No
you don't need a jacket based on the weather in Union City, CA, USA 1 second ago
70°F21°C & Mostly Cloudy
Wind is 3 mph5 km/h from the West, gusting to 4 mph7 km/h
| September 18 | ||||
| 2pm | 72°F22°C | 5 mph8 km/h West | Cloudy | |
| 3pm | 75°F24°C | 5 mph8 km/h West | Cloudy | |
| 4pm | 77°F25°C | 7 mph11 km/h West | Cloudy | |
| 5pm | 77°F25°C | 8 mph13 km/h West | Cloudy | |
| 6pm | 77°F25°C | 9 mph15 km/h Northwest | Cloudy | |
| 7pm | 75°F24°C | 9 mph15 km/h Northwest | Cloudy | |
| 8pm | 73°F23°C | 8 mph13 km/h Northwest | Mostly Cloudy | |
| 9pm | 71°F22°C | 8 mph13 km/h Northwest | Mostly Cloudy | |
| 10pm | 69°F21°C | 7 mph12 km/h Northwest | Cloudy | |
| 11pm | 67°F20°C | 6 mph9 km/h Northwest | Cloudy | |
| September 19 | ||||
| 12am | 66°F19°C | 5 mph8 km/h Northwest | Cloudy | |
| 1am | 66°F19°C | 4 mph6 km/h West | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 18 | 64°F18°C | 77°F25°C | 6 mph10 km/h from Northwest | Mostly Cloudy | Mostly Cloudy |
| September 19 | 62°F17°C | 77°F25°C | 4 mph7 km/h from West | Mostly Clear | Partly Cloudy |
| September 20 | 60°F16°C | 77°F25°C | 5 mph8 km/h from West | Mostly Clear | Mostly Clear |
| September 21 | 59°F15°C | 78°F25°C | 5 mph8 km/h from West | Mostly Clear | Clear |
| September 22 | 58°F15°C | 90°F32°C | 4 mph6 km/h from Northwest | Clear | Mostly Clear |
| September 23 | 63°F17°C | 83°F28°C | 3 mph5 km/h from Northwest | Mostly Clear | Partly Cloudy |
| September 24 | 62°F17°C | 79°F26°C | 4 mph7 km/h from West | Mostly Clear | Mostly Clear |
No
Low of 62°F17°C, High of 77°F25°CWind: 4 mph7 km/h
Precipitation: 15% rain