Severe Thunderstorms in Portions of the Mississippi Valley and Great Lakes

A few severe thunderstorms with large hail, are expected across parts of the middle and upper Mississippi River Valley tonight through early morning. Snow and a wintry mix overnight in the Upper Midwest into the Great Lakes can cause hazardous travel conditions. Fire weather concerns continue for a large portion of the central and southern High Plains and Four Corners region this evening. Read More >

Current conditions at

LOS ALTOS (LOAC1)

Lat: 37.35472°NLon: 122.14167°WElev: 539.0ft.

NA

59°F

15°C

Humidity 83%
Wind Speed SSE 2 MPH
Barometer NA
Dewpoint 54°F (12°C)
Visibility NA
Last update 31 Mar 02:10 AM PDT
Extended Forecast for

5 Miles WSW Cupertino CA

  • Overnight

    Overnight: A 30 percent chance of rain, mainly after 5am.  Mostly cloudy, with a low around 54. Southwest wind around 7 mph.

    Low: 54 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain likely, mainly before 2pm.  Mostly cloudy, with a high near 62. South southwest wind around 7 mph.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 62 °F

    Rain Likely

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain, mainly between 8pm and 9pm.  Mostly cloudy, with a low around 50. South southwest wind 5 to 7 mph.

    Low: 50 °F

    Chance Rain

  • Wednesday

    Wednesday: A 50 percent chance of rain.  Partly sunny, with a high near 60. Southwest wind 6 to 8 mph, with gusts as high as 20 mph.  New precipitation amounts of less than a tenth of an inch possible.

    High: 60 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after 11pm.  Mostly cloudy, with a low around 49. Southwest wind around 7 mph, with gusts as high as 18 mph.  Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 49 °F

    Rain Likely

  • Thursday

    Thursday: A 20 percent chance of rain before 11am.  Sunny, with a high near 58.

    High: 58 °F

    Slight Chance
    Rain then
    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 47.

    Low: 47 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Friday Night

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

    Low: 52 °F

    Mostly Clear

Detailed Forecast

Overnight
A 30 percent chance of rain, mainly after 5am. Mostly cloudy, with a low around 54. Southwest wind around 7 mph.
Tuesday
Rain likely, mainly before 2pm. Mostly cloudy, with a high near 62. South southwest wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
A 30 percent chance of rain, mainly between 8pm and 9pm. Mostly cloudy, with a low around 50. South southwest wind 5 to 7 mph.
Wednesday
A 50 percent chance of rain. Partly sunny, with a high near 60. Southwest wind 6 to 8 mph, with gusts as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Rain likely, mainly after 11pm. Mostly cloudy, with a low around 49. Southwest wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
A 20 percent chance of rain before 11am. Sunny, with a high near 58.
Thursday Night
Clear, with a low around 47.
Friday
Sunny, with a high near 68.
Friday Night
Mostly clear, with a low around 52.
Saturday
Sunny, with a high near 75.
Saturday Night
Mostly clear, with a low around 56.
Sunday
Mostly sunny, with a high near 75.
Sunday Night
Partly cloudy, with a low around 54.
Monday
Mostly sunny, with a high near 71.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Cupertino CA
 37.29°N 122.14°W (Elev. 1798 ft)
1:26 am PDT Mar 31, 2026
3am PDT Mar 31, 2026-6pm PDT Apr 6, 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