No
you don't need a jacket based on the weather in Altadena, CA 91001, USA 1 second ago
69°F21°C & Clear
Wind is 1 mph1 km/h from the Northeast, gusting to 4 mph6 km/h
| September 7 | ||||
| 5am | 68°F20°C | 1 mph2 km/h East | Clear | |
| 6am | 68°F20°C | 1 mph2 km/h East | Clear | |
| 7am | 67°F20°C | 2 mph4 km/h East | Clear | |
| 8am | 68°F20°C | 2 mph4 km/h East | Clear | |
| 9am | 68°F20°C | 1 mph1 km/h Northeast | Clear | |
| 10am | 68°F20°C | 1 mph1 km/h Northeast | Clear | |
| 11am | 71°F21°C | 1 mph2 km/h Southeast | Clear | |
| 12pm | 74°F24°C | 3 mph5 km/h South | Clear | |
| 1pm | 77°F25°C | 5 mph7 km/h South | Clear | |
| 2pm | 79°F26°C | 6 mph9 km/h South | Clear | |
| 3pm | 81°F27°C | 7 mph11 km/h South | Clear | |
| 4pm | 83°F28°C | 7 mph12 km/h South | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 7 | 67°F20°C | 84°F29°C | 5 mph9 km/h from Southwest | Clear | Clear |
| September 8 | 64°F18°C | 81°F27°C | 6 mph9 km/h from Southwest | Clear | Clear |
| September 9 | 59°F15°C | 76°F24°C | 6 mph9 km/h from South | Clear | Mostly Clear |
| September 10 | 56°F14°C | 70°F21°C | 6 mph10 km/h from South | Mostly Clear | Mostly Clear |
| September 11 | 55°F13°C | 71°F21°C | 5 mph8 km/h from South | Mostly Clear | Clear |
| September 12 | 55°F13°C | 72°F22°C | 5 mph8 km/h from Southwest | Clear | Clear |
| September 13 | 58°F14°C | 74°F23°C | 5 mph7 km/h from Southwest | Clear | Clear |
No
Low of 64°F18°C, High of 82°F28°CWind: 6 mph9 km/h
Precipitation: None