No
you don't need a jacket based on the weather in Hayward, CA, USA 5 minutes ago
74°F23°C & Clear
Wind is 8 mph13 km/h from the West, gusting to 13 mph21 km/h
| July 11 | ||||
| 10pm | 71°F22°C | 7 mph11 km/h Northwest | Clear | |
| 11pm | 68°F20°C | 6 mph9 km/h West | Clear | |
| July 12 | ||||
| 12am | 65°F18°C | 4 mph7 km/h Northwest | Clear | |
| 1am | 63°F17°C | 3 mph6 km/h West | Clear | |
| 2am | 61°F16°C | 3 mph5 km/h West | Clear | |
| 3am | 60°F16°C | 3 mph5 km/h West | Clear | |
| 4am | 60°F16°C | 3 mph5 km/h West | Mostly Clear | |
| 5am | 59°F15°C | 3 mph5 km/h West | Mostly Clear | |
| 6am | 58°F15°C | 3 mph5 km/h West | Mostly Clear | |
| 7am | 57°F14°C | 3 mph5 km/h West | Partly Cloudy | |
| 8am | 57°F14°C | 3 mph4 km/h West | Partly Cloudy | |
| 9am | 56°F14°C | 2 mph4 km/h West | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| July 11 | 57°F14°C | 81°F27°C | 5 mph8 km/h from West | Clear | Mostly Clear |
| July 12 | 56°F14°C | 77°F25°C | 6 mph10 km/h from West | Clear | Partly Cloudy |
| July 13 | 57°F14°C | 77°F25°C | 6 mph10 km/h from West | Mostly Clear | Partly Cloudy |
| July 14 | 57°F14°C | 79°F26°C | 6 mph10 km/h from West | Mostly Clear | Mostly Clear |
| July 15 | 57°F14°C | 71°F22°C | 7 mph11 km/h from West | Mostly Clear | Partly Cloudy |
| July 16 | 58°F14°C | 71°F22°C | 7 mph11 km/h from West | Partly Cloudy | Partly Cloudy |
| July 17 | 57°F14°C | 71°F22°C | 7 mph11 km/h from West | Mostly Clear | Partly Cloudy |
Yes
Low of 56°F14°C, High of 77°F25°CWind: 6 mph10 km/h
Precipitation: None