Weather in Portland
What's the weather like in Portland?
Portland has a wide swing between hot summers and cold winters and moderate rainfall spread across the year. Average daytime highs range from 9°C (47°F) in January to 29°C (83°F) in July, with overnight lows around 2°C (36°F) and 15°C (58°F) respectively.
For comfortable sightseeing temperatures (18–26°C daytime highs), the best months to visit Portland are May through June, and September.
Quick facts
- Country
- 🇺🇸 United States
- Region
- North America
- Time zone
- America/Los_Angeles
- Coordinates
- 45.515, -122.678
Monthly climate
Long-run averages for each month of the year.
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 9°C / 47°F | 2°C / 36°F | 170 mm | 21 | — |
| February | 9°C / 48°F | 2°C / 35°F | 147 mm | 20 | — |
| March | 12°C / 54°F | 3°C / 38°F | 148 mm | 21 | — |
| April | 15°C / 60°F | 6°C / 42°F | 115 mm | 19 | — |
| May | 20°C / 68°F | 9°C / 49°F | 71 mm | 15 | — |
| June | 24°C / 75°F | 12°C / 54°F | 55 mm | 12 | — |
| July | 29°C / 83°F | 15°C / 58°F | 9 mm | 5 | — |
| August | 29°C / 84°F | 15°C / 60°F | 13 mm | 7 | — |
| September | 24°C / 75°F | 12°C / 54°F | 61 mm | 12 | — |
| October | 17°C / 63°F | 9°C / 47°F | 143 mm | 17 | — |
| November | 11°C / 51°F | 4°C / 40°F | 175 mm | 20 | — |
| December | 7°C / 45°F | 2°C / 36°F | 216 mm | 21 | — |
Portland by month
Detailed weather for any specific month:
Seasonal patterns to know
Atlantic hurricane season runs June–November (peak August–October). Tropical storms and hurricanes are possible — peak risk is August–October.
Cities with a similar climate to Portland
Frequently asked questions
When is the best time to visit Portland?
The most comfortable months in Portland are usually May, June, September, when average highs sit near 18–26°C (64–79°F) with relatively little rain. See the full month-by-month breakdown for the exact figures.
What is the hottest month in Portland?
August is typically the hottest month in Portland, averaging a high of 29°C (84°F).
What is the coldest month in Portland?
February is usually the coldest, with average lows around 2°C (35°F).
Does it snow in Portland?
Snow is rare in Portland; the climate data shows essentially no snowfall across the year.
Live forecast, sunrise/sunset, and more.