Antietam Weather Forecast

    • 65
    • 79

    Mostly Cloudy

    • 66
    • 76

    Mostly Cloudy

    • 65
    • 83

    Slight Chance Thunderstorms

    • 64
    • 83

    Slight Chance Rain Showers

    • 65
    • 86

    Partly Sunny

    • 67
    • 88

    Slight Chance Thunderstorms

Today 18 Aug Washington

Mostly cloudy. A slight chance of Showers in the afternoon. Highs in the upper 70s. Northeast Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 18 Aug Washington

Mostly cloudy. Lows in the upper 60s. North Winds 5 to 10 Mph.

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Antietam Temperature Statistics

August Temperature

Eastern WV Regional Airport/Shepherd Field (12.4 miles)

  • Lowest 3 August, 2025

    53.7 °F

  • Average August

    72.9 °F

  • Highest 12 August, 2025

    90.6 °F

Climate (2020–Present)

Eastern WV Regional Airport/Shepherd Field (12.4 miles)

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  • Average Low 2020–2025

    44.8 °F

  • Average 2020–2025

    55.1 °F

  • Average High 2020–2025

    65.7 °F
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