Average humidity in Mettawa (IL)
The mean monthly relative humidity over the year in Mettawa (Illinois), the United States of America.
- On average, December is the most humid month, at 76.0%.
- On average, May is the least humid month, at 64.0%.
- The average annual percentage of humidity is 70%.
Forecast for Mettawa (IL)
partly cloudy and chance of slight rain
clear and no rain
clear and no rain