Highland Lake Weather Forecast

    • 51
    • 81

    Slight Chance Rain Showers

    • 57
    • 81

    Partly Sunny

    • 65
    • 89

    Partly Sunny

    • 44
    • 80

    Chance Rain Showers

    • 40
    • 62

    Partly Sunny

    • 43
    • 65

    Mostly Cloudy

    • 44
    • 65

    Mostly Cloudy

Today 17 May Merrimack

Partly sunny with a 50 percent chance of Showers. Highs in the upper 70s. West Winds 15 to 20 Mph with Gusts up to 35 Mph.

Tonight 17 May Merrimack

Partly cloudy. Lows in the upper 40s. Northwest Winds 10 to 15 Mph with Gusts up to 30 Mph in the Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Highland Lake Temperature Statistics

May Temperature

Laconia, Laconia Municipal Airport (18.6 miles)

  • Lowest 8 May, 2026

    32 °F

  • Average May

    50.2 °F

  • Highest 5 May, 2026

    82 °F

Climate (2021–Present)

Laconia, Laconia Municipal Airport (18.6 miles)

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  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    48 °F

  • Average High 2021–2026

    56.9 °F
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