North Great River Weather Forecast

    • 66
    • 75

    Chance Rain Showers

    • 65
    • 83

    Severe Tstms

    • 64
    • 81

    Mostly Sunny

    • 67
    • 82

    Partly Sunny

    • 69
    • 82

    Partly Sunny

    • 69
    • 86

    Mostly Sunny

Today 18 Jun Southwest Suffolk

Cloudy. Widespread dense fog this morning. A chance of Showers this Morning, then a chance of Showers with isolated Thunderstorms this afternoon. Visibility one quarter mile or less at Times this morning. Highs in the mid 70s. South Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 18 Jun Southwest Suffolk

Mostly cloudy. Showers likely with isolated Thunderstorms in the evening. Some Thunderstorms may produce heavy rainfall in the evening. Lows in the upper 60s. South Winds around 5 Mph. Chance of rain 60 percent.

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North Great River Temperature Statistics

June Temperature

Islip, Long Island Mac Arthur Airport (4.3 miles)

  • Lowest 2 June, 2025

    49.6 °F

  • Average June

    67.8 °F

  • Highest 12 June, 2025

    87.1 °F

Climate (2020–Present)

Islip, Long Island Mac Arthur Airport (4.3 miles)

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    63 °F
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