No
you don't need a jacket based on the weather in Altadena, CA, USA 1 second ago
61°F16°C & Mostly Cloudy
Wind is 2 mph3 km/h from the Southeast, gusting to 4 mph6 km/h
| July 21 | ||||
| 11am | 62°F17°C | 2 mph4 km/h South | Mostly Cloudy | |
| 12pm | 64°F18°C | 3 mph5 km/h South | Mostly Cloudy | |
| 1pm | 66°F19°C | 4 mph6 km/h South | Mostly Cloudy | |
| 2pm | 70°F21°C | 5 mph8 km/h South | Partly Cloudy | |
| 3pm | 73°F23°C | 6 mph10 km/h South | Mostly Clear | |
| 4pm | 77°F25°C | 7 mph11 km/h South | Clear | |
| 5pm | 79°F26°C | 7 mph12 km/h South | Clear | |
| 6pm | 80°F26°C | 7 mph12 km/h South | Mostly Clear | |
| 7pm | 79°F26°C | 7 mph11 km/h South | Clear | |
| 8pm | 78°F26°C | 6 mph10 km/h South | Mostly Clear | |
| 9pm | 76°F25°C | 6 mph10 km/h South | Mostly Clear | |
| 10pm | 73°F23°C | 5 mph8 km/h South | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| July 21 | 60°F16°C | 80°F26°C | 5 mph9 km/h from South | Mostly Clear | Partly Cloudy |
| July 22 | 60°F16°C | 80°F27°C | 5 mph9 km/h from Southwest | Clear | Mostly Clear |
| July 23 | 60°F15°C | 83°F28°C | 5 mph8 km/h from Southwest | Clear | Clear |
| July 24 | 63°F17°C | 85°F30°C | 5 mph8 km/h from Southwest | Clear | Clear |
| July 25 | 63°F17°C | 83°F29°C | 5 mph8 km/h from South | Clear | Clear |
| July 26 | 60°F16°C | 81°F27°C | 5 mph8 km/h from South | Clear | Clear |
| July 27 | 59°F15°C | 82°F28°C | 5 mph8 km/h from South | Clear | Clear |
No
Low of 60°F16°C, High of 81°F27°CWind: 5 mph9 km/h
Precipitation: None