Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

Lat: 38.5°NLon: 122.81667°WElev: 125.0ft.

Clear

65°F

18°C

Humidity 70%
Wind Speed N 0 MPH
Barometer 30.06 in (1017.95 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 21 Aug 10:53 AM PDT
Extended Forecast for

Saint Helena CA

  • Today

    Today: Mostly sunny, with a high near 86. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 86 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog after 1am.  Otherwise, increasing clouds, with a low around 53. Calm wind.

    Low: 53 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Areas of fog before 8am.  Otherwise, partly sunny, then gradually becoming sunny, with a high near 89. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 89 °F

    Areas Fog
    then Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 3am.  Otherwise, increasing clouds, with a low around 55. West southwest wind around 5 mph becoming calm  in the evening.

    Low: 55 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 8am.  Otherwise, mostly sunny, with a high near 89. Calm wind.

    High: 89 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 2am.  Otherwise, mostly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Areas of fog before 9am.  Otherwise, mostly sunny, with a high near 86.

    High: 86 °F

    Areas Fog
    then Sunny

  • Monday Night

    Monday Night: Patchy fog after 11pm.  Otherwise, partly cloudy, with a low around 53.

    Low: 53 °F

    Patchy Fog

  • Tuesday

    Tuesday: Areas of fog before 9am.  Otherwise, partly sunny, with a high near 86.

    High: 86 °F

    Areas Fog
    then Mostly
    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 86. Calm wind becoming west southwest around 5 mph in the afternoon.
Tonight
Patchy fog after 1am. Otherwise, increasing clouds, with a low around 53. Calm wind.
Saturday
Areas of fog before 8am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 89. Calm wind becoming west southwest around 5 mph in the afternoon.
Saturday Night
Patchy fog after 3am. Otherwise, increasing clouds, with a low around 55. West southwest wind around 5 mph becoming calm in the evening.
Sunday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 89. Calm wind.
Sunday Night
Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 54.
Monday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 86.
Monday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 53.
Tuesday
Areas of fog before 9am. Otherwise, partly sunny, with a high near 86.
Tuesday Night
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 54.
Wednesday
Areas of fog. Otherwise, mostly sunny, with a high near 89.
Wednesday Night
Patchy fog. Otherwise, partly cloudy, with a low around 55.
Thursday
Patchy fog. Otherwise, mostly sunny, with a high near 90.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Helena CA
 38.51°N 122.46°W (Elev. 203 ft)
2:16 am PDT Aug 21, 2026
11am PDT Aug 21, 2026-6pm PDT Aug 27, 2026
 
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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