National Weather Service Forecast for: Hillsborough CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 11:27 am PDT Oct 6, 2026
 
This
Afternoon
This Afternoon: Sunny, with a high near 90. Calm wind becoming west northwest around 6 mph.
Sunny

Tonight

Tonight: Clear, with a low around 60. Light west wind.
Clear

Wednesday

Wednesday: Sunny, with a high near 90. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Sunny

Wednesday
Night
Wednesday Night: Mostly clear, with a low around 58. West wind around 5 mph becoming calm  in the evening.
Mostly Clear

Thursday

Thursday: Sunny, with a high near 86. Calm wind becoming west northwest around 5 mph in the afternoon.
Sunny

Thursday
Night
Thursday Night: Mostly clear, with a low around 59.
Mostly Clear

Friday

Friday: Mostly sunny, with a high near 81.
Mostly Sunny

Friday
Night
Friday Night: Mostly clear, with a low around 58.
Mostly Clear

Saturday

Saturday: Mostly sunny, with a high near 67. Breezy.
Mostly Sunny
then Mostly
Sunny and
Breezy
Hi 90 °F Lo 60 °F Hi 90 °F Lo 58 °F Hi 86 °F Lo 59 °F Hi 81 °F Lo 58 °F Hi 67 °F

Heat Advisory
 

This Afternoon
 
Sunny, with a high near 90. Calm wind becoming west northwest around 6 mph.
Tonight
 
Clear, with a low around 60. Light west wind.
Wednesday
 
Sunny, with a high near 90. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Wednesday Night
 
Mostly clear, with a low around 58. West wind around 5 mph becoming calm in the evening.
Thursday
 
Sunny, with a high near 86. Calm wind becoming west northwest around 5 mph in the afternoon.
Thursday Night
 
Mostly clear, with a low around 59.
Friday
 
Mostly sunny, with a high near 81.
Friday Night
 
Mostly clear, with a low around 58.
Saturday
 
Mostly sunny, with a high near 67. Breezy.
Saturday Night
 
Mostly clear, with a low around 54. Breezy.
Sunday
 
Sunny, with a high near 68.
Sunday Night
 
Mostly clear, with a low around 53.
Columbus Day
 
Sunny, with a high near 71.

 

Forecast from NOAA-NWS for Hillsborough CA.