National Weather Service Forecast for: Cupertino CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 2:06 am PST Nov 2, 2026
 
Overnight

Overnight: Partly cloudy, with a low around 47. Calm wind.
Partly Cloudy

 Monday

Monday: Partly sunny, with a high near 70. Light and variable wind.
Partly Sunny

 Monday
Night
Monday Night: Cloudy during the early evening, then becoming partly cloudy, with a low around 50. Calm wind becoming south around 6 mph.
Partly Cloudy

 Tuesday

Tuesday: Rain likely, mainly before 1pm. Partly sunny, with a high near 66. South wind around 8 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Rain Likely

 Tuesday
Night
Tuesday Night: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 49. Calm wind becoming east southeast around 5 mph.
Partly Cloudy
then Patchy
Fog
 Wednesday

Wednesday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 69.
Patchy Fog
then Sunny
 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 50.
Partly Cloudy

 Thursday

Thursday: Mostly sunny, with a high near 72.
Mostly Sunny

 Thursday
Night
Thursday Night: Mostly clear, with a low around 49.
Mostly Clear
Lo 47 °F Hi 70 °F Lo 50 °F Hi 66 °F Lo 49 °F Hi 69 °F Lo 50 °F Hi 72 °F Lo 49 °F

 

Overnight
 
 Partly cloudy, with a low around 47. Calm wind.
Monday
 
 Partly sunny, with a high near 70. Light and variable wind.
Monday Night
 
 Cloudy during the early evening, then becoming partly cloudy, with a low around 50. Calm wind becoming south around 6 mph.
Tuesday
 
 Rain likely, mainly before 1pm. Partly sunny, with a high near 66. South wind around 8 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
 
 Patchy fog after 5am. Otherwise, partly cloudy, with a low around 49. Calm wind becoming east southeast around 5 mph.
Wednesday
 
 Patchy fog before 8am. Otherwise, mostly sunny, with a high near 69.
Wednesday Night
 
 Partly cloudy, with a low around 50.
Thursday
 
 Mostly sunny, with a high near 72.
Thursday Night
 
 Mostly clear, with a low around 49.
Friday
 
 Sunny, with a high near 74.
Friday Night
 
 Mostly clear, with a low around 52.
Saturday
 
 Sunny, with a high near 78.
Saturday Night
 
 Mostly clear, with a low around 54.
Sunday
 
 Mostly sunny, with a high near 78.

 

Forecast from NOAA-NWS for Cupertino CA.