Average humidity in Portland (IN)
The mean monthly relative humidity over the year in Portland (Indiana), the United States of America.
- On average, December is the most humid month, at 77.0%.
- On average, May is the least humid month, at 65.0%.
- The average annual percentage of humidity is 70%.
Forecast for Portland (IN)
almost clear and no rain
partly cloudy and small chance of slight rain
almost clear and no rain