William H Thomas State Forest Weather Forecast

    • 50
    • 79

    Increasing Clouds

    • 51
    • 76

    Mostly Cloudy

    • 54
    • 81

    Partly Sunny

    • 42
    • 75

    Sunny

    • 39
    • 70

    Mostly Sunny

    • 48
    • 76

    Partly Sunny

Today 16 Sep Merrimack

Patchy fog this morning. Partly sunny. Visibility one quarter mile or less at Times this morning. Highs in the mid 70s. Light and variable Winds.

Tonight 16 Sep Merrimack

Partly cloudy. Patchy fog after midnight. Lows in the upper 40s. Light and variable Winds.

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William H Thomas State Forest Temperature Statistics

September Temperature

Laconia, Laconia Municipal Airport (15.5 miles)

  • Lowest 10 September, 2025

    44.1 °F

  • Average September

    62.9 °F

  • Highest 3 September, 2025

    80.1 °F

Climate (2020–Present)

Laconia, Laconia Municipal Airport (15.5 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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