Stony Brook Weather Forecast

    • 56
    • 68

    Rain

    • 56
    • 64

    Rain

    • 58
    • 66

    Rain

    • 57
    • 66

    Chance Rain Showers

    • 58
    • 69

    Partly Sunny

    • 60
    • 70

    Partly Sunny

Today 25 Sep Northwest Suffolk

Cloudy. A chance of Showers this afternoon. Breezy with Highs in the upper 60s. Northeast Winds 15 to 25 Mph with Gusts up to 35 Mph. Chance of rain 50 percent.

Tonight 25 Sep Northwest Suffolk

Rain. Very windy with Lows in the mid 50s. Northeast Winds 25 to 35 Mph with Gusts up to 50 Mph. Chance of rain 80 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Stony Brook Temperature Statistics

September Temperature

Islip, Long Island Mac Arthur Airport (8.7 miles)

  • Lowest 15 September, 2026

    52.6 °F

  • Average September

    69.7 °F

  • Highest 10 September, 2026

    86.6 °F

Climate (2021–2026)

Islip, Long Island Mac Arthur Airport (8.7 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    63.1 °F
Get WillyWeather+ to remove ads