Lake Sunapee Weather Forecast

    • 57
    • 79

    Increasing Clouds

    • 62
    • 82

    Partly Sunny

    • 68
    • 82

    Chance Rain Showers

    • 66
    • 83

    Slight Chance Thunderstorms

    • 65
    • 81

    Chance Thunderstorms

    • 66
    • 82

    Mostly Sunny

Today 4 Aug Sullivan

Sunny. Highs around 80. West Winds around 10 Mph.

Tonight 4 Aug Sullivan

Mostly clear. Lows in the upper 50s. Light and variable Winds.

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  • Temperature Real-Time

Lake Sunapee Temperature Statistics

August Temperature

Lebanon Municipal Airport (21.1 miles)

  • Lowest 1 August, 2026

    61 °F

  • Average August

    72.5 °F

  • Highest 1 August, 2026

    86 °F

Climate (2021–2026)

Lebanon Municipal Airport (21.1 miles)

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  • Average Low 2021–2026

    37.9 °F

  • Average 2021–2026

    48.8 °F

  • Average High 2021–2026

    59.7 °F
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