Marine Weather Net

Union City, CA Weather Forecast




Union City, California

 Lat: 37.60N, Lon: 122.02W

Current Conditions Updated: 854 AM PDT TUE AUG 25 2026

Overcast
Temp: 61°F
  • Humidity:
  • 83%
  • Winds:
  • 6 MPH W
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.06 in.
  • Dewpoint:
  • 56°F
  • Heat index:
  • 61°F

  • Sunrise:
  • 6:31 AM PDT
  • Sunset:
  • 7:45 PM PDT
  • Moonrise:
  • 6:42 PM PDT
  • Moonset:
  • 3:53 AM PDT

TODAY

PARTLY CLOUDY
Hi: 75°F
Lo: 60°F

WEDNESDAY

PARTLY CLOUDY
Hi: 75°F
Lo: 61°F

THURSDAY

PARTLY CLOUDY
Hi: 75°F
Lo: 61°F

FRIDAY

PARTLY CLOUDY
Hi: 79°F
Lo: 59°F
Weather Forecast In Detail:
Forecast Issued: 602 AM PDT Tue Aug 25 2026

Today...Mostly cloudy in the morning then becoming partly cloudy. Highs in the 70s to lower 80s. West winds 5 to 10 mph increasing to 10 to 20 mph in the afternoon.
Tonight...Mostly cloudy. Lows around 60. West winds 10 to 15 mph...Becoming southeast 5 to 10 mph after midnight.
Wednesday...Mostly cloudy in the morning then becoming partly cloudy. Highs in the mid 70s to lower 80s. West winds around 5 mph increasing to 10 to 20 mph in the afternoon.
Wednesday Night...Mostly clear in the evening then becoming partly cloudy. Lows in the lower 60s. West winds 10 to 20 mph.
Thursday...Partly cloudy. Highs in the mid 70s to lower 80s. West winds 5 to 10 mph increasing to 10 to 20 mph in the afternoon.
Thursday Night...Partly cloudy in the evening then becoming mostly cloudy. Lows in the lower 60s.
Friday...Mostly cloudy in the morning then becoming partly cloudy. Highs in the 60s to upper 70s.
Friday Night...Mostly clear in the evening then becoming partly cloudy. Lows in the upper 50s.
Saturday...Mostly cloudy in the morning then becoming partly cloudy. Highs in the 60s to mid 70s.
Saturday Night...Mostly clear. Lows in the upper 50s.
Sunday...Mostly cloudy in the morning then becoming partly cloudy. Highs in the 60s to mid 70s.
Sunday Night...Clear in the evening then becoming partly cloudy. Lows in the upper 50s.
Monday...Mostly cloudy in the morning then becoming partly cloudy. Highs in the mid 60s to lower 70s. && temperature / precipitation sfo airport 72 58 76 / oakland 74 59 78 / fremont 77 60 80 / redwood city 80 60 83 / mountain view 74 61 77 /
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