National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Portland, Portland International Jetport (KPWM)

Lat: 43.64°NLon: 70.3°WElev: 72ft.

Mostly Cloudy

85°F

29°C

Humidity 48%
Wind Speed NW 12 mph
Barometer 29.77 in (1008.1 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 4 Jul 5:51 pm EDT
Extended Forecast for

Riverton ME

  • Tonight

    Tonight: Partly cloudy, with a low around 62. Northwest wind 10 to 15 mph becoming light in the evening. Winds could gust as high as 20 mph.

    Low: 62 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 85. Light and variable wind becoming southeast 5 to 10 mph in the afternoon.

    High: 85 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 59. Southeast wind around 5 mph becoming calm.

    Low: 59 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 80. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 80 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 56. South wind around 5 mph becoming calm.

    Low: 56 °F

    Mostly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers before 3pm. Partly sunny, with a high near 76.

    High: 76 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 62. Northwest wind 10 to 15 mph becoming light in the evening. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 85. Light and variable wind becoming southeast 5 to 10 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 59. Southeast wind around 5 mph becoming calm.
Monday
Mostly cloudy, with a high near 80. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 56. South wind around 5 mph becoming calm.
Tuesday
A 30 percent chance of showers before 3pm. Partly sunny, with a high near 76.
Tuesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 55.
Wednesday
Mostly sunny, with a high near 81.
Wednesday Night
Mostly clear, with a low around 60.
Thursday
Mostly sunny and hot, with a high near 92.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 67.
Friday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Saturday
Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Riverton ME
 43.69°N 70.32°W (Elev. 75 ft)
Last Update:
2:40 pm EDT Jul 4, 2026
Forecast Valid:
6pm EDT Jul 4, 2026-6pm EDT Jul 11, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation