William H Thomas State Forest Weather Forecast

    • 59
    • 74

    Rain Showers

    • 44
    • 69

    Mostly Sunny

    • 46
    • 64

    Partly Sunny

    • 46
    • 60

    Rain Showers Likely

    • 47
    • 64

    Slight Chance Rain Showers

    • 46
    • 63

    Partly Sunny

Today 17 Sep Merrimack

Mostly cloudy. A chance of Sprinkles in the Morning, then Showers likely with a slight chance of Thunderstorms in the afternoon. Highs in the mid 70s. Light and variable Winds. Chance of rain 70 percent.

Tonight 17 Sep Merrimack

Mostly cloudy. Showers with a slight chance of Thunderstorms in the Evening, then a chance of Showers after midnight. Patchy fog. Lows in the upper 50s. Light and variable Winds. Chance of rain 90 percent.

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William H Thomas State Forest Temperature Statistics

September Temperature

Laconia, Laconia Municipal Airport (15.5 miles)

  • Lowest 12 September, 2026

    45 °F

  • Average September

    64.2 °F

  • Highest 10 September, 2026

    81 °F

Climate (2021–2026)

Laconia, Laconia Municipal Airport (15.5 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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