Humidity Levels in Illinois During March

The average humidity in March 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 March
Daily Place Morning Afternoon
70 Chicago 79 59
68 Moline 78 57
71 Peoria 81 59
71 Rockford 82 59
71 Springfield 81 60

Highest and Lowest Humidity

Below are the averages during March 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 March
High Time Place Low Time
78.9 6 am Chicago 58.6 3 pm
77.8 6 am Moline 57.0 3 pm
80.8 6 am Peoria 58.6 3 pm
81.5 6 am Rockford 59.2 3 pm
81.2 6 am Springfield 59.9 3 pm

World Data Center for Meteorology. Climate of the World.

Illinois Humidity
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