Housatonic River - Twomile Island Weather Forecast

    • 60
    • 74

    Chance Rain Showers

    • 60
    • 79

    Partly Sunny

    • 51
    • 81

    Mostly Sunny

    • 51
    • 72

    Mostly Sunny

    • 52
    • 72

    Partly Sunny

    • 57
    • 77

    Partly Sunny

Today 17 Sep Northern Fairfield

Mostly cloudy. A slight chance of Showers this Morning, then a chance of Showers this afternoon. Highs in the lower 70s. East Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 17 Sep Northern Fairfield

Mostly cloudy with a 50 percent chance of Showers. Lows in the upper 50s. Northeast Winds 5 to 10 Mph.

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Housatonic River - Twomile Island Temperature Statistics

September Temperature

New Haven, Tweed-New Haven Airport (9.3 miles)

  • Lowest 8 September, 2025

    51.1 °F

  • Average September

    68.7 °F

  • Highest 6 September, 2025

    82.9 °F

Climate (2020–Present)

New Haven, Tweed-New Haven Airport (9.3 miles)

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  • Average Low 2020–2025

    47.6 °F

  • Average 2020–2025

    55.8 °F

  • Average High 2020–2025

    63.8 °F
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