Humidity Levels in Illinois During April

The average humidity in April 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 April
Daily Place Morning Afternoon
65 Chicago 77 53
64 Moline 78 51
65 Peoria 78 52
66 Rockford 80 51
65 Springfield 79 52

Highest and Lowest Humidity

Below are the averages during April 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 April
High Time Place Low Time
77.1 6 am Chicago 52.8 3 pm
78.0 6 am Moline 50.6 3 pm
78.0 6 am Peoria 51.9 3 pm
80.1 6 am Rockford 51.0 3 pm
78.9 6 am Springfield 52.3 3 pm

World Data Center for Meteorology. Climate of the World.

Illinois Humidity
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