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

24°F

-4°C

Humidity 62%
Wind Speed W 6 mph
Barometer 29.94 in (1014.0 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 13 Mar 5:51 am EDT
Extended Forecast for

Thornton Heights ME

  • Today

    Today: Increasing clouds, with a high near 41. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 41 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Snow before 5am, then snow, possibly mixed with rain. Low around 28. South wind around 5 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 28 °F

    Chance Snow
    then
    Rain/Snow

  • Saturday

    Saturday: A slight chance of rain before 2pm, then a slight chance of showers after 2pm. Partly sunny, with a high near 46. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 46 °F

    Slight Chance
    Rain

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 21. West wind around 5 mph.

    Low: 21 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 40. Calm wind becoming south around 5 mph in the afternoon.

    High: 40 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of rain after 5am. Cloudy, with a low around 28.

    Low: 28 °F

    Cloudy then
    Chance Rain

  • Monday

    Monday: Rain, mainly after 8am. High near 52. Chance of precipitation is 100%.

    High: 52 °F

    Rain

  • Monday Night

    Monday Night: Rain. Low around 38. Breezy. Chance of precipitation is 100%.

    Low: 38 °F

    Rain and
    Breezy

  • Tuesday

    Tuesday: Rain likely, mainly before 9am. Partly sunny, with a high near 50. Chance of precipitation is 60%.

    High: 50 °F

    Rain Likely

Detailed Forecast

Today
Increasing clouds, with a high near 41. Calm wind becoming southwest around 5 mph in the afternoon.
Tonight
Snow before 5am, then snow, possibly mixed with rain. Low around 28. South wind around 5 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Saturday
A slight chance of rain before 2pm, then a slight chance of showers after 2pm. Partly sunny, with a high near 46. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 21. West wind around 5 mph.
Sunday
Partly sunny, with a high near 40. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
A 30 percent chance of rain after 5am. Cloudy, with a low around 28.
Monday
Rain, mainly after 8am. High near 52. Chance of precipitation is 100%.
Monday Night
Rain. Low around 38. Breezy. Chance of precipitation is 100%.
Tuesday
Rain likely, mainly before 9am. Partly sunny, with a high near 50. Chance of precipitation is 60%.
Tuesday Night
Mostly clear, with a low around 16.
Wednesday
Sunny, with a high near 36.
Wednesday Night
Partly cloudy, with a low around 19.
Thursday
Mostly cloudy, with a high near 40.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Thornton Heights ME
 43.63°N 70.31°W (Elev. 59 ft)
Last Update:
2:36 am EDT Mar 13, 2026
Forecast Valid:
6am EDT Mar 13, 2026-6pm EDT Mar 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation