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.

Fog/Mist

48°F

9°C

Humidity 100%
Wind Speed Calm
Barometer 29.93 in (1013.5 mb)
Dewpoint 48°F (9°C)
Visibility 6.00 mi
Last update 14 May 12:51 am EDT
Extended Forecast for

Riverton ME

  • Overnight

    Overnight: Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 45. South wind around 5 mph.

    Low: 45 °F

    Patchy Fog

  • Thursday

    Thursday: Rain, with thunderstorms also possible after 5pm. Patchy fog before 10am. High near 59. East wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 59 °F

    Chance Rain
    and Patchy
    Fog then Rain

  • Thursday Night

    Thursday Night: Rain and possibly a thunderstorm. Patchy fog. Low around 45. Northeast wind around 5 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

    Low: 45 °F

    Rain and
    Patchy Fog

  • Friday

    Friday: Rain before 2pm, then showers likely, mainly between 2pm and 3pm. High near 57. Northeast wind around 5 mph. Chance of precipitation is 90%.

    High: 57 °F

    Rain

  • Friday Night

    Friday Night: Partly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Overnight
Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 45. South wind around 5 mph.
Thursday
Rain, with thunderstorms also possible after 5pm. Patchy fog before 10am. High near 59. East wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Rain and possibly a thunderstorm. Patchy fog. Low around 45. Northeast wind around 5 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Friday
Rain before 2pm, then showers likely, mainly between 2pm and 3pm. High near 57. Northeast wind around 5 mph. Chance of precipitation is 90%.
Friday Night
Partly cloudy, with a low around 44. Calm wind.
Saturday
Sunny, with a high near 74.
Saturday Night
Mostly clear, with a low around 53.
Sunday
Mostly sunny, with a high near 74.
Sunday Night
Mostly clear, with a low around 49.
Monday
Mostly sunny, with a high near 66.
Monday Night
Partly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Partly cloudy, with a low around 57.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
Riverton ME
 43.69°N 70.32°W (Elev. 75 ft)
Last Update:
8:01 pm EDT May 13, 2026
Forecast Valid:
1am EDT May 14, 2026-6pm EDT May 20, 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