SeasonScore
Portland, United States
Photo: Matt Perreault · CC BY-SA 2.0

United States

Portland in August

☀️ Summer

Warm and mostly dry.

🎒 Pack: light, breathable clothes & sunscreen · sunglasses & hat

Best months: Jul (9.6), Jun (9.5), Aug (9.5)

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Why August scores 9.5What goes into the score

How it works
🌡️ 31° / 15°C🌧️ 13 mm💧 dew pt 12°🍃 PM2.5 5
  • Weather comfort9.5
    • ✓Warm (30.9°C highs / 14.8°C lows)
    • ✓Comfortable humidity (dew point 11.6°C)
    • ✓Mostly dry (~13 mm rain)
  • Air quality10.0
    • ✓Good (within WHO guideline) (PM2.5 ~5 µg/m³)
  • Seasonal hazards10.0
    • ·No notable seasonal hazards
  • Safety baseline7.5
    • ·Increased caution
Compare monthsPut August side by side with another month
AugJul
Score9.5 Excellent9.6 Excellent
Season☀️ Summer☀️ Summer
High / low31° / 15°29° / 14°
Rain13 mm7 mm
Humiditydew pt 12°dew pt 13°
PM2.55 µg/m³4 µg/m³

Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast).

Holidays & crowdsAugust 2027

No long holidays

No long public-holiday weekends this month. School holidays aren't counted, so check those if you want to avoid family crowds.

No national public holidays in United States this month.

National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).

Explore PortlandEvents, sights, food & souvenirs

Check event dates locally

Oregon's largest city, known for its food carts, craft beer and coffee, its gardens and easy day trips to the Columbia River Gorge and Mount Hood.

Events in August

No major events on our calendar for August.

Coming up later

Christmas Ships ParadeDate variesUsually most evenings in mid-December

A fleet of private boats decorated with lights sails along the rivers on set routes.

Why go: Viewing is free from the riverbanks; dress for cold, wet weather.

Where: Willamette and Columbia rivers

Portland Rose FestivalDate variesUsually late May through June

A city festival since 1907 with a riverside funfair, dragon boat races and the Grand Floral Parade.

Why go: The parade draws large crowds; arrive early for a kerbside spot.

Where: Waterfront Park and city streets