Average humidity in Helena (MT)
The mean monthly relative humidity over the year in Helena (Montana), the United States of America.
- On average, December is the most humid month, at 68.0%.
- On average, July is the least humid month, at 46.0%.
- The average annual percentage of humidity is 57%.
Forecast for Helena (MT)
almost clear and no rain
partly cloudy and no rain
partly cloudy and small chance of slight rain