Seymour Weather Forecast

    • 64
    • 85

    Mostly Sunny

    • 70
    • 92

    Partly Sunny

    • 52
    • 90

    Rain Showers

    • 48
    • 70

    Partly Sunny

    • 48
    • 65

    Rain Showers Likely

    • 50
    • 64

    Rain Showers Likely

Today 18 May Northern New Haven

Sunny. Highs in the mid 80s. East Winds 5 to 10 Mph, becoming south with Gusts up to 20 Mph this afternoon.

Tonight 18 May Northern New Haven

Mostly clear. Lows in the mid 60s. South Winds 5 to 10 Mph. Gusts up to 20 Mph in the evening.

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Seymour Temperature Statistics

May Temperature

Oxford, Waterbury-Oxford Airport (6.2 miles)

  • Lowest 1 May, 2026

    39 °F

  • Average May

    54 °F

  • Highest 5 May, 2026

    75 °F

Climate (2021–Present)

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

    59.4 °F
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