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Hourly Forecast
Daylight Hours
06:33
Sunrise
18:47
Sunset
Moon
Waxing Crescent
11:11
Moonrise
20:31
Moonset
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Weather in Portland today, September 15, 2026
Conditions in Portland on September 15, 2026 favour clear skies, so the day opens with a fine, sunny outlook. Any interruptions to the blue should be brief rather than lasting. The first half of the day looks overcast, as cloud amounts reach about 62% around 08:00. Brighter weather, if it comes, waits until later.
Expect highs of 36°C and cooler readings close to 17°C. Moisture in the air spans 30%-83%, with the highest values around 23:00. A lighter breeze peaks around 08:00 near 5.0 km/h.
The afternoon keeps an overcast feel, as cloud reaches about 78% around 18:00. Outdoor plans may still want a flexible backup. Visibility stays near 16.1 km. Expect sunrise at 06:33, sunset at 18:47, and 12 hours 13 minutes of sunlight today overall.
Taken together, settled sunshine in Portland on September 15, 2026 makes outdoor timing easier, with highs near 36°C.
Frequently asked questions about weather in Portland
How warm does it get in Portland?
The warmest month in Portland is July, with average high temperatures of 32°C. The average temperature during this period is around 27°C.
How cold does it get in Portland?
The coldest month in Portland is January, with average low temperatures of 0°C. The average temperature during this period is around 4°C.
What is the wettest time of year in Portland?
The wettest month in Portland is February, with an average of 169mm of precipitation.
What is the driest time of year in Portland?
The driest month in Portland is November, with an average of 86mm of precipitation.
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