Duncannon Weather Forecast

    • 66
    • 84

    Mostly Cloudy

    • 62
    • 86

    Rain Showers Likely

    • 59
    • 83

    Partly Sunny

    • 62
    • 82

    Partly Sunny

    • 67
    • 85

    Partly Sunny

    • 69
    • 89

    Partly Sunny

Today 26 Aug Perry

Patchy fog this morning. Mostly sunny. Highs in the lower 80s. Northeast Winds around 5 Mph, becoming south around 5 Mph this afternoon.

Tonight 26 Aug Perry

Mostly cloudy. Lows in the mid 60s. South Winds around 5 Mph.

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Duncannon Temperature Statistics

August Temperature

Harrisburg, Capital City Airport (14.9 miles)

  • Lowest 24 August, 2026

    59 °F

  • Average August

    74.8 °F

  • Highest 17 August, 2026

    90 °F

Climate (2021–2026)

Harrisburg, Capital City Airport (14.9 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    56.9 °F

  • Average High 2021–2026

    66.2 °F
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