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

Critical Fire Weather in the Plains; Severe Thunderstorms in the Upper Mississippi Valley and Great Lakes

Anomalously warm, dry and breezy conditions will bring elevated to critical fire weather conditions across portions of the Intermountain West into the central and southern Plains today. Strong to severe thunderstorms are possible across portions of the upper Mississippi River Valley to the Great Lakes tonight through the day Tuesday. Damaging gusts, hail, and heavy rainfall are likely. Read More >

Current conditions at

Harrisburg, Harrisburg International Airport (KMDT)

Lat: 40.19°NLon: 76.76°WElev: 312ft.

Overcast

66°F

19°C

Humidity 47%
Wind Speed SW 13 G 23 mph
Barometer 30.09 in (1019.0 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 30 Mar 3:56 pm EDT
Extended Forecast for

Hummelstown PA

  • This Afternoon

    This Afternoon: A slight chance of showers. Partly sunny, with a high near 69. Southwest wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    High: 69 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A chance of showers, mainly after 4am. Mostly cloudy, with a low around 56. Southwest wind around 8 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 56 °F

    Mostly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 5pm. Mostly sunny, with a high near 78. Southwest wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 61. Southwest wind 8 to 10 mph. Chance of precipitation is 30%.

    Low: 61 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 75. West wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 75 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 54. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 54 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers. Mostly cloudy, with a high near 69. Chance of precipitation is 40%.

    High: 69 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of showers after 2pm. Mostly cloudy, with a high near 77. Chance of precipitation is 30%.

    High: 77 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

This Afternoon
A slight chance of showers. Partly sunny, with a high near 69. Southwest wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Tonight
A chance of showers, mainly after 4am. Mostly cloudy, with a low around 56. Southwest wind around 8 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
A chance of showers, with thunderstorms also possible after 5pm. Mostly sunny, with a high near 78. Southwest wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A slight chance of showers between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 61. Southwest wind 8 to 10 mph. Chance of precipitation is 30%.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 75. West wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. 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 2am, then a chance of showers. Mostly cloudy, with a low around 54. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers. Mostly cloudy, with a high near 69. Chance of precipitation is 40%.
Thursday Night
Mostly cloudy, with a low around 54.
Friday
A chance of showers after 2pm. Mostly cloudy, with a high near 77. Chance of precipitation is 30%.
Friday Night
A chance of showers before 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 30%.
Saturday
A chance of showers. Partly sunny, with a high near 80. Chance of precipitation is 50%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 59. Chance of precipitation is 50%.
Sunday
Showers likely. Mostly cloudy, with a high near 73. Chance of precipitation is 60%.
Sunday Night
Showers likely. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.
Monday
A chance of showers. Mostly sunny, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hummelstown PA
 40.26°N 76.7°W (Elev. 427 ft)
Last Update:
2:21 pm EDT Mar 30, 2026
Forecast Valid:
4pm EDT Mar 30, 2026-6pm EDT Apr 6, 2026
 
Forecast Discussion
 
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Additional Resources

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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