No
you don't need a jacket based on the weather in Altadena, CA 91001, USA 1 second ago
68°F20°C & Clear
Wind is 4 mph6 km/h from the Southeast, gusting to 6 mph9 km/h
| July 4 | ||||
| 12am | 66°F19°C | 3 mph5 km/h Southeast | Clear | |
| 1am | 65°F18°C | 2 mph3 km/h East | Clear | |
| 2am | 63°F17°C | 1 mph2 km/h Northeast | Clear | |
| 3am | 63°F17°C | 2 mph3 km/h North | Clear | |
| 4am | 62°F17°C | 1 mph2 km/h North | Clear | |
| 5am | 61°F16°C | 1 mph2 km/h North | Clear | |
| 6am | 60°F16°C | 1 mph2 km/h Northeast | Clear | |
| 7am | 60°F15°C | 2 mph3 km/h Northeast | Clear | |
| 8am | 59°F15°C | 2 mph4 km/h North | Clear | |
| 9am | 59°F15°C | 2 mph3 km/h North | Clear | |
| 10am | 61°F16°C | 1 mph2 km/h Northeast | Clear | |
| 11am | 65°F18°C | 2 mph4 km/h South | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| July 3 | 61°F16°C | 77°F25°C | 4 mph7 km/h from South | Clear | Clear |
| July 4 | 59°F15°C | 80°F27°C | 6 mph9 km/h from South | Clear | Clear |
| July 5 | 61°F16°C | 82°F28°C | 6 mph9 km/h from South | Clear | Clear |
| July 6 | 64°F18°C | 83°F28°C | 5 mph8 km/h from South | Clear | Clear |
| July 7 | 63°F17°C | 82°F28°C | 5 mph8 km/h from South | Clear | Clear |
| July 8 | 66°F19°C | 88°F31°C | 4 mph7 km/h from Southwest | Clear | Mostly Clear |
| July 9 | 74°F23°C | 93°F34°C | 5 mph8 km/h from Southwest | Clear | Mostly Clear |
No
Low of 59°F15°C, High of 81°F27°CWind: 6 mph9 km/h
Precipitation: None