Humidity Levels in Iowa During October





The average humidity in October 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 October
Daily Place Morning Afternoon
67 Des Moines 79 51
Dubuque 82 55
66 Sioux City 81 47
70 Waterloo 83 52

Highest and Lowest Humidity

Below are the averages during October 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 October
High Time Place Low Time
79.4 6 am Des Moines 50.9 3 pm
81.6 6 am Dubuque 54.6 3 pm
81.2 6 am Sioux City 46.9 3 pm
83.4 6 am Waterloo 52.2 3 pm
Reference

World Data Center for Meteorology. Climate of the World.

Iowa Humidity
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