Late summer · Weather & things to do
Portland in August
Portland's warmest month brings highs averaging 84°F (29°C), lows of 56°F (13°C) and about 0.8 in (20 mm) of rain.
At 89/100 for comfort (3rd of 12), it's one of the best months to visit.
- Avg high
- 84°F (29°C)
- Avg low
- 56°F (13°C)
- Rain
- 0.8 in (20 mm)
- Humidity
- 65%
- Cloud cover
- 40%
- Daylight
- ~13 h 56 min
- Comfort score
- 89/100 · Great
What August feels like
Highs settle around 84°F (29°C), warm enough for short sleeves most of the day.
Mornings start much cooler: lows average 56°F (13°C), about 16°C (28°F) below the afternoon high.
It's one of the drier stretches, with only about 0.8 in (20 mm) of rain.
Plan around August
August is one of Portland's best months on the climate data.
- Comfort slips from 94/100 in July to 89/100.
- August sits inside the Jun – Sep window our Pacific Northwest route recommends.
What to pack for August
- Light, breathable clotheshighs average 84°F
- Sunscreen, sunglasses and a hathigh UV on clear days
- A warm layer for eveningsnights drop to 56°F
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Portland in August
August is good outdoor weather here, so these picks lean toward the open air.
Multnomah Whiskey Library
Leather-and-wood whiskey bar with 1,500+ bottles and a rolling cart service.
Multnomah Falls
Oregon's tallest waterfall at 620 feet, 30 minutes east in the Columbia River Gorge.
Why now August scores 89/100 for comfort, good conditions for being outside.
Lan Su Chinese Garden
Walled Ming-style garden with a teahouse in Old Town Chinatown.
Why now Highs near 84°F and 0.8 in of monthly rain make this an easy outdoor pick.
Screen Door
Southern comfort food; known for fried chicken and waffles.
International Rose Test Garden
Free garden of 10,000+ rose bushes with city and Mount Hood views.
Why now One to do outside while the weather is on your side.
Nearby in August
- Cannon Beach in August~67 mi · highs 68°F, 1.1 in rain · 9°C (16°F) cooler by day, about as wet
- Astoria in August~72 mi · highs 68°F, 1.1 in rain · 9°C (16°F) cooler by day, about as wet
- Yachats in August~109 mi · highs 61°F, 0.6 in rain · 13°C (23°F) cooler by day, about as wet
- Snoqualmie Pass in August~145 mi · highs 69°F, 1.5 in rain · 9°C (15°F) cooler by day, wetter
These averages also cover Downtown Portland and Northwest Portland.
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~257 m to Portland's ~21 m elevation (standard lapse rate). Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Portland in August: quick answers
Is August a good time to visit Portland?
Yes. On the climate data it's one of the best months, scoring 89/100. Expect highs of 84°F (29°C) and 0.8 in (20 mm) of rain. August is inside the Jun – Sep window our Pacific Northwest route recommends.
How hot is Portland in August?
Average highs are 84°F (29°C) and average lows 56°F (13°C), making it the warmest month by daytime highs.
Does it rain a lot in Portland in August?
Not much: about 0.8 in (20 mm) of rain falls across August on average, the 2nd-driest month of the year. The annual total is about 58.4 in (1484 mm).
What should I pack for Portland in August?
Bring light, breathable clothes (highs average 84°F), sunscreen, sunglasses and a hat (high UV on clear days), a warm layer for evenings (nights drop to 56°F) and comfortable walking shoes (most places below are best reached on foot or with short walks).
More on Portland
Routes in season in August
- Pacific Northwest Jun – Sep
Planning Portland in August?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.