No
you don't need a jacket based on the weather in Fullerton, CA, USA 1 second ago
60°F16°C & Mostly Cloudy
Wind is 6 mph9 km/h from the Southwest, gusting to 13 mph21 km/h
| December 24 | ||||
| 9pm | 59°F15°C | 6 mph9 km/h Southwest | Mostly Cloudy | |
| 10pm | 57°F14°C | 4 mph7 km/h Southwest | Partly Cloudy | |
| 11pm | 56°F13°C | 3 mph5 km/h South | Partly Cloudy | |
| December 25 | ||||
| 12am | 54°F12°C | 3 mph5 km/h South | Partly Cloudy | |
| 1am | 53°F12°C | 3 mph5 km/h Southeast | Mostly Clear | |
| 2am | 52°F11°C | 3 mph4 km/h Southeast | Mostly Clear | |
| 3am | 51°F10°C | 3 mph5 km/h East | Mostly Clear | |
| 4am | 50°F10°C | 4 mph6 km/h Southeast | Partly Cloudy | |
| 5am | 48°F9°C | 3 mph5 km/h East | Partly Cloudy | |
| 6am | 47°F8°C | 3 mph5 km/h East | Partly Cloudy | |
| 7am | 47°F8°C | 4 mph6 km/h East | Partly Cloudy | |
| 8am | 46°F8°C | 4 mph6 km/h East | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| December 24 | 51°F10°C | 62°F17°C | 3 mph5 km/h from Southwest | Mostly Cloudy | Partly Cloudy |
| December 25 | 45°F7°C | 65°F18°C | 3 mph5 km/h from Southwest | Mostly Clear | Mostly Cloudy |
| December 26 | 47°F8°C | 66°F19°C | 4 mph6 km/h from South | Partly Cloudy | Partly Cloudy |
| December 27 | 47°F8°C | 67°F19°C | 4 mph6 km/h from Southwest | Mostly Cloudy | Mostly Cloudy |
| December 28 | 48°F9°C | 68°F20°C | 3 mph4 km/h from Southwest | Mostly Cloudy | Partly Cloudy |
| December 29 | 48°F9°C | 68°F20°C | 3 mph6 km/h from Southwest | Mostly Clear | Partly Cloudy |
| December 30 | 47°F8°C | 68°F20°C | 3 mph4 km/h from Southwest | Mostly Clear | Mostly Clear |
Yes
Low of 46°F8°C, High of 65°F19°CWind: 3 mph5 km/h
Precipitation: None