Connecticut River - Haddam Island State Park Weather Forecast

    • 45
    • 66

    Mostly Cloudy

    • 56
    • 64

    Rain

    • 53
    • 70

    Partly Sunny

    • 51
    • 69

    Rain Showers Likely

    • 43
    • 64

    Mostly Sunny

    • 45
    • 63

    Partly Sunny

Today 10 Oct Northern Middlesex

Mostly sunny. Highs in the mid 60s. North Winds around 5 Mph.

Tonight 10 Oct Northern Middlesex

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the mid 40s. Light and variable Winds.

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Connecticut River - Haddam Island State Park Temperature Statistics

October Temperature

Chester, Chester Airport (7.5 miles)

  • Lowest 7 October, 2026

    37.4 °F

  • Average October

    60.5 °F

  • Highest 2 October, 2026

    80.6 °F

Climate (2021–2026)

Chester, Chester Airport (7.5 miles)

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  • Average Low 2021–2026

    45.1 °F

  • Average 2021–2026

    53.5 °F

  • Average High 2021–2026

    62.6 °F
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