National Weather Service Forecast for: Walnut Creek CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:25 am PST Dec 22, 2025
 
Today

Today: Rain. Patchy fog. High near 59. South wind 5 to 7 mph becoming west in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain and
Patchy Fog
 Tonight

Tonight: Rain. Areas of fog. Low around 53. Light and variable wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain and
Areas Fog
 Tuesday

Tuesday: Rain likely. Areas of fog before 10am. Otherwise, cloudy, with a high near 60. South southeast wind 5 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain Likely
and Areas Fog
 Tuesday
Night
Tuesday Night: Rain. Low around 50. South wind around 16 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Rain
 Wednesday

Wednesday: Rain. Patchy fog between 10am and noon. High near 57. South wind around 8 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Rain and
Patchy Fog
 Wednesday
Night
Wednesday Night: Rain and possibly a thunderstorm before 7pm, then showers and possibly a thunderstorm between 7pm and 10pm, then rain after 10pm. Patchy fog before 7pm. Low around 51. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Showers and
Patchy Fog
 Christmas
Day
Christmas Day: Rain. High near 54. Chance of precipitation is 100%.
Rain
 Thursday
Night
Thursday Night: Rain before 10pm, then showers and possibly a thunderstorm between 10pm and 4am, then rain likely and possibly a thunderstorm after 4am. Cloudy, with a low around 46.
Showers
 Friday

Friday: Rain likely, mainly before 4pm. Mostly cloudy, with a high near 53.
Rain Likely
Hi 59 °F Lo 53 °F Hi 60 °F Lo 50 °F Hi 57 °F Lo 51 °F Hi 54 °F Lo 46 °F Hi 53 °F

High Wind Watch
Flood Watch
 

Today
 
 Rain. Patchy fog. High near 59. South wind 5 to 7 mph becoming west in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
 
 Rain. Areas of fog. Low around 53. Light and variable wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
 
 Rain likely. Areas of fog before 10am. Otherwise, cloudy, with a high near 60. South southeast wind 5 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
 
 Rain. Low around 50. South wind around 16 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Wednesday
 
 Rain. Patchy fog between 10am and noon. High near 57. South wind around 8 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday Night
 
 Rain and possibly a thunderstorm before 7pm, then showers and possibly a thunderstorm between 7pm and 10pm, then rain after 10pm. Patchy fog before 7pm. Low around 51. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Christmas Day
 
 Rain. High near 54. Chance of precipitation is 100%.
Thursday Night
 
 Rain before 10pm, then showers and possibly a thunderstorm between 10pm and 4am, then rain likely and possibly a thunderstorm after 4am. Cloudy, with a low around 46.
Friday
 
 Rain likely, mainly before 4pm. Mostly cloudy, with a high near 53.
Friday Night
 
 A chance of rain, mainly before 10pm. Patchy fog before 9pm, then patchy fog after 1am. Otherwise, partly cloudy, with a low around 40.
Saturday
 
 A slight chance of rain. Areas of fog. Otherwise, mostly sunny, with a high near 52.
Saturday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 38.
Sunday
 
 Patchy fog. Otherwise, partly sunny, with a high near 50.

 

Forecast from NOAA-NWS for Walnut Creek CA.