St James Weather Forecast

    • 9
    • 34

    Decreasing Clouds

    • 12
    • 18

    Snow

    • 21
    • 28

    Snow

    • 11
    • 29

    Chance Snow

    • 11
    • 22

    Partly Sunny

    • 11
    • 24

    Mostly Cloudy

Today 23 Jan Northwest Suffolk

Mostly sunny. Highs in the mid 30s. West Winds 15 to 20 Mph. Gusts up to 25 Mph, increasing to 35 Mph this afternoon.

Tonight 23 Jan Northwest Suffolk

Partly cloudy and Blustery, cooler with Lows around 9 above. Northwest Winds 15 to 25 Mph with Gusts up to 40 Mph. Wind chill Values as low as 6 below after midnight.

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  • Temperature Real-Time

St James Temperature Statistics

January Temperature

Islip, Long Island Mac Arthur Airport (6.2 miles)

  • Lowest 20 January, 2026

    15.1 °F

  • Average January

    35.2 °F

  • Highest 9 January, 2026

    51.1 °F

Climate (2021–Present)

Islip, Long Island Mac Arthur Airport (6.2 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63.1 °F
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