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.

Fair

44°F

7°C

Humidity 53%
Wind Speed Calm
Barometer 30.10 in (1019.4 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 12 May 11:51 pm EDT
Extended Forecast for

Thornton Heights ME

Frost Advisory May 13, 02:00am until May 13, 09:00am
Click here for hazard details and duration
Frost Advisory

  • Overnight

    Overnight: Areas of frost after 4am. Otherwise, partly cloudy, with a low around 36. Calm wind.

    Low: 36 °F

    Areas Frost

  • Wednesday

    Wednesday: A 50 percent chance of showers, mainly between noon and 5pm. Mostly cloudy, with a high near 57. Light and variable wind becoming south 5 to 10 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.

    High: 57 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers, mainly before 9pm. Cloudy, with a low around 46. South wind 5 to 10 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 46 °F

    Chance
    Showers then
    Cloudy

  • Thursday

    Thursday: Rain, mainly after 10am. High near 58. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 58 °F

    Rain

  • Thursday Night

    Thursday Night: Rain. Low around 44. Northeast wind around 5 mph. Chance of precipitation is 90%.

    Low: 44 °F

    Rain

  • Friday

    Friday: Showers, mainly before 2pm. High near 59. Chance of precipitation is 80%.

    High: 59 °F

    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers before 10pm. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Chance
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

Detailed Forecast

Overnight
Areas of frost after 4am. Otherwise, partly cloudy, with a low around 36. Calm wind.
Wednesday
A 50 percent chance of showers, mainly between noon and 5pm. Mostly cloudy, with a high near 57. Light and variable wind becoming south 5 to 10 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A 30 percent chance of showers, mainly before 9pm. Cloudy, with a low around 46. South wind 5 to 10 mph. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Rain, mainly after 10am. High near 58. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Thursday Night
Rain. Low around 44. Northeast wind around 5 mph. Chance of precipitation is 90%.
Friday
Showers, mainly before 2pm. High near 59. Chance of precipitation is 80%.
Friday Night
A 30 percent chance of showers before 10pm. Mostly cloudy, with a low around 45.
Saturday
Mostly sunny, with a high near 72.
Saturday Night
Mostly clear, with a low around 52.
Sunday
Sunny, with a high near 76.
Sunday Night
Mostly clear, with a low around 48.
Monday
Mostly sunny, with a high near 69.
Monday Night
Partly cloudy, with a low around 50.
Tuesday
A 30 percent chance of showers. Partly sunny, with a high near 76.
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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:
7:55 pm EDT May 12, 2026
Forecast Valid:
12am EDT May 13, 2026-6pm EDT May 19, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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