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

Multiday Heat Wave Forecast For Much of Central/Eastern U.S.

A major summer heat wave is forecast midweek into this coming weekend across much of the central and eastern states and lingering in the southwest. The combination of temperature and humidity will lift the heat index above 100 in many locations with 110 or higher possible in the warmest locations. There will be nearly no relief at night with overnight low temperatures in the upper 70s and 80s. Read More >

Current conditions at

Portland, Portland International Jetport (KPWM)

Lat: 43.64°NLon: 70.3°WElev: 72ft.

A Few Clouds

79°F

26°C

Humidity 49%
Wind Speed S 13 mph
Barometer 30.00 in (1015.7 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 16 Jul 1:51 pm EDT
Extended Forecast for

Portland ME

  • This
    Afternoon

    This Afternoon: Mostly sunny, with a high near 82. South wind around 10 mph.

    Mostly Sunny

    High: 82 °F

  • Tonight

    Tonight: Partly cloudy, with a low around 67. Southwest wind around 5 mph.

    Partly Cloudy

    Low: 67 °F

  • Wednesday

    Wednesday: Scattered showers before noon, then scattered showers and thunderstorms between noon and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 81. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Showers
    Likely

    High: 81 °F

  • Wednesday
    Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 62. West wind around 5 mph becoming north after midnight. Chance of precipitation is 60%.

    Showers
    Likely

    Low: 62 °F

  • Thursday

    Thursday: A 40 percent chance of showers. Partly sunny, with a high near 72. Northeast wind 5 to 10 mph becoming east in the afternoon.

    Chance
    Showers

    High: 72 °F

  • Thursday
    Night

    Thursday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 63.

    Chance
    Showers

    Low: 63 °F

  • Friday

    Friday: Partly sunny, with a high near 77.

    Partly Sunny

    High: 77 °F

  • Friday
    Night

    Friday Night: Partly cloudy, with a low around 70.

    Partly Cloudy

    Low: 70 °F

  • Saturday

    Saturday: A 40 percent chance of showers. Mostly sunny and hot, with a high near 91.

    Chance
    Showers

    High: 91 °F

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 82. South wind around 10 mph.
Tonight
Partly cloudy, with a low around 67. Southwest wind around 5 mph.
Wednesday
Scattered showers before noon, then scattered showers and thunderstorms between noon and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 81. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 62. West wind around 5 mph becoming north after midnight. Chance of precipitation is 60%.
Thursday
A 40 percent chance of showers. Partly sunny, with a high near 72. Northeast wind 5 to 10 mph becoming east in the afternoon.
Thursday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 63.
Friday
Partly sunny, with a high near 77.
Friday Night
Partly cloudy, with a low around 70.
Saturday
A 40 percent chance of showers. Mostly sunny and hot, with a high near 91.
Saturday Night
Partly cloudy, with a low around 71.
Sunday
A 30 percent chance of showers. Mostly sunny, with a high near 85.
Sunday Night
A 30 percent chance of showers. Partly cloudy, with a low around 67.
Monday
A 50 percent chance of showers. Mostly sunny, with a high near 79.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Portland ME
 43.66°N 70.27°W (Elev. 7 ft)
Last Update:
1:14 pm EDT Jul 16, 2019
Forecast Valid:
2pm EDT Jul 16, 2019-6pm EDT Jul 22, 2019
 
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