Portland, OR Weather
Portland hourly forecast: next 24 hours
Today's high of 73°F (23°C) is about 11°F (6°C) below the typical August high of 84°F (29°C).
Current conditions in detail
Portland weather tomorrow (Tuesday, August 18)
Tomorrow in Portland looks patchy rain nearby, with a high of 46° and an overnight low of 43°. There is a 42% chance of rain - plan accordingly. Winds top out near 16 mph, and the UV index reaches 7 (high).
Portland 14-day forecast
About the weather in Portland
Portland has a Mediterranean climate, marked by hot, dry summers and mild, wetter winters. Average daytime highs range from about 46°F (8°C) in December to around 84°F (29°C) in August, and the city records roughly 148 days of measurable precipitation a year.
Portland weather: quick facts
- Hottest month: August - highs near 84°F (29°C)
- Coldest month: December - highs near 46°F (8°C)
- Record high: 115°F (46°C) · Record low: 6°F (-14°C) (2015–2024)
- Wettest month: December (19 rainy days) · Sunniest: July (13.2 h sun/day)
- Climate type: Mediterranean - hot, dry summers and mild, wetter winters
- Snow: about 9 days a year
Temperatures through the year
The warmest stretch of the year centers on August. Highs average 84°F (29°C) and overnight lows stay near 59°F (15°C). The coolest month is December, with typical highs of 46°F (8°C) and lows around 36°F (2°C). Based on 2015–2024 weather data, temperatures have reached as high as 115°F (46°C) and dropped as low as 6°F (-14°C).
Rain, sun and snow
December is usually the wettest month. It brings about 8.9 inches (225 mm) of rain over 19 days, while July is the driest. July brings the most sunshine, averaging 13.2 hours of sun a day. Snow falls on about 9 days in a typical year, mostly from December through April.
Season by season
Spring (March through May)
Spring in Portland is mild, with daytime highs averaging 60°F (16°C) and nights around 43°F (6°C); expect showers on roughly 43 days across the season, plus around 3 snowy days.
Summer (June through August)
Summer in Portland is hot, with daytime highs averaging 81°F (27°C) and nights around 57°F (14°C); rain falls on about 13 days over the three months.
Fall (September through November)
Fall in Portland is crisp but comfortable, with daytime highs averaging 63°F (17°C) and nights around 47°F (8°C); expect showers on roughly 37 days across the season.
Winter (December through February)
Winter in Portland is chilly, with daytime highs averaging 47°F (8°C) and nights around 36°F (2°C); expect showers on roughly 55 days across the season, plus around 6 snowy days.
Average temperatures in Portland by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 47° | 36° | 19 | 7.5 in | 4.1 h/day | 85% |
| February | 48° | 35° | 16 | 5.9 in | 5.2 h/day | 83% |
| March | 54° | 38° | 17 | 5.4 in | 7.4 h/day | 80% |
| April | 59° | 42° | 15 | 4.4 in | 8.9 h/day | 76% |
| May | 67° | 48° | 11 | 2.8 in | 10.1 h/day | 73% |
| June | 75° | 53° | 8 | 2.2 in | 12.0 h/day | 66% |
| July | 83° | 58° | 2 | 0.3 in | 13.2 h/day | 58% |
| August | 84° | 59° | 3 | 0.5 in | 12.1 h/day | 59% |
| September | 75° | 54° | 8 | 2.5 in | 9.9 h/day | 68% |
| October | 63° | 47° | 12 | 5.4 in | 7.1 h/day | 79% |
| November | 52° | 40° | 17 | 7.5 in | 5.1 h/day | 84% |
| December | 46° | 36° | 19 | 8.9 in | 3.8 h/day | 86% |