Alton Bay SPB Weather Forecast

    • 63
    • 77

    Rain Showers

    • 59
    • 82

    Chance Thunderstorms

    • 57
    • 78

    Mostly Sunny

    • 60
    • 82

    Mostly Sunny

    • 62
    • 85

    Mostly Sunny

    • 64
    • 86

    Chance Rain Showers

Today 21 Jul Belknap

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms in the afternoon. Highs in the mid 70s. South Winds around 10 Mph with Gusts up to 25 Mph. Chance of rain 40 percent.

Tonight 21 Jul Belknap

A chance of Thunderstorms. Showers, mainly in the evening. Some Thunderstorms may produce heavy rainfall. Lows in the lower 60s. Southeast Winds around 10 Mph with Gusts up to 20 Mph in the Evening, becoming light and variable. Chance of rain near 100 percent.

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Alton Bay SPB Temperature Statistics

July Temperature

Laconia, Laconia Municipal Airport (10.6 miles)

  • Lowest 12 July, 2026

    55.9 °F

  • Average July

    74.1 °F

  • Highest 2 July, 2026

    93 °F

Climate (2021–2026)

Laconia, Laconia Municipal Airport (10.6 miles)

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  • Average Low 2021–2026

    39 °F

  • Average 2021–2026

    48.1 °F

  • Average High 2021–2026

    57 °F
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