Seymour Weather Forecast

    • 71
    • 89

    Chance Thunderstorms

    • 70
    • 88

    Thunderstorms Likely

    • 65
    • 87

    Partly Sunny

    • 62
    • 87

    Slight Chance Thunderstorms

    • 60
    • 82

    Mostly Sunny

    • 66
    • 85

    Partly Sunny

    • 71
    • 91

    Mostly Cloudy

Today 30 Jun Northern New Haven

Mostly sunny. Highs in the upper 80s. South Winds 5 to 10 Mph.

Tonight 30 Jun Northern New Haven

Partly cloudy this Evening, then mostly cloudy with Showers likely with a chance of Thunderstorms after midnight. Lows in the lower 70s. South Winds 5 to 10 Mph. Chance of rain 60 percent.

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Seymour Temperature Statistics

June Temperature

Oxford, Waterbury-Oxford Airport (6.2 miles)

  • Lowest 2 June, 2025

    44.1 °F

  • Average June

    68.5 °F

  • Highest 24 June, 2025

    95 °F

Climate (2020–Present)

Oxford, Waterbury-Oxford Airport (6.2 miles)

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  • Average Low 2020–2025

    43 °F

  • Average 2020–2025

    51.3 °F

  • Average High 2020–2025

    59.6 °F
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