Union, California Weather
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Weather Forecast for Union, California : San Luis Obispo County
Issued: 2:04 pm PDT Aug 16, 2025 Latitude: 35.6374701 Longitude: -120.5609977 View on Google Maps

MouseOver for Detail Forecast
Tonight Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Increasing Clouds on Tonight Morning Fog on Sunday Sunny on Monday Sunny on Tuesday Sunny on Wednesday Sunny on Thursday Sunny on Friday Sunny on Saturday
Low: 56°F High: 86°F High: 90°F High: 91°F High: 98°F High: 102°F High: 102°F High: 97°F
Low: 51°F Low: 53°F Low: 55°F Low: 60°F Low: 63°F Low: 62°F  
Increasing Clouds Morning Fog Sunny Sunny Sunny Sunny Sunny Sunny
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Current Conditions at
PASO ROBLES - (KPRB)
88°
Clear
as of 4:53 PM PDST
Rel. Humidity: 35%
Dew Point: 57°F
Visibility: 10 Miles
Pressure: 29.99 in.
Flight Rule: VFR
Wind Data
16 MPH
Gust: 28 MPH
340° North
Cloud Level(s): Clear
Current Conditions at
SAN LUIS OBISPO - (KSBP)
68°
Clear
Smoke
as of 4:56 PM PDST
Rel. Humidity: 77%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
18 MPH
310° Northwest
Cloud Level(s): Clear
Current Conditions at
SANTA MARIA - (KSMX)
64°
Cloudy
as of 4:51 PM PDST
Rel. Humidity: 88%
Dew Point: 61°F
Visibility: 10 Miles
Pressure: 30.03 in.
Flight Rule: IFR
Wind Data
14 MPH
280° West
Cloud Level(s): Solid Overcast at 800ft
Increasing Clouds on Tonight Tonight... Increasing clouds, with a low around 56. Breezy, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Morning Fog on Sunday Sunday... Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 86. West northwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Clear on Sunday Night Sunday Night... Clear, with a low around 51. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.
Sunny on Monday Monday... Sunny, with a high near 90. North northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Clear on Monday Night Monday Night... Clear, with a low around 53. Northwest wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Sunny on Tuesday Tuesday... Sunny, with a high near 91.
Clear on Tuesday Night Tuesday Night... Clear, with a low around 55.
Sunny on Wednesday Wednesday... Sunny and hot, with a high near 98.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 60.
Sunny on Thursday Thursday... Sunny and hot, with a high near 102.
Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 63.
Sunny on Friday Friday... Sunny and hot, with a high near 102.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 62.
Sunny on Saturday Saturday... Sunny and hot, with a high near 97.
Current Radar Image


Sun Almanac for Union, California
Sunrise: 06:23 AM
Sunset: 7:50 PM
Civil Sunrise:05:56 AM
Civil Sunset: 8:17 PM
Nautical Sunrise: 05:23 AM
Nautical Sunset: 8:49 PM
Astro Sunrise: 04:50 AM
Astro Sunset: 9:23 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.