Cornwall Weather Forecast

    • 52
    • 75

    Mostly Cloudy

    • 55
    • 71

    Chance Rain Showers

    • 56
    • 77

    Partly Sunny

    • 44
    • 76

    Mostly Sunny

    • 45
    • 70

    Mostly Sunny

    • 49
    • 72

    Partly Sunny

Today 16 Sep Northern Litchfield

Mostly sunny. Highs in the lower 70s. Northeast Winds around 5 Mph.

Tonight 16 Sep Northern Litchfield

Mostly cloudy. Lows in the lower 50s. East Winds around 5 Mph in the Evening, becoming light and variable.

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Cornwall Temperature Statistics

September Temperature

Oxford, Waterbury-Oxford Airport (26.7 miles)

  • Lowest 8 September, 2025

    45 °F

  • Average September

    63.3 °F

  • Highest 6 September, 2025

    81 °F

Climate (2020–Present)

Oxford, Waterbury-Oxford Airport (26.7 miles)

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  • Average Low 2020–2025

    42.9 °F

  • Average 2020–2025

    51.2 °F

  • Average High 2020–2025

    59.6 °F
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