South Mountain State Park Weather Forecast

    • 69
    • 80

    Chance Rain Showers

    • 70
    • 81

    Chance Thunderstorms

    • 64
    • 86

    Chance Thunderstorms

    • 62
    • 80

    Mostly Sunny

    • 65
    • 80

    Partly Sunny

    • 69
    • 84

    Partly Sunny

    • 72
    • 90

    Slight Chance Thunderstorms

Today 18 Jul Washington

Mostly cloudy with scattered Showers and Thunderstorms. Highs in the lower 80s. South Winds around 5 Mph. Chance of rain 50 percent.

Tonight 18 Jul Washington

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms. Patchy fog after midnight. Lows around 70. East Winds around 5 Mph. Chance of rain 30 percent.

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  • Temperature Real-Time

South Mountain State Park Temperature Statistics

July Temperature

Hagerstown, Washington County Regional Airport (12.4 miles)

  • Lowest 5 July, 2025

    63.6 °F

  • Average July

    79.8 °F

  • Highest 7 July, 2025

    94.6 °F

Climate (2020–Present)

Hagerstown, Washington County Regional Airport (12.4 miles)

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  • Average Low 2020–2025

    48 °F

  • Average 2020–2025

    56.9 °F

  • Average High 2020–2025

    65.9 °F
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