Average humidity in Heathrow
The mean monthly relative humidity over the year in Heathrow (), the United Kingdom.
- On average, November is the most humid month, at 81.0%.
- On average, April is the least humid month, at 64.0%.
- The average annual percentage of humidity is 71%.
Forecast for Heathrow
broken clouds and no rain
overcast and no rain
broken clouds and no rain