South Hero Weather Forecast

    • 55
    • 77

    Mostly Sunny

    • 57
    • 78

    Partly Sunny

    • 56
    • 81

    Partly Sunny

    • 43
    • 68

    Mostly Sunny

    • 46
    • 66

    Mostly Sunny

    • 56
    • 75

    Partly Sunny

Today 16 Sep Grand Isle

Sunny. Highs in the mid 70s. Light and variable Winds.

Tonight 16 Sep Grand Isle

Clear until Midnight, then becoming partly cloudy. Lows in the upper 50s. Light and variable Winds.

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South Hero Temperature Statistics

September Temperature

Plattsburgh International Airport (6.8 miles)

  • Lowest 9 September, 2025

    43 °F

  • Average September

    61.8 °F

  • Highest 4 September, 2025

    82.9 °F

Climate (2020–Present)

Plattsburgh International Airport (6.8 miles)

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  • Average Low 2020–2025

    38.5 °F

  • Average 2020–2025

    47.7 °F

  • Average High 2020–2025

    56.2 °F
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