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

Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Current conditions at

Nevada County Air Park (KGOO)

Lat: 39.224028°NLon: 121.003083°WElev: 3154.0ft.

Clear

84°F

29°C

Humidity 42%
Wind Speed WNW 6 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 16 Jun 12:15 PM PDT
Extended Forecast for

Grass Valley CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 90. Southwest wind around 5 mph.

    High: 90 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 62. South southwest wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 87 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61. Southwest wind around 5 mph becoming calm in the evening.

    Low: 61 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of rain after 11pm. Partly cloudy, with a low around 57.

    Low: 57 °F

    Slight Chance
    Rain

  • Juneteenth

    Juneteenth: A 30 percent chance of rain before 11am. Mostly sunny, with a high near 77.

    High: 77 °F

    Chance Rain
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 90. Southwest wind around 5 mph.
Tonight
Clear, with a low around 62. South southwest wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 87. Calm wind becoming west southwest around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 61. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 84. Calm wind becoming southwest around 6 mph in the afternoon.
Thursday Night
A 20 percent chance of rain after 11pm. Partly cloudy, with a low around 57.
Juneteenth
A 30 percent chance of rain before 11am. Mostly sunny, with a high near 77.
Friday Night
Mostly clear, with a low around 52.
Saturday
Sunny, with a high near 78.
Saturday Night
Clear, with a low around 54.
Sunday
Sunny, with a high near 82.
Sunday Night
Clear, with a low around 57.
Monday
Sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grass Valley CA
 39.23°N 121.08°W (Elev. 2598 ft)
Last Update:
11:26 am PDT Jun 16, 2026
Forecast Valid:
12pm PDT Jun 16, 2026-6pm PDT Jun 22, 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