Sumac Island Weather Forecast

    • 39
    • 51

    Rain Likely

    • 38
    • 45

    Rain

    • 29
    • 44

    Chance Rain

    • 31
    • 39

    Partly Sunny

    • 35
    • 42

    Mostly Cloudy

    • 32
    • 45

    Chance Rain Showers

Today 9 Jan Southern New Haven

Partly sunny late this Morning, then mostly cloudy with scattered rain Showers this afternoon. Highs in the lower 50s. South Winds 5 to 10 Mph. Gusts up to 20 Mph this afternoon. Chance of rain 40 percent.

Tonight 9 Jan Southern New Haven

Cloudy. Numerous Showers in the evening. Lows in the upper 30s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming west after midnight. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sumac Island Temperature Statistics

January Temperature

New Haven, Tweed-New Haven Airport (3.7 miles)

  • Lowest 1 January, 2026

    21.9 °F

  • Average January

    31.6 °F

  • Highest 7 January, 2026

    44.1 °F

Climate (2021–Present)

New Haven, Tweed-New Haven Airport (3.7 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    55.8 °F

  • Average High 2021–2026

    63.7 °F
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