Lake Ronkonkoma County Park Weather Forecast

    • 65
    • 81

    Mostly Sunny

    • 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 26 Jul Northwest Suffolk

Sunny. Highs in the lower 80s. East Winds around 5 Mph.

Tonight 26 Jul Northwest Suffolk

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 60s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

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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