| 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 pm PDT Jun 19, 2026 | ||||||||||||||||||
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| Tonight |
Increasing clouds, with a low around 57. West wind 10 to 15 mph becoming light after midnight. Winds could gust as high as 23 mph. |
| Saturday |
Cloudy through mid morning, then gradual clearing, with a high near 72. Light west southwest wind becoming west northwest 8 to 13 mph in the morning. Winds could gust as high as 21 mph. |
| Saturday Night |
Increasing clouds, with a low around 55. West northwest wind 6 to 11 mph becoming light west after midnight. Winds could gust as high as 20 mph. |
| Sunday |
Mostly cloudy through mid morning, then gradual clearing, with a high near 75. Light west southwest wind becoming west 5 to 10 mph in the afternoon. |
| Sunday Night |
Mostly clear, with a low around 55. West wind 5 to 10 mph becoming light west southwest after midnight. |
| Monday |
Mostly sunny, with a high near 77. |
| Monday Night |
Mostly clear, with a low around 56. |
| Tuesday |
Mostly sunny, with a high near 79. |
| Tuesday Night |
Mostly clear, with a low around 57. |
| Wednesday |
Mostly sunny, with a high near 80. |
| Wednesday Night |
Mostly clear, with a low around 57. |
| Thursday |
Sunny, with a high near 79. |
| Thursday Night |
Mostly clear, with a low around 57. |
| Friday |
Mostly sunny, with a high near 78. |
Forecast from NOAA-NWS for Union City CA.
