Ronkonkoma Weather Forecast

    • 59
    • 81

    Sunny

    • 61
    • 83

    Mostly Sunny

    • 67
    • 88

    Partly Sunny

    • 67
    • 89

    Chance Rain Showers

    • 56
    • 80

    Rain Showers Likely

    • 56
    • 72

    Chance Rain Showers

    • 56
    • 74

    Slight Chance Rain Showers

Today 3 Jun Southwest Suffolk

Sunny. Highs around 80. North Winds 5 to 10 Mph, becoming east this afternoon.

Tonight 3 Jun Southwest Suffolk

Clear. Lows in the upper 50s. Southwest Winds 5 to 10 Mph.

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Ronkonkoma Temperature Statistics

June Temperature

Islip, Long Island Mac Arthur Airport (1.2 miles)

  • Lowest 1 June, 2026

    48.9 °F

  • Average June

    59.5 °F

  • Highest 1 June, 2026

    66.9 °F

Climate (2021–Present)

Islip, Long Island Mac Arthur Airport (1.2 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    55.1 °F

  • Average High 2021–2026

    63 °F
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