National Weather Service Forecast for: Vallejo CA
Issued by: National Weather Service Sacramento, CA
Updated: 1:21 pm PST Dec 4, 2025
 
Overnight

Overnight: Mostly clear, with a low around 42. Calm wind.
Mostly Clear

 Friday

Friday: Sunny, with a high near 61. Light and variable wind.
Sunny

 Friday
Night
Friday Night: Patchy fog between 2am and 3am. Otherwise, partly cloudy, with a low around 45. Calm wind.
Mostly Clear
then Patchy
Fog
 Saturday

Saturday: Mostly sunny, with a high near 61. Calm wind.
Mostly Sunny

 Saturday
Night
Saturday Night: Patchy fog after 1am. Otherwise, partly cloudy, with a low around 46. Calm wind.
Mostly Clear
then Patchy
Fog
 Sunday

Sunday: Patchy fog before 10am. Otherwise, partly sunny, with a high near 61.
Patchy Fog
then Partly
Sunny
 Sunday
Night
Sunday Night: Patchy fog before 1am, then patchy fog after 2am. Otherwise, partly cloudy, with a low around 46.
Patchy Fog

 Monday

Monday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 62.
Patchy Fog
then Mostly
Sunny
 Monday
Night
Monday Night: Partly cloudy, with a low around 46.
Partly Cloudy
Lo 42 °F Hi 61 °F Lo 45 °F Hi 61 °F Lo 46 °F Hi 61 °F Lo 46 °F Hi 62 °F Lo 46 °F

Dense Fog Advisory
 

Overnight
 
 Mostly clear, with a low around 42. Calm wind.
Friday
 
 Sunny, with a high near 61. Light and variable wind.
Friday Night
 
 Patchy fog between 2am and 3am. Otherwise, partly cloudy, with a low around 45. Calm wind.
Saturday
 
 Mostly sunny, with a high near 61. Calm wind.
Saturday Night
 
 Patchy fog after 1am. Otherwise, partly cloudy, with a low around 46. Calm wind.
Sunday
 
 Patchy fog before 10am. Otherwise, partly sunny, with a high near 61.
Sunday Night
 
 Patchy fog before 1am, then patchy fog after 2am. Otherwise, partly cloudy, with a low around 46.
Monday
 
 Patchy fog before 9am. Otherwise, mostly sunny, with a high near 62.
Monday Night
 
 Partly cloudy, with a low around 46.
Tuesday
 
 Partly sunny, with a high near 62.
Tuesday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 47.
Wednesday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 63.
Wednesday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 47.
Thursday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 63.

 

Forecast from NOAA-NWS for Vallejo CA.