Average humidity in Chelmsford (MA)
The mean monthly relative humidity over the year in Chelmsford (Massachusetts), the United States of America.
- On average, August is the most humid month, at 72.0%.
- On average, February is the least humid month, at 62.0%.
- The average annual percentage of humidity is 67%.
Forecast for Chelmsford (MA)
overcast and heavy rain
almost clear and no rain
partly cloudy and no rain