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

Heat Wave and Severe Thunderstorms this Independence Day

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Midwest, and Mid-Atlantic. Numerous temperature records are expected. Clusters of severe thunderstorms will move across parts of the Allegheny Plateau into Mid Atlantic this Independence Day, with potential for widespread damaging winds. Additional severe thunderstorms in the Great Plains. Read More >

Current conditions at

Harrisburg, Capital City Airport (KCXY)

Lat: 40.22°NLon: 76.86°WElev: 335ft.

Fair

74°F

23°C

Humidity 85%
Wind Speed Calm
Barometer 29.93 in (1013.2 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 5 Jul 12:56 am EDT
Extended Forecast for

3 Miles WSW Mechanicsburg PA

  • Overnight

    Overnight: A slight chance of showers and thunderstorms before 2am. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 70. Calm wind. Chance of precipitation is 20%.

    Low: 70 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly between 3pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 89. Light and variable wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 89 °F

    Slight Chance
    Showers then
    T-storms
    Likely

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 3am, then showers likely and possibly a thunderstorm after 3am. Low around 66. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Low: 66 °F

    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 78. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 78 °F

    Showers then
    T-storms

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 63. East wind 3 to 6 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 63 °F

    T-storms then
    Showers

  • Tuesday

    Tuesday: Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 79. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Showers
    Likely then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of thunderstorms before 8pm. Mostly cloudy, with a low around 63. Chance of precipitation is 30%.

    Low: 63 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

Detailed Forecast

Overnight
A slight chance of showers and thunderstorms before 2am. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 70. Calm wind. Chance of precipitation is 20%.
Sunday
Showers and thunderstorms likely, mainly between 3pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 89. Light and variable wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 3am, then showers likely and possibly a thunderstorm after 3am. Low around 66. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Monday
Showers and possibly a thunderstorm. High near 78. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers and possibly a thunderstorm. Low around 63. East wind 3 to 6 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 79. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A chance of thunderstorms before 8pm. Mostly cloudy, with a low around 63. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 65.
Thursday
Mostly sunny, with a high near 88.
Thursday Night
Partly cloudy, with a low around 68.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 88. Chance of precipitation is 60%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Mechanicsburg PA
 40.21°N 77.06°W (Elev. 440 ft)
Last Update:
9:53 pm EDT Jul 4, 2026
Forecast Valid:
1am EDT Jul 5, 2026-6pm EDT Jul 11, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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