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.

Partly Cloudy

30°C

86°F

Humidity 70%
Wind Speed S 11 km/h
Barometer 1015.2 mb (29.99 in)
Dewpoint 24°C (75°F)
Visibility 16 km
Heat Index35°C (95°F)
Last update 13 Jul 4:56 pm EDT
Extended Forecast for

Hallam PA

Flood Watch until July 14, 01:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until July 14, 01:00am

    NOW until 1:00am Mon

    Flood Watch

  • This Afternoon

    High: 29 °C

    Slight Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 2am. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 23. South wind 5 to 10 km/h. Chance of precipitation is 60%. New rainfall amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.

    Low: 23 °C

    T-storms
    Likely and
    Patchy Fog

  • Monday

    Monday: Showers and thunderstorms. Patchy fog before 8am. High near 30. South wind 5 to 8 km/h. Chance of precipitation is 80%. New rainfall amounts between 7.5 mm and 1 cm possible.

    High: 30 °C

    Chance
    Showers and
    Patchy Fog
    then T-storms

  • Monday Night

    Monday Night: Showers and thunderstorms before 5am, then a chance of showers. Low around 22. Calm wind. Chance of precipitation is 80%. New rainfall amounts between 5 and 7.5 mm possible.

    Low: 22 °C

    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 30. Calm wind. Chance of precipitation is 60%. New rainfall amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.

    High: 30 °C

    Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms between 8pm and 11pm, then a slight chance of showers after 11pm. Mostly cloudy, with a low around 22. Chance of precipitation is 60%. New precipitation amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.

    Low: 22 °C

    Showers
    Likely then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 31. Chance of precipitation is 60%.

    High: 31 °C

    Partly Sunny
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 23. Chance of precipitation is 60%.

    Low: 23 °C

    Showers
    Likely then
    Chance
    T-storms

Detailed Forecast

This Afternoon
A slight chance of showers and thunderstorms. Partly sunny, with a high near 29. South wind around 13 km/h. Chance of precipitation is 20%.
Tonight
Showers and thunderstorms likely, mainly before 2am. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 23. South wind 5 to 10 km/h. Chance of precipitation is 60%. New rainfall amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.
Monday
Showers and thunderstorms. Patchy fog before 8am. High near 30. South wind 5 to 8 km/h. Chance of precipitation is 80%. New rainfall amounts between 7.5 mm and 1 cm possible.
Monday Night
Showers and thunderstorms before 5am, then a chance of showers. Low around 22. Calm wind. Chance of precipitation is 80%. New rainfall amounts between 5 and 7.5 mm possible.
Tuesday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 30. Calm wind. Chance of precipitation is 60%. New rainfall amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.
Tuesday Night
Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers and thunderstorms between 8pm and 11pm, then a slight chance of showers after 11pm. Mostly cloudy, with a low around 22. Chance of precipitation is 60%. New precipitation amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.
Wednesday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 31. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 23. Chance of precipitation is 60%.
Thursday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 32. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 24. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 32. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 22. Chance of precipitation is 30%.
Saturday
A chance of showers. Mostly sunny, with a high near 31. Chance of precipitation is 40%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 21. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 30.
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ABOUT THIS FORECAST

 
Point Forecast:
Hallam PA
 40.02°N 76.6°W (Elev. 522 m)
Last Update:
4:34 pm EDT Jul 13, 2025
Forecast Valid:
5pm EDT Jul 13, 2025-6pm EDT Jul 20, 2025
 
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