National Weather Service Forecast for: Union City CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:26 pm PDT Jul 5, 2025
 
Tonight

Tonight: Partly cloudy, with a low around 52. Northwest wind around 7 mph.
Partly Cloudy
Sunday

Sunday: Partly sunny, then gradually becoming sunny, with a high near 73. Northwest wind 5 to 13 mph.
Becoming
Sunny
Sunday
Night
Sunday Night: Mostly clear, with a low around 54. Northwest wind 5 to 11 mph.
Mostly Clear
Monday

Monday: Sunny, with a high near 76. Light west wind becoming west northwest 6 to 11 mph in the afternoon.
Sunny
Monday
Night
Monday Night: Mostly clear, with a low around 55. West northwest wind 6 to 13 mph.
Mostly Clear
Tuesday

Tuesday: Sunny, with a high near 75.
Sunny
Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 56.
Partly Cloudy
Wednesday

Wednesday: Mostly sunny, with a high near 76.
Mostly Sunny
Wednesday
Night
Wednesday Night: Mostly clear, with a low around 56.
Mostly Clear
Lo 52 °F Hi 73 °F Lo 54 °F Hi 76 °F Lo 55 °F Hi 75 °F Lo 56 °F Hi 76 °F Lo 56 °F

 

Tonight
 
Partly cloudy, with a low around 52. Northwest wind around 7 mph.
Sunday
 
Partly sunny, then gradually becoming sunny, with a high near 73. Northwest wind 5 to 13 mph.
Sunday Night
 
Mostly clear, with a low around 54. Northwest wind 5 to 11 mph.
Monday
 
Sunny, with a high near 76. Light west wind becoming west northwest 6 to 11 mph in the afternoon.
Monday Night
 
Mostly clear, with a low around 55. West northwest wind 6 to 13 mph.
Tuesday
 
Sunny, with a high near 75.
Tuesday Night
 
Partly cloudy, with a low around 56.
Wednesday
 
Mostly sunny, with a high near 76.
Wednesday Night
 
Mostly clear, with a low around 56.
Thursday
 
Sunny, with a high near 86.
Thursday Night
 
Mostly clear, with a low around 59.
Friday
 
Sunny, with a high near 83.
Friday Night
 
Mostly clear, with a low around 57.
Saturday
 
Sunny, with a high near 79.

 

Forecast from NOAA-NWS for Union City CA.