Humidity Levels in Iowa During March

The average humidity in March is listed below for places in Iowa. 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
68 Des Moines 78 56
Dubuque 79 59
70 Sioux City 80 56
73 Waterloo 81 61

Highest and Lowest Humidity

Below are the averages during March for maximum and minimum humidity levels in Iowa. 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
77.8 6 am Des Moines 55.8 3 pm
78.8 6 am Dubuque 59.4 3 pm
79.8 6 am Sioux City 56.3 3 pm
81.4 6 am Waterloo 61.3 3 pm

World Data Center for Meteorology. Climate of the World.

Iowa Humidity
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