Annual Average Humidity in Michigan

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The average humidity year round 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 yearly relative humidity (%)
Daily Place Morning Afternoon
74 Alpena 83 60
71 Detroit 81 58
72 Flint 82 59
73 Grand Rapids 83 60
75 Houghton Lake 85 61
74 Lansing 84 61
73 Muskegon 81 63
77 Sault Ste Marie 85 66

Highest and Lowest Humidity

Below are averages over the year for maximum and minimum humidity levels in Michigan. The hours when the highest and lowest humidity readings usually occur are given in local standard time.

Annual averages for daily high and low relative humidity (%)
High Time Place Low Time
83.9 4 am Alpena 59.8 4 pm
81.4 7 am Detroit 57.9 4 pm
82.0 4 am Flint 59.1 4 pm
82.7 4 am Grand Rapids 59.9 4 pm
85.4 7 am Houghton Lake 61.1 4 pm
84.2 4 am Lansing 60.8 4 pm
81.3 7 am Muskegon 62.6 4 pm
85.5 4 am Sault Ste Marie 65.5 4 pm
Reference

World Data Center for Meteorology. Climate of the World.

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