Average humidity in National Harbor (MD)
The mean monthly relative humidity over the year in National Harbor (Maryland), the United States of America.
- On average, August is the most humid month, at 69.0%.
- On average, March is the least humid month, at 58.0%.
- The average annual percentage of humidity is 64%.
Forecast for National Harbor (MD)
overcast and heavy rain
broken clouds and rain
partly cloudy and chance of rain