National Weather Service Forecast for: Cupertino CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:40 am PST Dec 5, 2025
 
Overnight

Overnight: Mostly clear, with a low around 40. Northwest wind 3 to 5 mph.
Mostly Clear
 Friday

Friday: Sunny, with a high near 63. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Sunny
 Friday
Night
Friday Night: Increasing clouds, with a low around 44. Light and variable wind.
Increasing
Clouds
 Saturday

Saturday: Mostly cloudy through mid morning, then gradual clearing, with a high near 65. Calm wind becoming north northwest 5 to 8 mph in the morning.
Becoming
Sunny
 Saturday
Night
Saturday Night: Mostly clear, with a low around 45. West northwest wind around 7 mph.
Mostly Clear
 Sunday

Sunday: Mostly sunny, with a high near 66.
Mostly Sunny
 Sunday
Night
Sunday Night: Partly cloudy, with a low around 46.
Partly Cloudy
 Monday

Monday: Mostly sunny, with a high near 67.
Mostly Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 46.
Mostly Clear
Lo 40 °F Hi 63 °F Lo 44 °F Hi 65 °F Lo 45 °F Hi 66 °F Lo 46 °F Hi 67 °F Lo 46 °F

 

Overnight
 
 Mostly clear, with a low around 40. Northwest wind 3 to 5 mph.
Friday
 
 Sunny, with a high near 63. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Friday Night
 
 Increasing clouds, with a low around 44. Light and variable wind.
Saturday
 
 Mostly cloudy through mid morning, then gradual clearing, with a high near 65. Calm wind becoming north northwest 5 to 8 mph in the morning.
Saturday Night
 
 Mostly clear, with a low around 45. West northwest wind around 7 mph.
Sunday
 
 Mostly sunny, with a high near 66.
Sunday Night
 
 Partly cloudy, with a low around 46.
Monday
 
 Mostly sunny, with a high near 67.
Monday Night
 
 Mostly clear, with a low around 46.
Tuesday
 
 Mostly sunny, with a high near 68.
Tuesday Night
 
 Partly cloudy, with a low around 49.
Wednesday
 
 Mostly sunny, with a high near 69.
Wednesday Night
 
 Mostly clear, with a low around 48.
Thursday
 
 Patchy fog. Otherwise, sunny, with a high near 69.

 

Forecast from NOAA-NWS for Cupertino CA.