15-Day Weather Forecast - Portland
15-day weather forecast for Portland: temperatures from 11°C (52°F) to 32°C (90°F). Average daily high 24°C (75°F) over the next 15 days.
Hourly Forecast by Day
15-Day Temperature Trend
15-Day Weather Forecast
Updated just nowWeather Insight
Portland's 15-day outlook ranges from a low of 11°C to a high of 32°C, with an average daytime high near 24°C. That's 1° below the long-term average high of 25°C for this time of year. It continues a recent pattern — 3 of the last 19 days with published data have run cooler than normal. Air quality is currently Moderate (AQI 53), driven mainly by PM2.5 at 9.2 μg/m³.
Today vs Normal
The long-term average high for today is 25°C.
3 of the last 19 days with published data ran above normal.
It continues that pattern - today's forecast is also running below normal.
Red = above normal, blue = at or below · last 12 days
Air Quality
Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.
Extended Outlook for Portland
Over the next 15 days, Portland is forecast to see temperatures ranging from 11°C to 32°C, averaging a daily high of 24°C. The extended outlook indicates occasional showers on 4 days, with 9.3 mm total accumulation. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.