Humidity Levels in Pennsylvania During May





The average humidity in May 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 May
Daily Place Morning Afternoon
66 Allentown 77 51
69 Erie 76 58
65 Harrisburg 76 52
65 Philadelphia 74 52
63 Pittsburgh 76 50
65 Wilkes-Barre & Scranton 77 51
67 Williamsport 81 50

Highest and Lowest Humidity

Below are the averages during May 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 May
High Time Place Low Time
81.3 4 am Allentown 50.9 4 pm
78.2 4 am Erie 58.2 4 pm
78.8 4 am Harrisburg 51.7 4 pm
79.3 4 am Philadelphia 51.5 4 pm
77.0 4 am Pittsburgh 49.5 4 pm
77.8 4 am Wilkes-Barre & Scranton 51.0 4 pm
85.0 4 am Williamsport 49.9 4 pm
Reference

World Data Center for Meteorology. Climate of the World.

Pennsylvania Humidity
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