National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Portland, Portland International Jetport (KPWM)

Lat: 43.64°NLon: 70.3°WElev: 72ft.

Overcast

40°F

4°C

Humidity 86%
Wind Speed SW 3 mph
Barometer 30.44 in (1030.8 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 11 Oct 7:51 am EDT
Extended Forecast for

Thornton Heights ME

Frost Advisory until October 11, 08:00am
Click here for hazard details and duration
...
  •  
    Frost Advisory until October 11, 08:00am

    NOW until 8:00am Sun

    Frost Advisory

  • Today

    High: 61 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Showers, mainly before 5am. Areas of fog after 5am. Low around 44. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 44 °F

    Showers and
    Areas Fog

  • Columbus Day

    Columbus Day: A 30 percent chance of showers before 8am. Cloudy through mid morning, then gradual clearing, with a high near 70. Calm wind becoming northwest around 5 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 70 °F

    Chance
    Showers then
    Sunny

  • Monday Night

    Monday Night: A 30 percent chance of rain after 2am. Increasing clouds, with a low around 41. Northeast wind 5 to 10 mph.

    Low: 41 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday

    Tuesday: Rain, mainly after 8am. High near 59. East wind 10 to 15 mph becoming southeast in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%.

    High: 59 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain before 2am, then showers likely after 2am. Low around 48. Chance of precipitation is 90%.

    Low: 48 °F

    Rain

  • Wednesday

    Wednesday: Showers likely, mainly before 7am. Partly sunny, with a high near 66. Chance of precipitation is 60%.

    High: 66 °F

    Showers
    Likely then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

Detailed Forecast

Today
Increasing clouds, with a high near 61. Light and variable wind becoming south 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
Showers, mainly before 5am. Areas of fog after 5am. Low around 44. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Columbus Day
A 30 percent chance of showers before 8am. Cloudy through mid morning, then gradual clearing, with a high near 70. Calm wind becoming northwest around 5 mph. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A 30 percent chance of rain after 2am. Increasing clouds, with a low around 41. Northeast wind 5 to 10 mph.
Tuesday
Rain, mainly after 8am. High near 59. East wind 10 to 15 mph becoming southeast in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%.
Tuesday Night
Rain before 2am, then showers likely after 2am. Low around 48. Chance of precipitation is 90%.
Wednesday
Showers likely, mainly before 7am. Partly sunny, with a high near 66. Chance of precipitation is 60%.
Wednesday Night
Partly cloudy, with a low around 38.
Thursday
Sunny, with a high near 59.
Thursday Night
Partly cloudy, with a low around 36.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 59.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 40.
Saturday
A 40 percent chance of showers. Partly sunny, with a high near 57. Breezy.
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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:
6:26 am EDT Oct 11, 2026
Forecast Valid:
7am EDT Oct 11, 2026-6pm EDT Oct 17, 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