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.

Fair

75°F

24°C

Humidity 66%
Wind Speed N 3 mph
Barometer 30.12 in (1019.6 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 17 May 11:56 pm EDT
Extended Forecast for

Duncannon PA

  • Overnight

    Overnight: Mostly clear, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 95. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 95 °F

    Hot

  • Monday Night

    Monday Night: Partly cloudy, with a low around 67. Light south wind.

    Low: 67 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 96. Calm wind becoming southwest 5 to 9 mph in the afternoon.

    High: 96 °F

    Hot

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 70. Southwest wind around 5 mph becoming calm in the evening.

    Low: 70 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 89. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 89 °F

    Chance
    Showers then
    Showers

  • Wednesday Night

    Wednesday Night: Showers before 8pm. Low around 52. Chance of precipitation is 80%.

    Low: 52 °F

    Showers then
    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers after 2pm. Partly sunny, with a high near 68. Chance of precipitation is 30%.

    High: 68 °F

    Partly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers before 8pm. Mostly cloudy, with a low around 50. Chance of precipitation is 30%.

    Low: 50 °F

    Chance
    Showers then
    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 63. Calm wind.
Monday
Sunny and hot, with a high near 95. Calm wind becoming southwest around 6 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 67. Light south wind.
Tuesday
Mostly sunny and hot, with a high near 96. Calm wind becoming southwest 5 to 9 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 70. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 89. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers before 8pm. Low around 52. Chance of precipitation is 80%.
Thursday
A chance of showers after 2pm. Partly sunny, with a high near 68. Chance of precipitation is 30%.
Thursday Night
A chance of showers before 8pm. Mostly cloudy, with a low around 50. Chance of precipitation is 30%.
Friday
A chance of showers after 8am. Mostly cloudy, with a high near 66. Chance of precipitation is 50%.
Friday Night
Showers. Low around 51. Chance of precipitation is 80%.
Saturday
Showers. High near 69. Chance of precipitation is 80%.
Saturday Night
Showers likely. Cloudy, with a low around 56. Chance of precipitation is 70%.
Sunday
Showers likely. Mostly cloudy, with a high near 73. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Duncannon PA
 40.4°N 77.02°W (Elev. 413 ft)
Last Update:
2:05 am EDT May 18, 2026
Forecast Valid:
2am EDT May 18, 2026-6pm EDT May 24, 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