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

Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

Lat: 42.10386°NLon: 123.68519°WElev: 1389.0ft.

NA

76°F

24°C

Humidity 19%
Wind Speed NNE 10 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Heat Index76°F (24°C)
Last update 17 Jun 10:52 PM PDT
Extended Forecast for

12 Miles NNE Happy Camp CA

  • Tonight

    Tonight: Mostly cloudy, with a steady temperature around 59. North northeast wind 5 to 9 mph.

    Low: 59 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy through mid morning, then gradual clearing, with a high near 76. Light and variable wind becoming north northeast around 6 mph in the afternoon.

    High: 76 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 57. North northeast wind 5 to 7 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: A slight chance of thunderstorms after 5pm. Mostly sunny, with a high near 69. Light and variable wind becoming south southwest 5 to 8 mph in the afternoon. Chance of precipitation is 10%.

    High: 69 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 11pm. Partly cloudy, with a low around 51. Northeast wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 51 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 48.

    Low: 48 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 52.

    Low: 52 °F

    Clear

Detailed Forecast

Tonight
Mostly cloudy, with a steady temperature around 59. North northeast wind 5 to 9 mph.
Thursday
Mostly cloudy through mid morning, then gradual clearing, with a high near 76. Light and variable wind becoming north northeast around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 57. North northeast wind 5 to 7 mph becoming calm in the evening.
Juneteenth
A slight chance of thunderstorms after 5pm. Mostly sunny, with a high near 69. Light and variable wind becoming south southwest 5 to 8 mph in the afternoon. Chance of precipitation is 10%.
Friday Night
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 11pm. Partly cloudy, with a low around 51. Northeast wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 20%.
Saturday
Sunny, with a high near 67.
Saturday Night
Clear, with a low around 48.
Sunday
Sunny, with a high near 69.
Sunday Night
Clear, with a low around 52.
Monday
Sunny, with a high near 74.
Monday Night
Clear, with a low around 57.
Tuesday
Sunny, with a high near 74.
Tuesday Night
Clear, with a low around 56.
Wednesday
Sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
12 Miles NNE Happy Camp CA
 41.96°N 123.25°W (Elev. 5138 ft)
Last Update:
10:40 pm PDT Jun 17, 2026
Forecast Valid:
11pm PDT Jun 17, 2026-6pm PDT Jun 24, 2026
 
Forecast Discussion
 
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Additional Resources

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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