Monthly Humidity Averages for Oklahoma





The humidity averages for each month are listed below for places in Oklahoma. 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 6 am and Afternoon measures are for 3 pm local standard time.

Average relative humidity (%) for Oklahoma City, Oklahoma
Daily   Morning Afternoon
67 January 77 51
66 February 77 51
61 March 75 46
61 April 77 45
68 May 83 51
67 June 84 51
61 July 80 44
62 August 80 43
67 September 83 49
64 October 79 46
67 November 79 50
68 December 78 52
65 Annual 79 48
Average relative humidity (%) for Tulsa, Oklahoma
Daily   Morning Afternoon
67 January 78 52
65 February 77 51
62 March 76 47
61 April 78 46
69 May 85 54
69 June 86 54
64 July 82 47
65 August 84 46
70 September 87 52
66 October 82 47
67 November 80 51
69 December 79 53
66 Annual 81 50

Highest and Lowest Humidity

Below are the monthly and yearly averages for maximum and minimum humidity levels in Oklahoma. 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 Oklahoma City, Oklahoma
High Time   Low Time
77.1 6 am January 50.7 3 pm
77.3 6 am February 50.5 3 pm
75.4 6 am March 45.8 3 pm
76.5 6 am April 45.2 3 pm
82.7 6 am May 51.2 3 pm
83.5 6 am June 50.7 3 pm
79.8 6 am July 43.5 3 pm
80.1 6 am August 43.4 3 pm
83.4 6 am September 48.9 3 pm
78.9 6 am October 46.0 3 pm
79.3 6 am November 49.5 3 pm
77.6 6 am December 51.8 3 pm
79.3 6 am Annual 48.1 3 pm
Daily high and low relative humidity (%) averages in Tulsa, Oklahoma
High Time   Low Time
77.5 6 am January 51.7 3 pm
77.0 6 am February 50.5 3 pm
75.8 6 am March 46.5 3 pm
77.5 6 am April 45.8 3 pm
85.3 6 am May 53.8 3 pm
85.6 6 am June 53.7 3 pm
81.9 6 am July 47.0 3 pm
83.6 6 am August 46.4 3 pm
86.5 6 am September 51.7 3 pm
82.4 6 am October 47.0 3 pm
79.6 6 am November 51.0 3 pm
78.9 6 am December 53.3 3 pm
81.0 6 am Annual 49.9 3 pm
Reference

World Data Center for Meteorology. Climate of the World.

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