Average monthly snow and rainfall in Duncan (OK)
The mean monthly precipitation over the year in Duncan (Oklahoma), including rain, snow, hail.
- Most rainfall (rainy season) is seen in May and June.
- On average, May is the wettest month with 148 mm of precipitation.
- On average, January is the driest month with 27 mm of precipitation.
- The average amount of annual precipitation is 881 mm.
Forecast for Duncan (OK)
clear and no rain
almost clear and no rain
partly cloudy and no rain