Trimountain State Park Weather Forecast

    • 54
    • 59

    Rain

    • 57
    • 65

    Rain Showers

    • 55
    • 64

    Rain Showers

    • 56
    • 69

    Mostly Cloudy

    • 57
    • 72

    Partly Sunny

    • 59
    • 72

    Partly Sunny

Today 26 Sep Northern Middlesex

Rain likely this Morning, then rain with a slight chance of Thunderstorms this afternoon. Breezy with Highs in the lower 60s. North Winds 20 to 25 Mph with Gusts up to 50 Mph. Chance of rain near 100 percent.

Tonight 26 Sep Northern Middlesex

Rain in the Evening, then rain with a slight chance of Thunderstorms after midnight. Breezy with Lows in the mid 50s. Northeast Winds 15 to 25 Mph with Gusts up to 50 Mph. Chance of rain near 100 percent.

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Trimountain State Park Temperature Statistics

September Temperature

Meriden, Meriden Markham Municipal Airport (6.2 miles)

  • Lowest 7 September, 2026

    48 °F

  • Average September

    65.6 °F

  • Highest 10 September, 2026

    84.9 °F

Climate (2021–2026)

Meriden, Meriden Markham Municipal Airport (6.2 miles)

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  • Average Low 2021–2026

    42.9 °F

  • Average 2021–2026

    53 °F

  • Average High 2021–2026

    62.9 °F
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