Chambersburg Weather Forecast

    • 57
    • 84

    Decreasing Clouds

    • 57
    • 80

    Chance Rain Showers

    • 59
    • 74

    Chance Rain Showers

    • 58
    • 84

    Mostly Sunny

    • 54
    • 88

    Mostly Sunny

    • 55
    • 78

    Partly Sunny

Today 15 Sep Franklin

Partly sunny. Highs in the lower 80s. Northeast Winds around 5 Mph.

Tonight 15 Sep Franklin

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the mid 50s. Northeast 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 8 September, 2025

    48.9 °F

  • Average September

    68.7 °F

  • Highest 5 September, 2025

    87.1 °F

Climate (2020–Present)

Hagerstown, Washington County Regional Airport (16.2 miles)

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  • Average Low 2020–2025

    47.8 °F

  • Average 2020–2025

    56.8 °F

  • Average High 2020–2025

    65.9 °F
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