Humidity Levels in South Dakota During September

The average humidity in September is listed below for places in South Dakota. 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. At one place, Rapid City, humidity data are for 8 am and 5 pm.

Average relative humidity (%) in September
Daily Place Morning Afternoon
66 Aberdeen 84 46
68 Huron 87 46
54 Rapid City 57 39
70 Sioux Falls 86 51

Highest and Lowest Humidity

Below are the averages during September for maximum and minimum humidity levels in South Dakota. 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 September
High Time Place Low Time
84.3 6 am Aberdeen 45.5 3 pm
86.7 6 am Huron 46.2 3 pm
69.8 5 am Rapid City 36.1 2 pm
85.5 6 am Sioux Falls 50.9 3 pm

World Data Center for Meteorology. Climate of the World.

South Dakota Humidity
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