South Valley Stream Weather Forecast

    • 28
    • 58

    Slight Chance Rain Showers

    • 35
    • 41

    Increasing Clouds

    • 26
    • 45

    Partly Sunny

    • 30
    • 37

    Rain/Snow Likely

    • 35
    • 42

    Chance Rain/Snow

    • 33
    • 43

    Partly Sunny

    • 40
    • 47

    Chance Rain

Today 19 Dec Southern Nassau

Partly sunny with a 50 percent chance of Showers. Breezy with Highs in the upper 50s. Temperature falling into the upper 40s late. West Winds 15 to 25 Mph with Gusts up to 50 Mph.

Tonight 19 Dec Southern Nassau

Partly cloudy. A slight chance of rain Showers in the evening. Windy, cooler with Lows in the upper 20s. West Winds 20 to 30 Mph. Gusts up to 50 Mph, decreasing to 40 Mph after midnight. Chance of rain 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

South Valley Stream Temperature Statistics

December Temperature

New York, Kennedy International Airport (2.5 miles)

  • Lowest 9 December, 2025

    19 °F

  • Average December

    32.9 °F

  • Highest 2 December, 2025

    45 °F

Climate (2020–Present)

New York, Kennedy International Airport (2.5 miles)

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

  • Average Low 2020–2025

    49.5 °F

  • Average 2020–2025

    56.3 °F

  • Average High 2020–2025

    63.6 °F
Get WillyWeather+ to remove ads