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

37°F

3°C

Humidity 44%
Wind Speed S 12 G 18 mph
Barometer 29.99 in (1015.5 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 13 Mar 1:51 pm EDT
Extended Forecast for

Thornton Heights ME

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 41. Southwest wind around 5 mph.

    High: 41 °F

    Mostly Cloudy

  • Tonight

    Tonight: Snow before 5am, then a chance of rain and snow. 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 chance of snow before 9am, then a slight chance of rain. Partly sunny, with a high near 46. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 46 °F

    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 22. West wind 5 to 10 mph, with gusts as high as 25 mph.

    Low: 22 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 40. Calm wind becoming southwest around 5 mph.

    High: 40 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

  • Monday

    Monday: Rain, mainly after 7am. High near 52. Chance of precipitation is 100%.

    High: 52 °F

    Rain

  • Monday Night

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

    Low: 38 °F

    Rain

  • Tuesday

    Tuesday: A 50 percent chance of rain before 10am. Partly sunny, with a high near 50.

    High: 50 °F

    Chance Rain
    then Mostly
    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 41. Southwest wind around 5 mph.
Tonight
Snow before 5am, then a chance of rain and snow. Low around 28. South wind around 5 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Saturday
A chance of snow before 9am, then a slight chance of rain. Partly sunny, with a high near 46. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Mostly clear, with a low around 22. West wind 5 to 10 mph, with gusts as high as 25 mph.
Sunday
Partly sunny, with a high near 40. Calm wind becoming southwest around 5 mph.
Sunday Night
Mostly cloudy, with a low around 28.
Monday
Rain, mainly after 7am. High near 52. Chance of precipitation is 100%.
Monday Night
Rain. Low around 38. Chance of precipitation is 100%.
Tuesday
A 50 percent chance of rain before 10am. Partly sunny, with a high near 50.
Tuesday Night
Mostly clear, with a low around 16.
Wednesday
Sunny, with a high near 36.
Wednesday Night
Mostly 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:
1:41 pm EDT Mar 13, 2026
Forecast Valid:
2pm EDT Mar 13, 2026-6pm EDT Mar 19, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation