Annual Average Humidity in Iowa
The average humidity year round 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.
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.
Highest and Lowest Humidity
Below are averages over the year for maximum and minimum humidity levels in Iowa. The hours when the highest and lowest humidity readings usually occur are given in local standard time.
|79.6||6 am||Des Moines||55.5||3 pm|
|80.9||6 am||Dubuque||58.8||3 pm|
|81.2||6 am||Sioux City||54.5||3 pm|
|82.8||6 am||Waterloo||57.9||3 pm|
World Data Center for Meteorology. Climate of the World.