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

Hurricane Isaias Approaching the Gulf Coast; Remnants of Rachel to Impact the Southwest U.S.

Hurricane Isaias is expected to make landfall along the U.S. northern Gulf Coast late Friday or early Saturday. A life-threatening storm surge is expected along the coast with damaging wind gusts extending well inland. Areas of heavy rainfall are forecast throughout much of the Southeast U.S. The remnants of Rachel will bring gusty winds and heavy rainfall to the Southwest U.S. this weekend. Read More >

Current conditions at

Harrisburg, Capital City Airport (KCXY)

Lat: 40.22°NLon: 76.86°WElev: 335ft.

Fair

56°F

13°C

Humidity 65%
Wind Speed W 5 mph
Barometer 30.07 in (1018.2 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 8 Oct 9:56 pm EDT
Extended Forecast for

Duncannon PA

  • Tonight

    Tonight: Clear, with a low around 48. Calm wind.

    Low: 48 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 71. Calm wind becoming northwest 5 to 7 mph in the afternoon.

    High: 71 °F

    Sunny

  • Friday Night

    Friday Night: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 48. Calm wind.

    Low: 48 °F

    Partly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, partly sunny, with a high near 71. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 71 °F

    Patchy Fog
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 55. Light southeast wind.

    Low: 55 °F

    Mostly Cloudy

  • Sunday

    Sunday: Rain. High near 64. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 64 °F

    Rain

  • Sunday Night

    Sunday Night: Rain before 8pm, then showers, mainly between 8pm and 2am. Low around 59. Chance of precipitation is 80%.

    Low: 59 °F

    Rain

  • Columbus Day

    Columbus Day: A chance of showers before 8am. Mostly cloudy, with a high near 72. Chance of precipitation is 30%.

    High: 72 °F

    Chance
    Showers then
    Mostly Cloudy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 48. Calm wind.
Friday
Sunny, with a high near 71. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Friday Night
Patchy fog after 3am. Otherwise, partly cloudy, with a low around 48. Calm wind.
Saturday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 71. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 55. Light southeast wind.
Sunday
Rain. High near 64. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Rain before 8pm, then showers, mainly between 8pm and 2am. Low around 59. Chance of precipitation is 80%.
Columbus Day
A chance of showers before 8am. Mostly cloudy, with a high near 72. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
Mostly cloudy, with a low around 53.
Wednesday
Mostly sunny, with a high near 66.
Wednesday Night
Partly cloudy, with a low around 48.
Thursday
Mostly sunny, with a high near 65.
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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:
8:11 pm EDT Oct 8, 2026
Forecast Valid:
10pm EDT Oct 8, 2026-6pm EDT Oct 15, 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