No
you don't need a jacket based on the weather in Simi Valley, CA, USA 1 second ago
67°F20°C & Clear
Wind is 2 mph4 km/h from the Southwest, gusting to 3 mph5 km/h
| September 16 | ||||
| 5am | 65°F18°C | 3 mph4 km/h North | Clear | |
| 6am | 63°F17°C | 2 mph3 km/h Northeast | Mostly Clear | |
| 7am | 63°F17°C | 2 mph3 km/h Northeast | Clear | |
| 8am | 64°F18°C | 2 mph3 km/h Northeast | Clear | |
| 9am | 65°F18°C | 2 mph4 km/h Northeast | Clear | |
| 10am | 66°F19°C | 3 mph4 km/h Northeast | Clear | |
| 11am | 69°F21°C | 3 mph5 km/h Northeast | Clear | |
| 12pm | 77°F25°C | 2 mph4 km/h Northeast | Clear | |
| 1pm | 84°F29°C | 2 mph3 km/h East | Clear | |
| 2pm | 88°F31°C | 2 mph3 km/h South | Clear | |
| 3pm | 91°F33°C | 3 mph6 km/h Southwest | Clear | |
| 4pm | 92°F33°C | 6 mph10 km/h Southwest | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 16 | 63°F17°C | 93°F34°C | 5 mph8 km/h from Southwest | Clear | Mostly Clear |
| September 17 | 66°F19°C | 89°F31°C | 5 mph8 km/h from Southwest | Mostly Cloudy | Thunderstorms |
| September 18 | 68°F20°C | 78°F25°C | 4 mph7 km/h from Northeast | Rain | Drizzle |
| September 19 | 67°F20°C | 81°F27°C | 4 mph6 km/h from Southwest | Partly Cloudy | Mostly Clear |
| September 20 | 66°F19°C | 86°F30°C | 4 mph6 km/h from West | Clear | Clear |
| September 21 | 65°F18°C | 87°F31°C | 3 mph6 km/h from West | Mostly Clear | Partly Cloudy |
| September 22 | 69°F20°C | 86°F30°C | 4 mph6 km/h from Northwest | Mostly Clear | Partly Cloudy |
No
Low of 66°F19°C, High of 89°F32°CWind: 5 mph8 km/h
Precipitation: 40% rain