Union, California Weather
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Weather Forecast for Union, California : San Luis Obispo County
Issued: 4:01 am PDT Oct 18, 2025 Latitude: 35.6374701 Longitude: -120.5609977 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Sunday Monday Tuesday Wednesday Thursday Friday
Sunny on This Afternoon Clear on Tonight Sunny on Sunday Sunny on Monday Sunny on Tuesday Morning Fog on Wednesday Sunny on Thursday Sunny on Friday
High: 82°F Low: 48°F High: 81°F High: 82°F High: 78°F High: 72°F High: 77°F High: 76°F
Low: 48°F Low: 49°F Low: 47°F Low: 47°F Low: 47°F  
Sunny Clear Sunny Sunny Sunny Morning Fog Sunny Sunny
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Sunny on This Afternoon This Afternoon... Sunny, with a high near 82. East southeast wind around 5 mph becoming southwest.
Clear on Tonight Tonight... Clear, with a low around 48. Southwest wind around 5 mph becoming calm in the evening.
Sunny on Sunday Sunday... Sunny, with a high near 81. Calm wind becoming west northwest around 5 mph.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 48. West wind around 5 mph becoming calm in the evening.
Sunny on Monday Monday... Sunny, with a high near 82. East wind around 5 mph.
Clear on Monday Night Monday Night... Clear, with a low around 49.
Sunny on Tuesday Tuesday... Sunny, with a high near 78.
Patchy Fog on Tuesday Night Tuesday Night... Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 47.
Morning Fog on Wednesday Wednesday... Patchy fog before 11am. Otherwise, mostly sunny, with a high near 72.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 47.
Sunny on Thursday Thursday... Sunny, with a high near 77.
Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 47.
Sunny on Friday Friday... Sunny, with a high near 76.
Sun Almanac for Union, California
Sunrise: 07:12 AM
Sunset: 6:23 PM
Civil Sunrise:06:46 AM
Civil Sunset: 6:48 PM
Nautical Sunrise: 06:16 AM
Nautical Sunset: 7:18 PM
Astro Sunrise: 05:47 AM
Astro Sunset: 7:48 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.