Humidity Levels in Pennsylvania During August

The average humidity in August is listed below for places in Pennsylvania. 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 August
Daily Place Morning Afternoon
72 Allentown 86 54
74 Erie 82 63
72 Harrisburg 84 55
70 Philadelphia 81 55
71 Pittsburgh 86 54
74 Wilkes-Barre & Scranton 87 57
77 Williamsport 91 57

Highest and Lowest Humidity

Below are the averages during August for maximum and minimum humidity levels in Pennsylvania. 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 August
High Time Place Low Time
87.8 4 am Allentown 54.2 4 pm
83.5 4 am Erie 62.9 4 pm
86.4 4 am Harrisburg 55.3 4 pm
84.4 4 am Philadelphia 54.6 1 pm
85.8 4 am Pittsburgh 54.4 4 pm
87.4 7 am Wilkes-Barre & Scranton 56.6 4 pm
92.5 4 am Williamsport 56.7 4 pm
Reference

World Data Center for Meteorology. Climate of the World.

Pennsylvania Humidity
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