Mercersburg Weather Forecast

    • 2
    • 19

    Partly Sunny

    • 7
    • 21

    Mostly Cloudy

    • 11
    • 24

    Partly Sunny

    • 13
    • 30

    Partly Sunny

    • 16
    • 33

    Partly Sunny

    • 18
    • 31

    Slight Chance Snow Showers

Today 30 Jan Franklin

Mostly sunny. Highs around 20. Northwest Winds around 5 Mph.

Tonight 30 Jan Franklin

Mostly cloudy. Cold with Lows around zero. Northwest Winds around 5 Mph.

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  • Temperature Real-Time

Mercersburg Temperature Statistics

January Temperature

Hagerstown, Washington County Regional Airport (12.4 miles)

  • Lowest 24 January, 2026

    4.6 °F

  • Average January

    32.2 °F

  • Highest 7 January, 2026

    57.7 °F

Climate (2021–Present)

Hagerstown, Washington County Regional Airport (12.4 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    56.7 °F

  • Average High 2021–2026

    65.8 °F
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