NimbocastUnion City, CA Weather
Live radar, hourly and 7-day forecast, and National Weather Service alerts for Union City, Alameda County, California.
Updated Jul 29, 2026, 2:05 PM local time · Radar refreshes every 5 minutes
☀️
Union City
74°F
Wind 10 mph
Humidity 59%
Cloud cover 8%
UV index 8
Alerts 0
Active alerts
✓
No active National Weather Service alerts for Union City, CA.
Union City weather radar
Light
Heavy
Next 24 hours
Now
☀️
74°F
3 PM
☀️
73°F
4 PM
☀️
72°F
5 PM
☀️
70°F
6 PM
☀️
68°F
7 PM
☀️
67°F
8 PM
☀️
65°F
9 PM
☀️
62°F
10 PM
☀️
60°F
11 PM
☀️
60°F
12 AM
☀️
60°F
1 AM
☀️
59°F
2 AM
☀️
59°F
3 AM
☀️
59°F
4 AM
☀️
59°F
5 AM
☀️
58°F
6 AM
☀️
58°F
7 AM
☀️
60°F
8 AM
☀️
63°F
9 AM
☀️
66°F
10 AM
☀️
69°F
11 AM
☀️
72°F
12 PM
☀️
75°F
1 PM
☀️
76°F
7-day forecast
Today
Jul 29
☁️
74°F
58°F
Thu
Jul 30
☀️
76°F
58°F
Fri
Jul 31
☀️
88°F
56°F
Sat
Aug 1
☁️
90°F
61°F
Sun
Aug 2
☀️
90°F
62°F
Mon
Aug 3
☀️
92°F
63°F
Tue
Aug 4
☀️
94°F
64°F
Weather near Union City
4 mi
Fremont, CA5 mi
Newark, CA6 mi
Hayward, CA8 mi
Castro Valley, CA8 mi
San Lorenzo, CA9 mi
Pleasanton, CA9 mi
Dublin, CA9 mi
Ashland, CA
Alerts are relayed from the National Weather Service and may lag
the official source. In a life-threatening situation always follow
weather.gov and local emergency
broadcasts.