Average humidity in Altoona (IA)
The mean monthly relative humidity over the year in Altoona (Iowa), the United States of America.
- On average, January is the most humid month, at 72.0%.
- On average, May is the least humid month, at 60.0%.
- The average annual percentage of humidity is 67%.
Weather Forecasts for Altoona (IA)
almost clear and chance of rain
partly cloudy and chance of slight rain
overcast and thunder