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

Harrisburg, Capital City Airport (KCXY)

Lat: 40.22°NLon: 76.86°WElev: 335ft.

Fog/Mist

59°F

15°C

Humidity 100%
Wind Speed Calm
Barometer 30.10 in (1019.1 mb)
Dewpoint 59°F (15°C)
Visibility 1.25 mi
Last update 25 May 6:56 am EDT
Extended Forecast for

Duncannon PA

  • Memorial Day

    Memorial Day: A chance of showers before 11am, then isolated showers after 2pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 78. Calm wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    High: 78 °F

    Chance
    Showers and
    Patchy Fog
    then Isolated
    Showers

  • Tonight

    Tonight: Patchy fog before 1am, then areas of fog after 3am. Otherwise, mostly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Mostly Cloudy
    then Areas
    Fog

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, partly sunny, with a high near 81. Calm wind.

    High: 81 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 61. Calm wind.

    Low: 61 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: Areas of fog before 9am. Otherwise, partly sunny, with a high near 83. Calm wind becoming west around 5 mph in the afternoon.

    High: 83 °F

    Areas Fog
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 60.

    Low: 60 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

Detailed Forecast

Memorial Day
A chance of showers before 11am, then isolated showers after 2pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 78. Calm wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Patchy fog before 1am, then areas of fog after 3am. Otherwise, mostly cloudy, with a low around 58. Calm wind.
Tuesday
Patchy fog before 8am. Otherwise, partly sunny, with a high near 81. Calm wind.
Tuesday Night
Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 61. Calm wind.
Wednesday
Areas of fog before 9am. Otherwise, partly sunny, with a high near 83. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 60.
Thursday
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 52.
Friday
Sunny, with a high near 76.
Friday Night
Partly cloudy, with a low around 53.
Saturday
Mostly sunny, with a high near 74.
Saturday Night
Partly cloudy, with a low around 51.
Sunday
Mostly sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Duncannon PA
 40.4°N 77.02°W (Elev. 413 ft)
Last Update:
6:36 am EDT May 25, 2026
Forecast Valid:
7am EDT May 25, 2026-6pm EDT May 31, 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