Highland Lake Weather Forecast

    • 49
    • 78

    Mostly Sunny

    • 49
    • 79

    Mostly Sunny

    • 52
    • 78

    Mostly Cloudy

    • 55
    • 82

    Mostly Sunny

    • 40
    • 73

    Mostly Sunny

    • 38
    • 68

    Mostly Sunny

Today 15 Sep Merrimack

Patchy fog this morning. Mostly sunny. Highs in the upper 70s. Light and variable Winds.

Tonight 15 Sep Merrimack

Mostly clear. Patchy fog after midnight. Lows around 50. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Highland Lake Temperature Statistics

September Temperature

Laconia, Laconia Municipal Airport (18.6 miles)

  • Lowest 10 September, 2025

    44.1 °F

  • Average September

    63.2 °F

  • Highest 3 September, 2025

    80.1 °F

Climate (2020–Present)

Laconia, Laconia Municipal Airport (18.6 miles)

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  • Average Low 2020–2025

    39.4 °F

  • Average 2020–2025

    48.4 °F

  • Average High 2020–2025

    57.3 °F
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