Trimountain State Park Weather Forecast

    • 59
    • 71

    Chance Rain Showers

    • 59
    • 77

    Chance Rain Showers

    • 49
    • 78

    Mostly Sunny

    • 48
    • 69

    Mostly Sunny

    • 51
    • 69

    Partly Sunny

    • 56
    • 74

    Partly Sunny

Today 17 Sep Northern Middlesex

Mostly cloudy. A chance of Showers this afternoon. Highs in the lower 70s. East Winds 5 to 10 Mph. Chance of rain 40 percent.

Tonight 17 Sep Northern Middlesex

Mostly cloudy with a 50 percent chance of Showers. Lows in the upper 50s. East Winds around 5 Mph.

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Trimountain State Park Temperature Statistics

September Temperature

Meriden, Meriden Markham Municipal Airport (6.2 miles)

  • Lowest 8 September, 2025

    46 °F

  • Average September

    65 °F

  • Highest 6 September, 2025

    82 °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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