Chambersburg Weather Forecast

    • 50
    • 69

    Rain Showers

    • 49
    • 64

    Chance Rain Showers

    • 47
    • 64

    Partly Sunny

    • 49
    • 68

    Partly Sunny

    • 49
    • 69

    Partly Sunny

    • 50
    • 72

    Partly Sunny

Today 22 Sep Franklin

Showers. Highs in the upper 60s. Northeast Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain near 100 percent.

Tonight 22 Sep Franklin

Showers likely. Lows in the upper 40s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

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Chambersburg Temperature Statistics

September Temperature

Hagerstown, Washington County Regional Airport (16.2 miles)

  • Lowest 15 September, 2026

    50.6 °F

  • Average September

    74 °F

  • Highest 1 September, 2026

    93.7 °F

Climate (2021–2026)

Hagerstown, Washington County Regional Airport (16.2 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    56.8 °F

  • Average High 2021–2026

    66 °F
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