Cornwall Weather Forecast

    • 49
    • 70

    Increasing Clouds

    • 59
    • 79

    Partly Sunny

    • 62
    • 79

    Chance Rain Showers

    • 53
    • 77

    Partly Sunny

    • 56
    • 72

    Chance Rain Showers

    • 53
    • 73

    Chance Rain Showers

Today 15 Sep Northern Litchfield

Sunny. Highs in the upper 60s. Northeast Winds around 5 Mph, becoming south in the afternoon.

Tonight 15 Sep Northern Litchfield

Mostly clear in the Evening, then becoming partly cloudy. Lows around 50. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cornwall Temperature Statistics

September Temperature

Oxford, Waterbury-Oxford Airport (26.7 miles)

  • Lowest 7 September, 2026

    48.9 °F

  • Average September

    66.5 °F

  • Highest 10 September, 2026

    82 °F

Climate (2021–2026)

Oxford, Waterbury-Oxford Airport (26.7 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    51 °F

  • Average High 2021–2026

    59.4 °F
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