places in Illinois. The tables give daily averages along with highest and lowest relative humidity levels.

Relative humidity measures the actual amount of moisture in the air as a percentage of the maximum amount of moisture the air can hold.

All the numbers here are averages for the years 1961 to 1990.

Average Humidity

In this table, the Daily number is the average of humidity readings taken every three hours throughout the day. Morning percentages are for 6 am and Afternoon measures are for 3 pm local standard time.

Average relative humidity (%) in January
Daily Place Morning Afternoon
72 Chicago 76 65
70 Moline 74 63
74 Peoria 79 65
75 Rockford 79 68
74 Springfield 78 66

Highest and Lowest Humidity

Below are the averages during January for maximum and minimum humidity levels in Illinois. The hours when this month's highest and lowest humidity readings usually occur are given in local standard time.

Daily high and low relative humidity (%) averages in January
High Time Place Low Time
76.2 6 am Chicago 64.9 3 pm
73.5 6 am Moline 63.3 3 pm
78.6 6 am Peoria 65.3 3 pm
79.2 6 am Rockford 67.5 3 pm
78.4 6 am Springfield 65.5 3 pm

World Data Center for Meteorology. Climate of the World.

Illinois Humidity
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