Average humidity in Grantville (PA)
The mean monthly relative humidity over the year in Grantville (Pennsylvania), the United States of America.
- On average, September is the most humid month, at 73.0%.
- On average, April is the least humid month, at 59.0%.
- The average annual percentage of humidity is 67%.
Forecast for Grantville (PA)
overcast and snow
overcast and chance of rain
clear and no rain