Chambersburg Weather Forecast

    • 54
    • 79

    Mostly Sunny

    • 61
    • 84

    Mostly Sunny

    • 67
    • 87

    Chance Rain Showers

    • 62
    • 84

    Chance Rain Showers

    • 66
    • 81

    Slight Chance Thunderstorms

    • 62
    • 84

    Chance Rain Showers

Today 15 Sep Franklin

Sunny. Highs in the upper 70s. East Winds around 5 Mph, becoming south around 5 Mph in the afternoon.

Tonight 15 Sep Franklin

Mostly clear. Lows in the lower 50s. South Winds around 5 Mph.

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  • Temperature Real-Time

Chambersburg Temperature Statistics

September Temperature

Hagerstown, Washington County Regional Airport (16.2 miles)

  • Lowest 7 September, 2026

    56.6 °F

  • Average September

    75.3 °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

    56.9 °F

  • Average High 2021–2026

    66 °F
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