Stony Brook Weather Forecast

    • 64
    • 81

    Mostly Sunny

    • 66
    • 80

    Rain Showers Likely

    • 68
    • 82

    Rain Showers Likely

    • 65
    • 77

    Rain Showers Likely

    • 66
    • 81

    Mostly Sunny

    • 68
    • 83

    Partly Sunny

    • 68
    • 86

    Chance Rain Showers

Today 24 Jun Northwest Suffolk

Sunny. Near steady temperature in the lower 80s. West Winds 10 to 15 Mph.

Tonight 24 Jun Northwest Suffolk

Mostly clear. Lows in the mid 60s. West Winds 5 to 10 Mph, becoming northwest after midnight.

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Stony Brook Temperature Statistics

June Temperature

Islip, Long Island Mac Arthur Airport (8.7 miles)

  • Lowest 2 June, 2026

    46.7 °F

  • Average June

    71.3 °F

  • Highest 12 June, 2026

    94.6 °F

Climate (2021–2026)

Islip, Long Island Mac Arthur Airport (8.7 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63 °F
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