No
you don't need a jacket based on the weather in Discovery Bay, CA, USA 1 second ago
74°F23°C & Cloudy
Wind is 3 mph5 km/h from the Southeast, gusting to 7 mph11 km/h
| September 19 | ||||
| 1am | 73°F23°C | 3 mph5 km/h South | Cloudy | |
| 2am | 71°F22°C | 5 mph8 km/h East | Cloudy | |
| 3am | 71°F22°C | 3 mph6 km/h North | Cloudy | |
| 4am | 70°F21°C | 3 mph5 km/h Southeast | Cloudy | |
| 5am | 69°F21°C | 2 mph3 km/h West | Cloudy | |
| 6am | 69°F20°C | 3 mph5 km/h Southeast | Cloudy | |
| 7am | 68°F20°C | 2 mph3 km/h South | Cloudy | |
| 8am | 66°F19°C | 2 mph4 km/h Northwest | Cloudy | |
| 9am | 65°F19°C | 2 mph3 km/h West | Cloudy | |
| 10am | 66°F19°C | 2 mph3 km/h Northwest | Cloudy | |
| 11am | 67°F19°C | 3 mph5 km/h Northwest | Cloudy | |
| 12pm | 68°F20°C | 3 mph5 km/h Northwest | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 18 | 71°F22°C | 89°F32°C | 5 mph8 km/h from Southwest | Mostly Cloudy | Cloudy |
| September 19 | 65°F19°C | 83°F28°C | 3 mph5 km/h from Northwest | Partly Cloudy | Clear |
| September 20 | 60°F15°C | 87°F31°C | 6 mph10 km/h from West | Clear | Clear |
| September 21 | 60°F16°C | 89°F31°C | 6 mph10 km/h from West | Clear | Clear |
| September 22 | 61°F16°C | 94°F34°C | 5 mph9 km/h from Northwest | Clear | Mostly Clear |
| September 23 | 64°F18°C | 91°F33°C | 6 mph9 km/h from West | Mostly Clear | Mostly Clear |
| September 24 | 63°F17°C | 85°F30°C | 7 mph11 km/h from West | Clear | Clear |
No
Low of 65°F19°C, High of 83°F29°CWind: 3 mph5 km/h
Precipitation: 11% rain