Humidity Levels in Virginia During September

The average humidity in September is listed below for places in Virginia. 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 relative humidity (%) in September
Daily Place Morning Afternoon
70 Arlington 81 55
75 Chantilly 89 55
71 Lynchburg 88 56
74 Norfolk 83 62
77 Richmond 90 57
74 Roanoke 88 55

Highest and Lowest Humidity

Below are the averages during September for maximum and minimum humidity levels in Virginia. 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
82.2 4 am Arlington 54.7 4 pm
90.7 4 am Chantilly 54.9 4 pm
88.0 7 am Lynchburg 55.5 4 pm
84.9 4 am Norfolk 60.6 1 pm
91.4 4 am Richmond 56.9 1 pm
88.7 4 am Roanoke 55.4 4 pm

World Data Center for Meteorology. Climate of the World.

Virginia Humidity
Back to Top