Haddam Weather Forecast

    • 56
    • 61

    Rain

    • 59
    • 66

    Rain

    • 56
    • 66

    Rain Showers

    • 56
    • 71

    Mostly Cloudy

    • 59
    • 75

    Partly Sunny

    • 60
    • 77

    Partly Sunny

    • 57
    • 76

    Slight Chance Rain Showers

Today 26 Sep Northern Middlesex

Partly sunny. Highs around 70.

Tonight 26 Sep Northern Middlesex

Rain with isolated Thunderstorms. Rain may be heavy at Times after midnight. Windy with Lows in the mid 50s. North Winds 25 to 30 Mph with Gusts up to 50 Mph. Chance of rain near 100 percent.

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Haddam Temperature Statistics

September Temperature

Chester, Chester Airport (6.2 miles)

  • Lowest 24 September, 2026

    46.4 °F

  • Average September

    66.5 °F

  • Highest 10 September, 2026

    86 °F

Climate (2021–2026)

Chester, Chester Airport (6.2 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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