Humidity Levels in Michigan During September





The average humidity in September is listed below for places in Michigan. 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 7 am and Afternoon measures are for 4 pm local standard time.

Average relative humidity (%) in September
Daily Place Morning Afternoon
79 Alpena 91 62
73 Detroit 87 55
76 Flint 89 58
76 Grand Rapids 89 58
79 Houghton Lake 92 61
78 Lansing 91 59
76 Muskegon 88 62
82 Sault Ste Marie 92 67

Highest and Lowest Humidity

Below are the averages during September for maximum and minimum humidity levels in Michigan. 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
91.0 7 am Alpena 61.3 1 pm
87.4 7 am Detroit 55.4 4 pm
88.8 7 am Flint 57.9 4 pm
89.0 7 am Grand Rapids 58.4 4 pm
91.5 7 am Houghton Lake 61.1 4 pm
90.8 7 am Lansing 58.8 4 pm
88.3 7 am Muskegon 62.3 4 pm
92.2 7 am Sault Ste Marie 66.5 4 pm
Reference

World Data Center for Meteorology. Climate of the World.

Michigan Humidity
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