ClimateForecastAprilMay >>

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)

Fri   Apr 26
17°C | 10°C
SW 18 km/h
3.1 mm
broken clouds and rain

broken clouds and rain

Sat   Apr 27
14°C | 9°C
S 18 km/h
3.3 mm
overcast and rain

overcast and rain

Sun   Apr 28
15°C | 9°C
W 18 km/h
2.4 mm
overcast and rain

overcast and rain

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