Sunapee State Park Weather Forecast

    • 40
    • 60

    Decreasing Clouds

    • 39
    • 60

    Mostly Sunny

    • 45
    • 61

    Partly Sunny

    • 47
    • 60

    Chance Rain Showers

    • 47
    • 58

    Chance Rain Showers

    • 47
    • 60

    Chance Rain Showers

Today 22 Sep Merrimack

Partly sunny. Highs in the lower 60s. Light and variable Winds.

Tonight 22 Sep Merrimack

Partly cloudy. Patchy fog. Lows in the lower 40s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sunapee State Park Temperature Statistics

September Temperature

Springfield, Hartness State Springfield Airport (23 miles)

  • Lowest 15 September, 2026

    40.6 °F

  • Average September

    62.1 °F

  • Highest 10 September, 2026

    81.6 °F

Climate (2021–2026)

Springfield, Hartness State Springfield Airport (23 miles)

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  • Average Low 2021–2026

    38.2 °F

  • Average 2021–2026

    48.6 °F

  • Average High 2021–2026

    59.2 °F
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