Seymour Weather Forecast

    • 57
    • 82

    Partly Sunny

    • 51
    • 83

    Mostly Sunny

    • 48
    • 73

    Mostly Sunny

    • 52
    • 72

    Partly Sunny

    • 57
    • 77

    Partly Sunny

    • 60
    • 82

    Partly Sunny

Today 18 Sep Northern New Haven

Patchy fog this morning. Partly sunny with a slight chance of Showers this Morning, then sunny this afternoon. Highs in the lower 80s. North Winds around 5 Mph, becoming northwest around 5 Mph this afternoon. Chance of rain 20 percent.

Tonight 18 Sep Northern New Haven

Clear. Lows in the upper 50s. West Winds around 5 Mph.

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Seymour Temperature Statistics

September Temperature

Oxford, Waterbury-Oxford Airport (6.2 miles)

  • Lowest 8 September, 2025

    45 °F

  • Average September

    63.5 °F

  • Highest 6 September, 2025

    81 °F

Climate (2020–Present)

Oxford, Waterbury-Oxford Airport (6.2 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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