Connecticut River - Haddam Island State Park Weather Forecast

    • 61
    • 86

    Mostly Sunny

    • 63
    • 85

    Mostly Sunny

    • 67
    • 86

    Mostly Sunny

    • 74
    • 93

    Mostly Sunny

    • 68
    • 97

    Hot

    • 68
    • 90

    Partly Sunny

    • 66
    • 89

    Slight Chance Rain Showers

Today 11 Jul Northern Middlesex

Sunny. Highs in the lower 80s. Southeast Winds around 5 Mph.

Tonight 11 Jul Northern Middlesex

Mostly clear. Lows in the lower 60s. Southeast Winds around 5 Mph, becoming northeast after midnight.

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Connecticut River - Haddam Island State Park Temperature Statistics

July Temperature

Chester, Chester Airport (7.5 miles)

  • Lowest 6 July, 2026

    60.8 °F

  • Average July

    76.4 °F

  • Highest 2 July, 2026

    98.6 °F

Climate (2021–2026)

Chester, Chester Airport (7.5 miles)

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  • Average Low 2021–2026

    45.2 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    62.6 °F
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