Humidity Levels in Montana During December





The average humidity in December 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 December
Daily Place Morning Afternoon
61 Billings 65 57
75 Glasgow 78 73
63 Great Falls 66 61
68 Helena 73 66
81 Kalispell 84 79
73 Miles City 76 70
84 Missoula 87 80

Highest and Lowest Humidity

Below are the averages during December 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 December
High Time Place Low Time
65.3 8 am Billings 53.4 2 pm
77.6 8 am Glasgow 67.4 2 pm
66.0 8 am Great Falls 56.0 2 pm
73.3 8 am Helena 59.5 2 pm
83.7 8 am Kalispell 75.3 2 pm
76.5 5 am Miles City 65.6 2 pm
87.1 8 am Missoula 76.2 2 pm
Reference

World Data Center for Meteorology. Climate of the World.

Montana Humidity
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