No
you don't need a jacket based on the weather in Simi Valley, CA, USA 1 second ago
77°F25°C & Clear
Wind is 2 mph4 km/h from the West, gusting to 5 mph8 km/h
| September 15 | ||||
| 11pm | 75°F24°C | 3 mph4 km/h Northwest | Clear | |
| September 16 | ||||
| 12am | 72°F22°C | 2 mph3 km/h Northwest | Clear | |
| 1am | 70°F21°C | 1 mph2 km/h East | Clear | |
| 2am | 68°F20°C | 3 mph5 km/h East | Clear | |
| 3am | 69°F21°C | 3 mph5 km/h East | Clear | |
| 4am | 68°F20°C | 1 mph2 km/h Northeast | Clear | |
| 5am | 64°F18°C | 3 mph5 km/h Northwest | Clear | |
| 6am | 62°F16°C | 3 mph5 km/h North | Mostly Clear | |
| 7am | 62°F17°C | 3 mph5 km/h Northeast | Mostly Clear | |
| 8am | 63°F17°C | 3 mph5 km/h Northeast | Clear | |
| 9am | 63°F17°C | 3 mph5 km/h Northeast | Clear | |
| 10am | 64°F18°C | 4 mph6 km/h Northeast | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 15 | 57°F14°C | 85°F29°C | 4 mph7 km/h from West | Clear | Clear |
| September 16 | 62°F16°C | 93°F34°C | 5 mph8 km/h from Southwest | Clear | Mostly Clear |
| September 17 | 67°F19°C | 90°F32°C | 6 mph9 km/h from Southwest | Mostly Cloudy | Cloudy |
| September 18 | 69°F20°C | 82°F28°C | 4 mph7 km/h from South | Drizzle | Partly Cloudy |
| September 19 | 67°F20°C | 85°F30°C | 5 mph8 km/h from West | Mostly Clear | Mostly Clear |
| September 20 | 66°F19°C | 88°F31°C | 5 mph8 km/h from Southwest | Clear | Clear |
| September 21 | 64°F18°C | 87°F31°C | 4 mph7 km/h from West | Clear | Mostly Clear |
No
Low of 62°F17°C, High of 93°F34°CWind: 5 mph8 km/h
Precipitation: None