Average humidity in Decorah (IA)
The mean monthly relative humidity over the year in Decorah (Iowa), the United States of America.
- On average, December is the most humid month, at 76.0%.
- On average, April is the least humid month, at 63.0%.
- The average annual percentage of humidity is 70%.
Forecast for Decorah (IA)
broken clouds and no rain
broken clouds and no rain
overcast and no rain