Humidity Levels in Montana During September





The average humidity in September is listed below for places in Montana. 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 8 am and Afternoon measures are for 5 pm local standard time.

Average relative humidity (%) in September
Daily Place Morning Afternoon
52 Billings 63 37
55 Glasgow 65 38
53 Great Falls 60 38
55 Helena 66 36
65 Kalispell 78 43
54 Miles City 65 38
63 Missoula 80 40

Highest and Lowest Humidity

Below are the averages during September for maximum and minimum humidity levels in Montana. 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
65.5 5 am Billings 37.1 2 pm
72.3 5 am Glasgow 38.1 5 pm
67.1 5 am Great Falls 37.8 5 pm
72.6 5 am Helena 35.9 5 pm
82.5 5 am Kalispell 42.9 5 pm
71.0 5 am Miles City 37.6 2 pm
82.7 5 am Missoula 39.6 5 pm
Reference

World Data Center for Meteorology. Climate of the World.

Montana Humidity
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