Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed. The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).įor each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. The coldest month of the year in Portland is December, with an average low of 36☏ and high of 45☏.Īverage High and Low Temperature in Portland The cool season lasts for 3.2 months, from November 15 to February 22, with an average daily high temperature below 52☏. The hottest month of the year in Portland is August, with an average high of 83☏ and low of 57☏. The warm season lasts for 2.9 months, from June 23 to September 19, with an average daily high temperature above 76☏. Click on each chart for more information.

ColdcoolcomfortablewarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow82%82%24%24%clearovercastprecipitation: 9.5 inprecipitation: 9.5 in0.4 in0.4 inmuggy: 1%muggy: 1%0%0%drydrytourism score: 7.4tourism score: 7.40.10.1

Portland oregon weather forecast