Ronkonkoma Weather Forecast

    • 64
    • 83

    Sunny

    • 67
    • 81

    Mostly Sunny

    • 71
    • 80

    Rain Showers

    • 66
    • 82

    Rain Showers Likely

    • 66
    • 81

    Mostly Sunny

    • 67
    • 83

    Partly Sunny

Today 19 Jul Southwest Suffolk

Sunny. Highs in the lower 80s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 19 Jul Southwest Suffolk

Mostly clear. Lows in the mid 60s. North Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ronkonkoma Temperature Statistics

July Temperature

Islip, Long Island Mac Arthur Airport (1.2 miles)

  • Lowest 7 July, 2026

    63.6 °F

  • Average July

    77 °F

  • Highest 3 July, 2026

    98.7 °F

Climate (2021–2026)

Islip, Long Island Mac Arthur Airport (1.2 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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