Average monthly snow and rainfall in Portland (OR)
The mean monthly precipitation over the year in Portland (Oregon), including rain, snow, hail.
- A lot of rain (rainy season) falls in the months: January, March, November and December.
- Portland has dry periods in July and August.
- On average, December is the wettest month with 179 mm of precipitation.
- On average, August is the driest month with 11 mm of precipitation.
- The average amount of annual precipitation is 1050 mm.
Weather Forecasts for Portland (OR)
broken clouds and rain
overcast and rain
overcast and rain