Lake Quassapaug Weather Forecast

    • 59
    • 82

    Severe Tstms

    • 48
    • 68

    Rain Showers

    • 49
    • 71

    Mostly Sunny

    • 50
    • 72

    Mostly Cloudy

    • 52
    • 70

    Slight Chance Rain Showers

    • 51
    • 77

    Mostly Sunny

Today 6 Sep Northern New Haven

Showers and Thunderstorms likely. Some Thunderstorms may be severe with damaging Winds, large Hail, frequent Lightning, and heavy rainfall. Highs in the mid 80s. South Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 70 percent.

Tonight 6 Sep Northern New Haven

Showers with a chance of Thunderstorms in the Evening, then Showers with a slight chance of Thunderstorms after midnight. Some Thunderstorms may produce heavy rainfall in the evening. Some Thunderstorms may produce heavy rainfall after midnight. Lows around 60. North Winds 5 to 10 Mph. Gusts up to 20 Mph in the evening. Chance of rain 90 percent.

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Lake Quassapaug Temperature Statistics

September Temperature

Oxford, Waterbury-Oxford Airport (3.1 miles)

  • Lowest 3 September, 2025

    48.9 °F

  • Average September

    63.5 °F

  • Highest 2 September, 2025

    77 °F

Climate (2020–Present)

Oxford, Waterbury-Oxford Airport (3.1 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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