Average humidity in Oshawa
The mean monthly relative humidity over the year in Oshawa (Ontario), Canada.
- On average, September is the most humid month, at 87.0%.
- On average, May is the least humid month, at 76.0%.
- The average annual percentage of humidity is 81%.
Forecast for Oshawa
broken clouds and no rain
broken clouds and chance of slight rain
overcast and small chance of slight rain