| National Weather Service Forecast for:
Union City CA Issued by: National Weather Service San Francisco Bay Area/Monterey, CA |
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| Updated: 1:26 am PDT Jun 22, 2026 | ||||||||||||||||||
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| Today |
Mostly cloudy through mid morning, then gradual clearing, with a high near 76. Light west northwest wind becoming northwest 6 to 11 mph in the morning. |
| Tonight |
Increasing clouds, with a low around 56. Northwest wind 5 to 9 mph becoming calm after midnight. |
| Tuesday |
Mostly cloudy through mid morning, then gradual clearing, with a high near 79. Calm wind becoming west northwest 5 to 9 mph in the afternoon. |
| Tuesday Night |
Increasing clouds, with a low around 56. West northwest wind 5 to 10 mph becoming light west southwest after midnight. |
| Wednesday |
Mostly sunny, with a high near 80. Calm wind becoming west 5 to 9 mph in the afternoon. |
| Wednesday Night |
Mostly clear, with a low around 57. |
| Thursday |
Sunny, with a high near 76. |
| Thursday Night |
Mostly clear, with a low around 56. |
| Friday |
Mostly sunny, with a high near 72. |
| Friday Night |
Partly cloudy, with a low around 57. |
| Saturday |
Mostly sunny, with a high near 71. |
| Saturday Night |
Mostly clear, with a low around 54. |
| Sunday |
Sunny, with a high near 78. |
Forecast from NOAA-NWS for Union City CA.
