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.

Fair

56°F

13°C

Humidity 84%
Wind Speed SE 9 mph
Barometer 29.86 in (1011.1 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 14 Apr 4:51 pm EDT
Extended Forecast for

Riverton ME

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 59. Southeast wind around 5 mph.

    High: 59 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 10pm. Patchy fog before 1am, then patchy fog after 3am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 44. Calm wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 44 °F

    Showers
    Likely and
    Patchy Fog
    then Patchy
    Fog

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 5pm. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 57. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 57 °F

    Patchy Fog
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 3am. Cloudy, with a low around 42. Calm wind. Chance of precipitation is 60%.

    Low: 42 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers likely, mainly before 9am. Mostly cloudy, with a high near 60. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 60%.

    High: 60 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Chance
    Showers

  • Friday

    Friday: Showers likely, mainly after 5pm. Mostly cloudy, with a high near 59. Chance of precipitation is 60%.

    High: 59 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Chance
    Showers

  • Saturday

    Saturday: Mostly cloudy, with a high near 53.

    High: 53 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 59. Southeast wind around 5 mph.
Tonight
Showers and thunderstorms likely, mainly before 10pm. Patchy fog before 1am, then patchy fog after 3am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 44. Calm wind. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 5pm. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 57. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers likely, mainly after 3am. Cloudy, with a low around 42. Calm wind. Chance of precipitation is 60%.
Thursday
Showers likely, mainly before 9am. Mostly cloudy, with a high near 60. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 60%.
Thursday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 44.
Friday
Showers likely, mainly after 5pm. Mostly cloudy, with a high near 59. Chance of precipitation is 60%.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 42.
Saturday
Mostly cloudy, with a high near 53.
Saturday Night
Mostly cloudy, with a low around 40.
Sunday
A 50 percent chance of showers. Cloudy, with a high near 56.
Sunday Night
Showers likely. Mostly cloudy, with a low around 35. Chance of precipitation is 60%.
Monday
Partly sunny, with a high near 48.
Monday Night
Partly cloudy, with a low around 27.
Tuesday
Mostly sunny, with a high near 47.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Riverton ME
 43.69°N 70.32°W (Elev. 75 ft)
Last Update:
2:37 pm EDT Apr 14, 2026
Forecast Valid:
5pm EDT Apr 14, 2026-6pm EDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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