Chambersburg Weather Forecast

    • 56
    • 79

    Partly Sunny

    • 57
    • 82

    Partly Sunny

    • 66
    • 85

    Slight Chance Thunderstorms

    • 66
    • 86

    Rain Showers Likely

    • 62
    • 85

    Mostly Sunny

    • 63
    • 84

    Partly Sunny

    • 67
    • 86

    Mostly Cloudy

Today 24 Aug Franklin

Mostly sunny. Highs in the upper 70s. West Winds 5 to 10 Mph.

Tonight 24 Aug Franklin

Mostly clear. Lows in the mid 50s. West Winds around 5 Mph.

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Chambersburg Temperature Statistics

August Temperature

Hagerstown, Washington County Regional Airport (16.2 miles)

  • Lowest 21 August, 2026

    58.6 °F

  • Average August

    76.8 °F

  • Highest 6 August, 2026

    91.7 °F

Climate (2021–2026)

Hagerstown, Washington County Regional Airport (16.2 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    56.8 °F

  • Average High 2021–2026

    66 °F
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