Average temperature in Union City (CA)
The mean minimum and maximum temperatures over the year in Union City (California), the United States of America.
- On average, the warmest month is September with 25°C.
- On average, the coolest month is December with 15°C.
- The average annual maximum temperature is 20°C.
- The average annual minimum temperature is 10°C.
Forecast for Union City (CA)
almost clear and no rain
almost clear and no rain
clear and no rain