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

71°F

22°C

Humidity 76%
Wind Speed S 10 mph
Barometer 30.03 in (1016.9 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 27 Jun 2:51 pm EDT
Extended Forecast for

Thornton Heights ME

  • Tonight

    Tonight: Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 56. South wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Patchy Fog

  • Sunday

    Sunday: Partly sunny, with a high near 75. Calm wind becoming south around 5 mph in the afternoon.

    High: 75 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Partly Cloudy

  • Monday

    Monday: Mostly cloudy through mid morning, then becoming sunny, with a high near 85. Calm wind becoming south around 5 mph in the afternoon.

    High: 85 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 60. South wind around 5 mph becoming calm.

    Low: 60 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely before 2am, then a chance of showers between 2am and 5am. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.

    Low: 64 °F

    Showers
    Likely then
    Chance
    T-storms

  • Wednesday

    Wednesday: Partly sunny and hot, with a high near 93.

    High: 93 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 56. South wind around 5 mph becoming calm in the evening.
Sunday
Partly sunny, with a high near 75. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 57. Calm wind.
Monday
Mostly cloudy through mid morning, then becoming sunny, with a high near 85. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 60. South wind around 5 mph becoming calm.
Tuesday
Mostly sunny, with a high near 86.
Tuesday Night
Showers and thunderstorms likely before 2am, then a chance of showers between 2am and 5am. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
Wednesday
Partly sunny and hot, with a high near 93.
Wednesday Night
Partly cloudy, with a low around 69.
Thursday
Mostly sunny and hot, with a high near 99.
Thursday Night
Mostly clear, with a low around 69.
Friday
Mostly sunny and hot, with a high near 95.
Friday Night
Partly cloudy, with a low around 65.
Independence Day
A 30 percent chance of showers. Partly sunny, with a high near 88.
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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:
2:28 pm EDT Jun 27, 2026
Forecast Valid:
3pm EDT Jun 27, 2026-6pm EDT Jul 4, 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