Housatonic River - Twomile Island Weather Forecast

    • 41
    • 47

    Rain Showers

    • 26
    • 57

    Rain Showers

    • 32
    • 41

    Mostly Cloudy

    • 22
    • 46

    Mostly Sunny

    • 21
    • 34

    Partly Sunny

    • 29
    • 39

    Chance Rain/Snow

    • 26
    • 42

    Partly Sunny

Today 18 Dec Northern Fairfield

Sunny. Highs in the upper 40s. Southeast Winds 5 to 10 Mph.

Tonight 18 Dec Northern Fairfield

A chance of rain in the Evening, then rain after midnight. Not as cool with Lows in the upper 30s. Temperature rising into the lower 50s after midnight. Southeast Winds around 5 Mph, increasing to south 15 to 20 Mph with Gusts up to 30 Mph after midnight. Chance of rain near 100 percent.

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Housatonic River - Twomile Island Temperature Statistics

December Temperature

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

  • Lowest 5 December, 2025

    16 °F

  • Average December

    33.1 °F

  • Highest 10 December, 2025

    50 °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

    63.7 °F
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