Portland Weather
Portland lies within the Marine west coast climate zone, 
although a drying trend in summer is a characteristic of the Mediterranean climate. Summers in Portland are warm, sunny and rather dry, with July averaging a high of 81 °F and a low of 58 °F. Due to its inland location and when there is an absence of a sea breeze, Heatwaves occur with air temperatures rising to over 100 °F. Winters can be mild to cold, and very moist, with January averaging a high of 46 °F and a low of 37 °F, cold snaps are short lived. Spring can bring rather unpredictable weather, resulting from warm spells, to thunderstorms rolling off the Cascade Range.
The rainfall averages 37.5 inches per year in downtown Portland. Portland averages 155 days with measurable precipitation a year. Snowfall occurs no more than a few times per year, although the city has been known to see major snow and ice storms thanks to cold air outflow from the Columbia River Gorge. The city’s winter snowfall totals have ranged from just a trace on many occasions, to 60.9 inches in 1892-93. The lowest temperature ever recorded in Portland was ?3 °F, set on February 2, 1950. The highest temperature ever recorded was 107 °F, set on July 30, 1965 as well as August 8, 1981, and August 10, 1981. Temperatures of 100 °F have been recorded in each of the months from May through September.