Connecticut River - Haddam Weather Forecast

    • 41
    • 51

    Breezy

    • 26
    • 58

    Rain Showers

    • 31
    • 42

    Mostly Cloudy

    • 22
    • 47

    Partly Sunny

    • 21
    • 33

    Partly Sunny

    • 29
    • 40

    Chance Rain/Snow

Today 18 Dec Northern Middlesex

Sunny. Highs around 50. South Winds 5 to 10 Mph.

Tonight 18 Dec Northern Middlesex

Cloudy. A slight chance of Showers in the Evening, then Showers after midnight. Breezy and not as cool with Lows around 40. Temperature rising into the mid 50s after midnight. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph, increasing to south 20 to 25 Mph with Gusts up to 40 Mph after midnight. Chance of rain 90 percent.

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Connecticut River - Haddam Temperature Statistics

December Temperature

Chester, Chester Airport (6.2 miles)

  • Lowest 5 December, 2025

    10.4 °F

  • Average December

    29.8 °F

  • Highest 10 December, 2025

    48.2 °F

Climate (2020–Present)

Chester, Chester Airport (6.2 miles)

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  • Average Low 2020–2025

    45.2 °F

  • Average 2020–2025

    53.6 °F

  • Average High 2020–2025

    62.6 °F
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