Yes
you do need a jacket based on the weather in Alum Rock (Alum Rock), California, United States 1 second ago
Why? Because it's not very warm out!
59°F15°C & Clear
Wind is 1 mph2 km/h from the Northwest, gusting to 2 mph4 km/h
| September 4 | ||||
| 11am | 59°F15°C | 1 mph1 km/h West | Mostly Cloudy | |
| 12pm | 62°F17°C | 2 mph3 km/h West | Partly Cloudy | |
| 1pm | 65°F19°C | 3 mph4 km/h West | Mostly Clear | |
| 2pm | 69°F21°C | 4 mph7 km/h West | Clear | |
| 3pm | 72°F22°C | 6 mph10 km/h Northwest | Mostly Clear | |
| 4pm | 75°F24°C | 7 mph12 km/h Northwest | Mostly Clear | |
| 5pm | 78°F25°C | 8 mph12 km/h Northwest | Mostly Clear | |
| 6pm | 79°F26°C | 9 mph14 km/h Northwest | Mostly Clear | |
| 7pm | 80°F26°C | 9 mph14 km/h Northwest | Mostly Clear | |
| 8pm | 77°F25°C | 9 mph14 km/h Northwest | Mostly Clear | |
| 9pm | 74°F23°C | 8 mph13 km/h Northwest | Mostly Clear | |
| 10pm | 70°F21°C | 8 mph12 km/h Northwest | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 4 | 58°F15°C | 80°F26°C | 6 mph9 km/h from Northwest | Mostly Clear | Mostly Cloudy |
| September 5 | 57°F14°C | 76°F25°C | 5 mph9 km/h from Northwest | Partly Cloudy | Partly Cloudy |
| September 6 | 57°F14°C | 80°F26°C | 5 mph9 km/h from Northwest | Mostly Clear | Partly Cloudy |
| September 7 | 62°F17°C | 81°F27°C | 5 mph8 km/h from Northwest | Mostly Clear | Partly Cloudy |
| September 8 | 62°F16°C | 78°F26°C | 6 mph9 km/h from Northwest | Mostly Clear | Mostly Cloudy |
| September 9 | 62°F17°C | 75°F24°C | 5 mph8 km/h from West | Mostly Cloudy | Mostly Cloudy |
| September 10 | 59°F15°C | 76°F24°C | 5 mph8 km/h from West | Mostly Clear | Partly Cloudy |
Yes
Low of 57°F14°C, High of 76°F25°CWind: 5 mph9 km/h
Precipitation: None