Islip Weather Forecast

    • 16
    • 33

    Slight Chance Snow

    • 20
    • 30

    Slight Chance Snow Showers

    • 26
    • 34

    Partly Sunny

    • 30
    • 43

    Partly Sunny

    • 44
    • 51

    Rain

    • 25
    • 48

    Slight Chance Rain

Today 14 Dec Southwest Suffolk

Snow late this Morning, then partly sunny with a slight chance of snow this afternoon. Snow accumulation of 1 to 3 Inches. Highs in the lower 30s. Northwest Winds 15 to 20 Mph with Gusts up to 35 Mph. Chance of snow 90 percent.

Tonight 14 Dec Southwest Suffolk

Partly cloudy in the Evening, then clearing. Blustery, cooler with Lows around 18. Northwest Winds 15 to 25 Mph with Gusts up to 40 Mph. Wind chill Values as low as zero.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Islip Temperature Statistics

December Temperature

Islip, Long Island Mac Arthur Airport (6.8 miles)

  • Lowest 5 December, 2025

    21 °F

  • Average December

    35.2 °F

  • Highest 10 December, 2025

    50 °F

Climate (2020–Present)

Islip, Long Island Mac Arthur Airport (6.8 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    55.3 °F

  • Average High 2020–2025

    63.1 °F
Get WillyWeather+ to remove ads