Chambersburg Weather Forecast

    • 32
    • 43

    Chance Rain/Snow

    • 37
    • 50

    Mostly Cloudy

    • 36
    • 48

    Chance Rain Showers

    • 44
    • 51

    Chance Rain Showers

    • 40
    • 61

    Chance Rain Showers

    • 36
    • 51

    Chance Rain Showers

Today 22 Dec Franklin

Sunny in the Morning, then becoming partly sunny. Highs in the lower 40s. Southwest Winds around 5 Mph.

Tonight 22 Dec Franklin

Clear, cooler. Near steady temperature in the lower 20s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chambersburg Temperature Statistics

December Temperature

Hagerstown, Washington County Regional Airport (16.2 miles)

  • Lowest 16 December, 2025

    12.9 °F

  • Average December

    32.4 °F

  • Highest 19 December, 2025

    57.9 °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

    65.8 °F
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