Alton Bay Weather Forecast

    • 43
    • 67

    Mostly Sunny

    • 43
    • 64

    Chance Rain Showers

    • 43
    • 53

    Chance Rain Showers

    • 47
    • 63

    Chance Rain Showers

    • 51
    • 74

    Slight Chance Rain Showers

    • 49
    • 74

    Mostly Sunny

Today 22 May Belknap

Mostly sunny. Highs in the upper 60s. Light and variable Winds.

Tonight 22 May Belknap

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

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Alton Bay Temperature Statistics

May Temperature

Laconia, Laconia Municipal Airport (11.2 miles)

  • Lowest 8 May, 2026

    32 °F

  • Average May

    54 °F

  • Highest 19 May, 2026

    89.1 °F

Climate (2021–Present)

Laconia, Laconia Municipal Airport (11.2 miles)

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  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    48.1 °F

  • Average High 2021–2026

    56.9 °F
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