Monthly Humidity Averages for Utah

The humidity averages for each month are listed below for Salt Lake City, Utah. The tables give the 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 for the month or year 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 (%) for Salt Lake City, Utah
Daily   Morning Afternoon
74 January 78 69
70 February 77 59
60 March 68 47
53 April 58 39
49 May 51 33
41 June 44 26
36 July 39 22
39 August 44 23
46 September 52 29
56 October 64 41
66 November 74 58
74 December 79 71
55 Annual 61 43

Highest and Lowest Humidity

Below are the monthly and yearly averages for maximum and minimum humidity levels in Utah. The hours when a month's highest and lowest humidity readings usually occur are given in local standard time.

Daily high and low relative humidity (%) averages in Salt Lake City, Utah
High Time   Low Time
78.4 5 am January 63.3 2 pm
77.3 5 am February 55.7 2 pm
70.4 5 am March 45.8 2 pm
66.4 5 am April 38.9 5 pm
65.0 5 am May 33.2 5 pm
59.3 5 am June 25.9 5 pm
52.2 5 am July 21.7 5 pm
54.4 5 am August 23.2 5 pm
60.8 5 am September 28.7 2 pm
68.1 5 am October 36.7 2 pm
74.2 5 am November 49.7 2 pm
78.8 8 am December 63.0 2 pm
67.1 5 am Annual 40.8 2 pm
Reference

World Data Center for Meteorology. Climate of the World.

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