Sunapee State Park Weather Forecast

    • 20
    • 37

    Decreasing Clouds

    • 31
    • 40

    Rain

    • 18
    • 51

    Rain

    • 25
    • 30

    Mostly Cloudy

    • 15
    • 36

    Partly Sunny

    • 11
    • 24

    Partly Sunny

Today 17 Dec Merrimack

Partly sunny. Highs in the upper 30s. Southwest Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 17 Dec Merrimack

Mostly clear. Lows around 20. West Winds around 10 Mph with Gusts up to 25 Mph this Evening, becoming light and variable.

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Sunapee State Park Temperature Statistics

December Temperature

Springfield, Hartness State Springfield Airport (23 miles)

  • Lowest 9 December, 2025

    -8 °F

  • Average December

    22 °F

  • Highest 1 December, 2025

    37 °F

Climate (2020–Present)

Springfield, Hartness State Springfield Airport (23 miles)

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  • Average Low 2020–2025

    38.4 °F

  • Average 2020–2025

    48.4 °F

  • Average High 2020–2025

    58.9 °F
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