Annual Average Humidity in Pennsylvania





The average humidity year round 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 yearly relative humidity (%)
Daily Place Morning Afternoon
68 Allentown 80 55
72 Erie 78 65
67 Harrisburg 77 54
67 Philadelphia 76 54
68 Pittsburgh 78 55
69 Wilkes-Barre & Scranton 80 57
71 Williamsport 82 55

Highest and Lowest Humidity

Below are averages over the year for maximum and minimum humidity levels in Pennsylvania. The hours when the highest and lowest humidity readings usually occur are given in local standard time.

Annual averages for daily high and low relative humidity (%)
High Time Place Low Time
80.5 4 am Allentown 54.6 4 pm
78.2 4 am Erie 64.9 4 pm
77.3 4 am Harrisburg 53.7 4 pm
77.9 4 am Philadelphia 54.0 4 pm
78.4 7 am Pittsburgh 55.4 4 pm
79.5 7 am Wilkes-Barre & Scranton 57.1 4 pm
83.3 4 am Williamsport 55.4 4 pm
Reference

World Data Center for Meteorology. Climate of the World.

Pennsylvania Humidity
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