National Weather Service Forecast for: Walnut Creek CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 2:54 pm PST Dec 22, 2025
 
Tonight

Tonight: A 40 percent chance of rain. Patchy fog before midnight. Otherwise, cloudy, with a low around 53. Light and variable wind.
Chance Rain
and Patchy
Fog
 Tuesday

Tuesday: Rain likely, mainly after 10am. Cloudy, with a high near 60. South wind 7 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Rain Likely

 Tuesday
Night
Tuesday Night: Rain. Low around 50. South southeast wind 15 to 21 mph, with gusts as high as 45 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Rain

 Wednesday

Wednesday: Rain, mainly before 4pm, then showers and possibly a thunderstorm after 4pm. High near 59. South southeast wind 7 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers

 Wednesday
Night
Wednesday Night: Showers and possibly a thunderstorm before 7pm, then rain between 7pm and 4am, then showers and possibly a thunderstorm after 4am. Low around 52. South southeast wind 14 to 18 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Showers

 Christmas
Day
Christmas Day: Showers and possibly a thunderstorm before 7am, then rain between 7am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 54. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Showers

 Thursday
Night
Thursday Night: Showers and possibly a thunderstorm before 10pm, then rain after 10pm. Low around 47. Chance of precipitation is 100%.
Showers

 Friday

Friday: Rain, mainly before 4pm. Cloudy, with a high near 53.
Rain

 Friday
Night
Friday Night: A chance of rain, mainly before 10pm. Mostly cloudy, with a low around 44.
Chance Rain
Lo 53 °F Hi 60 °F Lo 50 °F Hi 59 °F Lo 52 °F Hi 54 °F Lo 47 °F Hi 53 °F Lo 44 °F

Flood Watch
Wind Advisory
 

Tonight
 
 A 40 percent chance of rain. Patchy fog before midnight. Otherwise, cloudy, with a low around 53. Light and variable wind.
Tuesday
 
 Rain likely, mainly after 10am. Cloudy, with a high near 60. South wind 7 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
 
 Rain. Low around 50. South southeast wind 15 to 21 mph, with gusts as high as 45 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Wednesday
 
 Rain, mainly before 4pm, then showers and possibly a thunderstorm after 4pm. High near 59. South southeast wind 7 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
 
 Showers and possibly a thunderstorm before 7pm, then rain between 7pm and 4am, then showers and possibly a thunderstorm after 4am. Low around 52. South southeast wind 14 to 18 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Christmas Day
 
 Showers and possibly a thunderstorm before 7am, then rain between 7am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 54. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
 
 Showers and possibly a thunderstorm before 10pm, then rain after 10pm. Low around 47. Chance of precipitation is 100%.
Friday
 
 Rain, mainly before 4pm. Cloudy, with a high near 53.
Friday Night
 
 A chance of rain, mainly before 10pm. Mostly cloudy, with a low around 44.
Saturday
 
 Mostly sunny, with a high near 53.
Saturday Night
 
 Patchy frost. Otherwise, mostly clear, with a low around 39.
Sunday
 
 Patchy frost. Otherwise, sunny, with a high near 52.
Sunday Night
 
 Patchy frost. Otherwise, mostly clear, with a low around 38.
Monday
 
 Mostly sunny, with a high near 52.

 

Forecast from NOAA-NWS for Walnut Creek CA.