William H Thomas State Forest Weather Forecast

    • 20
    • 39

    Decreasing Clouds

    • 31
    • 41

    Rain

    • 19
    • 53

    Rain

    • 25
    • 32

    Chance Snow

    • 15
    • 39

    Partly Sunny

    • 11
    • 27

    Partly Sunny

Today 17 Dec Merrimack

Partly sunny. Highs in the upper 30s. Southwest Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 17 Dec Merrimack

Mostly clear. Lows around 20. West Winds around 10 Mph with Gusts up to 25 Mph this Evening, becoming light and variable.

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William H Thomas State Forest Temperature Statistics

December Temperature

Laconia, Laconia Municipal Airport (15.5 miles)

  • Lowest 9 December, 2025

    -2.9 °F

  • Average December

    21.6 °F

  • Highest 1 December, 2025

    37 °F

Climate (2020–Present)

Laconia, Laconia Municipal Airport (15.5 miles)

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  • Average Low 2020–2025

    39.3 °F

  • Average 2020–2025

    48.3 °F

  • Average High 2020–2025

    57.2 °F
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