Weather in Union City, CA
Updated 2026-09-26 10:30 local time · ZIP codes 94587
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
65°2% rain69°1% rain73°1% rain75°1% rain
77°6% rain
77°4% rain76°2% rain75°1% rain72°1% rain
67°5% rain
64°4% rain
63°11% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 15%).
It feels like 64°F with winds near 2 mph.
69°F, 1% rain chance and 3 mph wind.
Visibility is around 6 mi; gusts may reach 20 mph.
Current temperature is 65°F, wind 2 mph, rain chance up to 15%.
UV index is 2.
Local weather characteristics in Union City
California weather varies from cool marine conditions along parts of the Pacific coast to hot inland valleys, deserts and snowy mountain climates. Short distances can produce large temperature differences.
Union City is part of the West weather region. The forecast point is near 37.60°N latitude and 122.02°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Union City weather today
Sunny and 65°F in Union City, CA. Today's high is 77°F with a 4% rain chance. Winds are around 2 mph with gusts near 3 mph. Relative humidity is 51%, pressure is 29.95 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Union City
Sunrise is at 06:59 AM and sunset is at 06:59 PM. Tomorrow's forecast calls for Sunny with a high near 72°F and a low near 58°F. The maximum rain chance is 7%.