National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Current conditions at

New York, Kennedy International Airport (KJFK)

Lat: 40.64°NLon: 73.76°WElev: 10ft.

A Few Clouds

74°F

23°C

Humidity 91%
Wind Speed SW 7 mph
Barometer 29.95 in (1014.2 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 31 Jul 11:51 pm EDT
Extended Forecast for

South Valley Stream NY

  • Overnight

    Overnight: Patchy fog after 2am. Otherwise, mostly clear, with a low around 70. Southwest wind around 7 mph.

    Low: 70 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 84. South wind 5 to 14 mph.

    High: 84 °F

    Patchy Fog
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 71. South wind 7 to 11 mph.

    Low: 71 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 82. South wind 9 to 16 mph.

    High: 82 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers, then showers and possibly a thunderstorm after 2am. Low around 73. South wind 7 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 73 °F

    Slight Chance
    Showers then
    Showers

  • Monday

    Monday: Showers, with thunderstorms also possible after 2pm. Some of the storms could produce heavy rainfall. High near 83. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 83 °F

    Heavy Rain

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Some of the storms could produce heavy rainfall. Low around 71. Chance of precipitation is 80%.

    Low: 71 °F

    Heavy Rain

  • Tuesday

    Tuesday: A 40 percent chance of showers. Partly sunny, with a high near 84.

    High: 84 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    Showers

Detailed Forecast

Overnight
Patchy fog after 2am. Otherwise, mostly clear, with a low around 70. Southwest wind around 7 mph.
Saturday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 84. South wind 5 to 14 mph.
Saturday Night
Mostly cloudy, with a low around 71. South wind 7 to 11 mph.
Sunday
Partly sunny, with a high near 82. South wind 9 to 16 mph.
Sunday Night
A slight chance of showers, then showers and possibly a thunderstorm after 2am. Low around 73. South wind 7 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers, with thunderstorms also possible after 2pm. Some of the storms could produce heavy rainfall. High near 83. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Some of the storms could produce heavy rainfall. Low around 71. Chance of precipitation is 80%.
Tuesday
A 40 percent chance of showers. Partly sunny, with a high near 84.
Tuesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 71.
Wednesday
A 30 percent chance of showers after 2pm. Partly sunny, with a high near 84.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 73.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 85.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 73.
Friday
A 30 percent chance of showers. Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
South Valley Stream NY
 40.66°N 73.73°W (Elev. 7 ft)
Last Update:
10:19 pm EDT Jul 31, 2026
Forecast Valid:
12am EDT Aug 1, 2026-6pm EDT Aug 7, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation