Temperature
Hot by day, brisk at night.
84°Ftypical Aug high
Typical range
Portland
United States · North America
Portland is most comfortable in May and June. Summers are warm and winters are cool. The wettest months are roughly October to March. Humidity is usually low.
Best time to go
12 mo · Typical year
Temperature range
36°F to 84°F
Rain
13 days/mo
Sunshine
6.4 h/day
Humidity feel
Generally dry
When to visit
Month-by-month fit
Precipitation
One of the driest months, with very little rain.
6%wet-day frequency
AmountWet-day chance
Sunshine
Very sunny skies.
9.6 hAug sunshine
Heat & humidity by month
Hot, mostly dry days.
LowAug heat feel
Easy airWarm airHot airHumid air
Hourly comfort pattern
In August, afternoons feel about 80° and nights feel near 58°.
Very coldColdCoolComfortableWarmNight shading
More detailIncludes sky, daypart comfort, and wind
Cloud cover
Predominantly clear skies.
64%Aug clear sky
ClearCloud cover
Typical August day
August late afternoons are around 82°F, easing to about 76°F in early evening.
Avg temp Typical range
Morning68°F
Rain6%
Cloud45%
Humid airLow
Sun intensityModerate
Midday76°F
Rain7%
Cloud40%
Humid airLow
Sun intensityStrong
Late afternoon82°F
Rain5%
Cloud35%
Humid airLow
Sun intensityStrong
Early evening76°F
Rain4%
Cloud26%
Humid airLow
Sun intensityLow
Best windowWind pattern
Calm winds are typical in August.
4 mphAug Calm
Typical wind speed (mph)
Similar
Similar things to doAshevilleUnited StatesSimilar things to doNew York CityUnited StatesSimilar things to doVancouverCanadaSimilar things to doPittsburghUnited States
Want a side-by-side climate view? Compare Portland with Asheville.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology