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Portland
Weather averages
ClimateForecastJulyAugust >>

Portland (OR) Climate by Month

The graphs below provide an overview of the climate in Portland (Oregon), the United States of America. They present long-term patterns and averages of weather conditions over a 30-year period.

Average day and night temperature

The mean minimum and maximum temperatures over the year.

Monthly hours of sunshine

The average monthly total hours of sunshine over the year

Monthly precipitation

The mean monthly precipitation over the year, including rain, snow, hail etc.

Monthly rainy days

The average number of days each month with rain, snow, hail etc.

Average humidity

The mean monthly relative humidity over the year

Average wind speed

The mean monthly wind speed over the year (in meters per second)

Forecast for Portland (OR)

Fri   Jul 26
29°C | 11°C
NW 18 km/h
clear and no rain

clear and no rain

hourly forecast
Sat   Jul 27
28°C | 14°C
NW 11 km/h
almost clear and no rain

almost clear and no rain

hourly forecast
Sun   Jul 28
27°C | 13°C
N 11 km/h
partly cloudy and no rain

partly cloudy and no rain

hourly forecast
5-Day Forecast 10-Day Forecast

The best time of year to visit Portland in the United States of America

Portland has a Mediterranean climate, which means a pleasantly warm summer and mild winters. Sometimes temperatures during winter will drop below zero, but this will only be at night.

It can rain quite a bit, especially during winters. The best time to visit Portland in the state of Oregon is from May to September. During this period you have a warm temperature and almost no precipitation.

During the months of May, June and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:

  • Which months have the greatest rainfall in Portland?
    Most rainfall (rainy season) is seen in November and December.
  • Does Portland have a dry season?
    Yes, the months of July and August are very dry.
  • Which is the warmest month in Portland?
    August has an average maximum temperature of 28°C and is the warmest month of the year.
  • Which is the coldest month in Portland?
    The coldest month is December with an average maximum temperature of 7°C.
  • Which is the wettest month in Portland?
    December tops the wettest month list with 179 mm of rainfall.
  • Which is the driest month in Portland?
    August is the driest month with 11 mm of precipitation.
  • Which is the sunniest month in Portland?
    July is the sunniest month with an average of 332 hours of sunshine.

    • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

     

     

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