National Weather Service Forecast for: Walnut Creek CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 8:57 am PDT Oct 6, 2026
 
Today

Today: Sunny and hot, with a high near 101. Calm wind becoming west northwest around 6 mph in the afternoon.
Hot
 Tonight

Tonight: Clear, with a low around 62. Light south southwest wind.
Clear
 Wednesday

Wednesday: Sunny and hot, with a high near 99. Calm wind becoming west around 6 mph in the afternoon.
Hot
 Wednesday
Night
Wednesday Night: Clear, with a low around 60. West southwest wind around 5 mph becoming calm in the evening.
Clear
 Thursday

Thursday: Sunny and hot, with a high near 98. Light west wind.
Hot
 Thursday
Night
Thursday Night: Clear, with a low around 61.
Clear
 Friday

Friday: Sunny, with a high near 88.
Sunny
 Friday
Night
Friday Night: Mostly clear, with a low around 58.
Mostly Clear
 Saturday

Saturday: Sunny, with a high near 78.
Sunny
Hi 101 °F Lo 62 °F Hi 99 °F Lo 60 °F Hi 98 °F Lo 61 °F Hi 88 °F Lo 58 °F Hi 78 °F

Heat Advisory
 

Today
 
 Sunny and hot, with a high near 101. Calm wind becoming west northwest around 6 mph in the afternoon.
Tonight
 
 Clear, with a low around 62. Light south southwest wind.
Wednesday
 
 Sunny and hot, with a high near 99. Calm wind becoming west around 6 mph in the afternoon.
Wednesday Night
 
 Clear, with a low around 60. West southwest wind around 5 mph becoming calm in the evening.
Thursday
 
 Sunny and hot, with a high near 98. Light west wind.
Thursday Night
 
 Clear, with a low around 61.
Friday
 
 Sunny, with a high near 88.
Friday Night
 
 Mostly clear, with a low around 58.
Saturday
 
 Sunny, with a high near 78.
Saturday Night
 
 Mostly clear, with a low around 53.
Sunday
 
 Sunny, with a high near 77.
Sunday Night
 
 Mostly clear, with a low around 53.
Columbus Day
 
 Sunny, with a high near 80.

 

Forecast from NOAA-NWS for Walnut Creek CA.