See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
18°
Mostly Clear
Feels Like: 18°
Min: 16°
Max: 19°
The next few hours will be overcast, with today reaching 19°C and dropping to 15°C. The coming days will be partly cloudy
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:53
Sunrise
19:15
Sunset
Moon
Waxing Crescent
12:08
Moonrise
20:29
Moonset
Daily Forecast
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Wednesday
Thursday
Friday
Saturday
Sunday
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Thursday
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Weather in Portland tomorrow, September 16, 2026
Portland looks cloudy on September 16, 2026, with grey skies for much of the day. Sunshine stays limited, so the overall tone is muted from the morning onward. Morning skies stay relatively clear, holding cloud close to 41% near 11:00. The early part of the day favours being outside.
Expect highs of 18°C and cooler readings close to 15°C. Relative humidity sits between 62% and 84%, reaching its peak around 03:00. Airflow remains manageable, reaching about 4.7 km/h around 17:00.
Through the afternoon cloud remains the main feature, with cover near 99% around 15:00. Bright spells should stay limited even as the day wears on. Horizontal visibility sits around 33.8 km, briefly nearer 27.4 km. Daylight runs from 06:55 to 19:12, lasting 12 hours 17 minutes of sunlight today.
Overall, Portland on September 16, 2026 stays grey and muted, so outdoor plans may want a flexible backup even with a high near 18°C.
Frequently asked questions about weather in Portland
How warm does it get in Portland?
The warmest month in Portland is August, with average high temperatures of 18°C. The average temperature during this period is around 17°C.
How cold does it get in Portland?
The coldest month in Portland is January, with average low temperatures of 6°C. The average temperature during this period is around 8°C.
What is the wettest time of year in Portland?
The wettest month in Portland is October, with an average of 133mm of precipitation.
What is the driest time of year in Portland?
The driest month in Portland is July, with an average of 44mm of precipitation.
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