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

Hazardous Weather Conditions

Current conditions at

Harrisburg, Harrisburg International Airport (KMDT)

Lat: 40.19°NLon: 76.76°WElev: 312ft.

Mostly Cloudy

75°F

24°C

Humidity 90%
Wind Speed Calm
Barometer 30.04 in (1017.2 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 2 Sep 8:56 pm EDT
Extended Forecast for

Lawn PA

Heat Advisory September 3, 11:00am until September 3, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: A chance of showers and thunderstorms. Some of the storms could be severe. Mostly cloudy, with a low around 71. South wind 5 to 8 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 71 °F

    Severe
    Thunderstorms

  • Thursday

    Thursday: A slight chance of showers and thunderstorms, then a chance of showers after 8am. Mostly cloudy, with a high near 90. South wind 5 to 10 mph becoming west in the afternoon. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 90 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers, mainly before 2am. Mostly cloudy, with a low around 72. West wind 3 to 7 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 72 °F

    Chance
    Showers

  • Friday

    Friday: A slight chance of showers before 8am, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 86. Northwest wind 6 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.

    High: 86 °F

    Partly Sunny
    then Showers
    Likely

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 64. Northwest wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Showers
    Likely then
    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Some of the storms could be severe. Mostly cloudy, with a low around 71. South wind 5 to 8 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
A slight chance of showers and thunderstorms, then a chance of showers after 8am. Mostly cloudy, with a high near 90. South wind 5 to 10 mph becoming west in the afternoon. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers, mainly before 2am. Mostly cloudy, with a low around 72. West wind 3 to 7 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A slight chance of showers before 8am, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 86. Northwest wind 6 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.
Friday Night
Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 64. Northwest wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Sunny, with a high near 81.
Saturday Night
Mostly clear, with a low around 58.
Sunday
Sunny, with a high near 77.
Sunday Night
Partly cloudy, with a low around 58.
Labor Day
Sunny, with a high near 79.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Mostly sunny, with a high near 82.
Tuesday Night
Partly cloudy, with a low around 62.
Wednesday
Mostly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lawn PA
 40.22°N 76.53°W (Elev. 604 ft)
Last Update:
8:10 pm EDT Sep 2, 2026
Forecast Valid:
9pm EDT Sep 2, 2026-6pm EDT Sep 9, 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