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

Hazardous Weather Conditions

Current conditions at

Harrisburg, Capital City Airport (KCXY)

Lat: 40.22°NLon: 76.86°WElev: 335ft.

Overcast

68°F

20°C

Humidity 81%
Wind Speed E 5 mph
Barometer 29.95 in (1014.1 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 26 Jul 4:56 am EDT
Extended Forecast for

Duncannon PA

  • Today

    Today: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84. Calm wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Partly Sunny
    then Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 63. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: A slight chance of showers and thunderstorms before 3pm, then a slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 87. Light and variable wind. Chance of precipitation is 20%.

    High: 87 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely after 2am. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely, then showers and possibly a thunderstorm after 8am. High near 80. South wind 3 to 6 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 80 °F

    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 64 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 80. Chance of precipitation is 60%.

    High: 80 °F

    Partly Sunny
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 62. Chance of precipitation is 60%.

    Low: 62 °F

    Showers
    Likely then
    Partly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 80. Chance of precipitation is 30%.

    High: 80 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84. Calm wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 63. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A slight chance of showers and thunderstorms before 3pm, then a slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 87. Light and variable wind. Chance of precipitation is 20%.
Monday Night
A chance of showers and thunderstorms, then showers likely after 2am. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
Showers likely, then showers and possibly a thunderstorm after 8am. High near 80. South wind 3 to 6 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 80. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 62. Chance of precipitation is 60%.
Thursday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 80. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 62. Chance of precipitation is 30%.
Friday
Sunny, with a high near 83.
Friday Night
Partly cloudy, with a low around 65.
Saturday
A chance of showers. Mostly sunny, with a high near 84. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Duncannon PA
 40.4°N 77.02°W (Elev. 413 ft)
Last Update:
2:21 am EDT Jul 26, 2026
Forecast Valid:
5am EDT Jul 26, 2026-6pm EDT Aug 1, 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