Weather WorldUnion Lake, CA Weather Forecast
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Union Lake Weather Forecast
| TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  |  |  | | | | | | | |  |
| Mostly Clear | Partly Cloudy | Clearing | Sunny | Clear | Clear | Clear | Clear | Clear | Mostly Clear | Mostly Clear | Chance of Rain |
| Lo: 60°FLo: 16°C | Hi: 87°FHi: 31°C | Lo: 60°FLo: 16°C | Hi: 89°FHi: 32°C | Hi: 89°FHi: 32°C Lo: 59°FLo: 15°C | Hi: 89°FHi: 32°C Lo: 59°FLo: 15°C | Hi: 91°FHi: 33°C Lo: 59°FLo: 15°C | Hi: 91°FHi: 33°C Lo: 59°FLo: 15°C | Hi: 91°FHi: 33°C Lo: 59°FLo: 15°C | Hi: 82°FHi: 28°C Lo: 53°FLo: 12°C | Hi: 82°FHi: 28°C Lo: 53°FLo: 12°C | Hi: 70°FHi: 21°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 158 PM PDT Sat Oct 03 2026 
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Issued: 446 PM PDT Sat Oct 3 2026
Aviation
...00z update...LIFR conditions will continue for ACV and CEC this afternoon. A fog bank with variable visibilities continues to ebb and flow over the terminals. Periods of 1/4SM FG will oscillate with visibilities up to 2SM through the evening before dense fog sets in around 06Z. Winds will remain light (<10kt) both along the coast and inland. Coastal winds will remain northerly for a few more hours before a southerly switch develops later tonight. Inland areas can expect VFR through the TAF period. DS
Watches / Warnings / Advisories
/WARNINGS/ADVISORIES... CA... Heat Advisory until 11 PM PDT Sunday for CAZ112-113-118>120.
NORTHWEST CALIFORNIA COASTAL WATERS... Small Craft Advisory until 9 AM PDT Sunday for PZZ470-475.