Average humidity in Irwin (PA)
The mean monthly relative humidity over the year in Irwin (Pennsylvania), the United States of America.
- On average, September is the most humid month, at 72.0%.
- On average, April is the least humid month, at 59.0%.
- The average annual percentage of humidity is 68%.
Forecast for Irwin (PA)
broken clouds and rain
overcast and chance of slight rain
almost clear and no rain