Trimountain State Park Weather Forecast

    • 24
    • 42

    Decreasing Clouds

    • 43
    • 48

    Rain Showers

    • 25
    • 53

    Rain Showers

    • 30
    • 38

    Mostly Cloudy

    • 24
    • 44

    Partly Sunny

    • 21
    • 33

    Partly Sunny

Today 17 Dec Northern Middlesex

Mostly sunny. Highs in the lower 40s. Southwest Winds 5 to 10 Mph with Gusts up to 25 Mph.

Tonight 17 Dec Northern Middlesex

Mostly clear. Lows in the mid 20s. West Winds 5 to 10 Mph. Gusts up to 20 Mph in the evening.

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Trimountain State Park Temperature Statistics

December Temperature

Meriden, Meriden Markham Municipal Airport (6.2 miles)

  • Lowest 9 December, 2025

    8.1 °F

  • Average December

    28.8 °F

  • Highest 10 December, 2025

    46.9 °F

Climate (2020–Present)

Meriden, Meriden Markham Municipal Airport (6.2 miles)

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  • Average Low 2020–2025

    43.2 °F

  • Average 2020–2025

    53.2 °F

  • Average High 2020–2025

    63.1 °F
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