Colchester Weather Forecast

    • 30
    • 39

    Partly Sunny

    • 20
    • 43

    Partly Sunny

    • 23
    • 33

    Partly Sunny

    • 30
    • 39

    Chance Rain/Snow

    • 23
    • 39

    Partly Sunny

    • 34
    • 42

    Chance Rain

Today 20 Dec Northern New London

Mostly sunny. Cooler with Highs around 40. West Winds 10 to 15 Mph. Gusts up to 25 Mph in the morning.

Tonight 20 Dec Northern New London

Mostly cloudy. Lows around 30. Southwest Winds 5 to 10 Mph. Gusts up to 20 Mph after midnight.

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Colchester Temperature Statistics

December Temperature

Willimantic, Windham Airport (13.7 miles)

  • Lowest 9 December, 2025

    6.1 °F

  • Average December

    28 °F

  • Highest 10 December, 2025

    46.9 °F

Climate (2020–Present)

Willimantic, Windham Airport (13.7 miles)

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  • Average Low 2020–2025

    41.6 °F

  • Average 2020–2025

    51.7 °F

  • Average High 2020–2025

    61.7 °F
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