South Mountain Weather Forecast

    • 61
    • 81

    Mostly Sunny

    • 64
    • 81

    Slight Chance Thunderstorms

    • 53
    • 75

    Slight Chance Rain Showers

    • 58
    • 73

    Slight Chance Thunderstorms

    • 59
    • 74

    Chance Rain Showers

    • 57
    • 72

    Chance Rain Showers

Today 16 Sep Franklin

Patchy fog in the morning. Sunny. Very warm with Highs in the mid 80s. South Winds around 5 Mph.

Tonight 16 Sep Franklin

Partly cloudy in the Evening, then becoming mostly cloudy. Humid with Lows in the mid 60s. South Winds around 5 Mph in the Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Mountain Temperature Statistics

September Temperature

Hagerstown, Washington County Regional Airport (15.5 miles)

  • Lowest 7 September, 2026

    56.6 °F

  • Average September

    75.5 °F

  • Highest 1 September, 2026

    93.7 °F

Climate (2021–2026)

Hagerstown, Washington County Regional Airport (15.5 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    56.9 °F

  • Average High 2021–2026

    66 °F
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