Seymour Weather Forecast

    • 54
    • 72

    Partly Sunny

    • 59
    • 74

    Mostly Cloudy

    • 63
    • 77

    Partly Sunny

    • 59
    • 82

    Chance Rain Showers

    • 50
    • 71

    Partly Sunny

    • 51
    • 65

    Chance Rain Showers

    • 44
    • 65

    Mostly Sunny

Today 29 Sep Northern New Haven

Sunny. Highs in the upper 50s.

Tonight 29 Sep Northern New Haven

Partly cloudy. Patchy fog after midnight. Lows in the lower 50s. Northwest Winds around 5 Mph.

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  • Temperature Real-Time

Seymour Temperature Statistics

September Temperature

Oxford, Waterbury-Oxford Airport (6.2 miles)

  • Lowest 15 September, 2026

    46 °F

  • Average September

    63.1 °F

  • Highest 10 September, 2026

    82 °F

Climate (2021–2026)

Oxford, Waterbury-Oxford Airport (6.2 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    51 °F

  • Average High 2021–2026

    59.3 °F
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