Colchester Weather Forecast

    • 54
    • 61

    Rain

    • 57
    • 65

    Rain Showers

    • 55
    • 65

    Rain Showers

    • 55
    • 69

    Mostly Cloudy

    • 57
    • 73

    Partly Sunny

    • 58
    • 74

    Partly Sunny

Today 26 Sep Northern New London

Rain with a slight chance of Thunderstorms. Breezy with Highs in the lower 60s. Northeast Winds 20 to 25 Mph with Gusts up to 50 Mph. Chance of rain near 100 percent.

Tonight 26 Sep Northern New London

Rain in the Evening, then rain with a slight chance of Thunderstorms after midnight. Windy with Lows in the mid 50s. Northeast Winds 20 to 30 Mph with Gusts up to 50 Mph. Chance of rain near 100 percent.

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Colchester Temperature Statistics

September Temperature

Willimantic, Windham Airport (13.7 miles)

  • Lowest 24 September, 2026

    42.1 °F

  • Average September

    64.1 °F

  • Highest 10 September, 2026

    84 °F

Climate (2021–2026)

Willimantic, Windham Airport (13.7 miles)

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  • Average Low 2021–2026

    41.3 °F

  • Average 2021–2026

    51.5 °F

  • Average High 2021–2026

    61.6 °F
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