Portland · August
Run in the morning.
Comfortable average high of 84°F, dipping to 60°F at night. Comfortable conditions all day, but morning consistently delivers the best combination of cool air and clear skies.
Avg high / low
84° / 60°F
Humidity
58%
Rain days
5/mo
Wind
9 mph
What August feels like in Portland
Sunrise
06:13
Mid-month average
Sunset
20:15
Mid-month average
Time-of-day breakdown
Morning
Steady cool air, low wind, and good light. The standard runner window in most months.
Midday
Mild but UV and traffic peak. Workable if you don't mind shifting your pace.
Evening
Warm and runnable. Crowded routes but the air's typically calm.
What to wear running in Portland in August
The kit for August in Portland: shorts and a short-sleeve are the standard kit.
August vs the surrounding months
vs July
+1° avg high
+1 rain days
Portland in July →
August
84°F avg high
5 rain days
Best: morning
vs September
+9° avg high
-5 rain days
Portland in September →
Frequently Asked Questions
What is the best time of day to run in Portland in August?+
Morning. Comfortable conditions all day, but morning consistently delivers the best combination of cool air and clear skies.
What's the average temperature in Portland in August?+
Average high 84°F, average low 60°F.
How does August compare to surrounding months in Portland?+
Compared to July (avg high 83°F), August is warmer. Compared to September (avg high 75°F), August is warmer.
Does it rain often in Portland in August?+
Expect about 5 measurable rain days in August, on average.