Squam Lake Weather Forecast

    • 43
    • 67

    Mostly Sunny

    • 51
    • 67

    Partly Sunny

    • 59
    • 77

    Partly Sunny

    • 60
    • 73

    Rain Showers Likely

    • 51
    • 72

    Partly Sunny

    • 53
    • 67

    Chance Rain Showers

    • 50
    • 65

    Slight Chance Rain Showers

Today 14 Sep Belknap

Sunny. Highs in the upper 60s. Northwest Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 14 Sep Belknap

Clear. Patchy fog after midnight. Lows in the mid 40s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph in the Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Squam Lake Temperature Statistics

September Temperature

Plymouth Municipal Airport (11.2 miles)

  • Lowest 12 September, 2026

    37.9 °F

  • Average September

    62.2 °F

  • Highest 10 September, 2026

    80.1 °F

Climate (2021–2026)

Plymouth Municipal Airport (11.2 miles)

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  • Average Low 2021–2026

    36.2 °F

  • Average 2021–2026

    46.3 °F

  • Average High 2021–2026

    57 °F
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