Connecticut River - Gildersleeve Island Weather Forecast

    • 40
    • 51

    Breezy

    • 26
    • 59

    Rain Showers

    • 32
    • 40

    Mostly Cloudy

    • 22
    • 46

    Partly Sunny

    • 20
    • 32

    Partly Sunny

    • 28
    • 38

    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 - Gildersleeve Island Temperature Statistics

December Temperature

Hartford, Hartford-Brainard Airport (8.7 miles)

  • Lowest 9 December, 2025

    10 °F

  • Average December

    29.1 °F

  • Highest 10 December, 2025

    46.9 °F

Climate (2020–Present)

Hartford, Hartford-Brainard Airport (8.7 miles)

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  • Average Low 2020–2025

    45.2 °F

  • Average 2020–2025

    54.2 °F

  • Average High 2020–2025

    63.4 °F
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