Lake Ronkonkoma Weather Forecast

    • 27
    • 38

    Chance Rain

    • 31
    • 43

    Rain

    • 18
    • 38

    Partly Sunny

    • 31
    • 39

    Chance Rain/Snow

    • 29
    • 49

    Mostly Cloudy

    • 24
    • 40

    Partly Sunny

Today 30 Jan Northwest Suffolk

Sunny. Highs in the upper 30s. West Winds 15 to 20 Mph. Gusts up to 30 Mph this morning.

Tonight 30 Jan Northwest Suffolk

Mostly cloudy. A chance of freezing rain after midnight. Lows in the upper 20s. South Winds 10 to 15 Mph. Chance of precipitation 50 percent.

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  • Temperature Real-Time

Lake Ronkonkoma Temperature Statistics

January Temperature

Islip, Long Island Mac Arthur Airport (3.1 miles)

  • Lowest 22 January, 2025

    7.8 °F

  • Average January

    30.5 °F

  • Highest 1 January, 2025

    54.6 °F

Climate (2020–Present)

Islip, Long Island Mac Arthur Airport (3.1 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    55 °F

  • Average High 2020–2025

    62.8 °F
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