Lake Ronkonkoma County Park Weather Forecast

    • 68
    • 81

    Chance Rain Showers

    • 66
    • 80

    Rain Showers

    • 65
    • 77

    Rain Showers

    • 66
    • 79

    Chance Rain Showers

    • 68
    • 82

    Mostly Sunny

    • 70
    • 83

    Mostly Cloudy

Today 27 Jul Northwest Suffolk

Partly sunny. A slight chance of Showers and Thunderstorms in the afternoon. Highs in the lower 80s. South Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 27 Jul Northwest Suffolk

Mostly cloudy. A slight chance of Showers and Thunderstorms in the Evening, then a chance of Showers with a slight chance of Thunderstorms after midnight. Lows in the upper 60s. South Winds 5 to 10 Mph. Chance of rain 50 percent.

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Lake Ronkonkoma County Park Temperature Statistics

July Temperature

Islip, Long Island Mac Arthur Airport (1.9 miles)

  • Lowest 24 July, 2026

    59 °F

  • Average July

    75.7 °F

  • Highest 3 July, 2026

    98.7 °F

Climate (2021–2026)

Islip, Long Island Mac Arthur Airport (1.9 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63.1 °F
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