No
you don't need a jacket based on the weather in Fullerton, CA, USA 1 second ago
76°F25°C & Clear
Wind is 3 mph5 km/h from the South, gusting to 6 mph10 km/h
| September 16 | ||||
| 12am | 75°F24°C | 3 mph4 km/h South | Clear | |
| 1am | 73°F23°C | 3 mph4 km/h West | Clear | |
| 2am | 71°F22°C | 2 mph3 km/h Southwest | Clear | |
| 3am | 69°F21°C | 2 mph3 km/h West | Clear | |
| 4am | 68°F20°C | 2 mph4 km/h Northwest | Mostly Clear | |
| 5am | 67°F20°C | 2 mph3 km/h Northwest | Mostly Clear | |
| 6am | 67°F19°C | 2 mph3 km/h Northwest | Clear | |
| 7am | 66°F19°C | 2 mph3 km/h North | Clear | |
| 8am | 65°F19°C | 2 mph3 km/h Northeast | Clear | |
| 9am | 65°F18°C | 2 mph3 km/h Northeast | Clear | |
| 10am | 65°F19°C | 2 mph3 km/h Northeast | Clear | |
| 11am | 68°F20°C | 2 mph3 km/h Northeast | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 15 | 67°F19°C | 86°F30°C | 3 mph4 km/h from Southwest | Mostly Clear | Clear |
| September 16 | 65°F18°C | 93°F34°C | 5 mph8 km/h from Southwest | Clear | Mostly Clear |
| September 17 | 69°F20°C | 88°F31°C | 5 mph8 km/h from Southwest | Mostly Cloudy | Cloudy |
| September 18 | 70°F21°C | 84°F29°C | 4 mph7 km/h from Southwest | Drizzle | Mostly Clear |
| September 19 | 70°F21°C | 87°F30°C | 5 mph8 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 20 | 68°F20°C | 88°F31°C | 5 mph8 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 21 | 68°F20°C | 87°F30°C | 5 mph8 km/h from Southwest | Clear | Mostly Clear |
No
Low of 65°F19°C, High of 92°F34°CWind: 5 mph8 km/h
Precipitation: None