Yes

you do need a jacket based on the weather in Los Angeles, CA, USA 2 minutes ago

Why? Because the cold's there, but it's just a reminder, not an invasion!
45°F7°C & Mostly Clear

Wind is 2 mph4 km/h from the Northeast, gusting to 3 mph5 km/h
January 1
10am45°F7°C3 mph4 km/h NorthMostly Clear
11am48°F9°C2 mph4 km/h NorthMostly Clear
12pm53°F12°C1 mph2 km/h WestPartly Cloudy
1pm58°F14°C1 mph2 km/h SouthwestMostly Clear
2pm62°F17°C2 mph3 km/h SouthwestMostly Clear
3pm66°F19°C3 mph4 km/h SouthwestMostly Clear
4pm68°F20°C4 mph6 km/h SouthwestMostly Clear
5pm69°F20°C4 mph6 km/h SouthwestMostly Clear
6pm68°F20°C4 mph6 km/h SouthwestClear
7pm66°F19°C3 mph5 km/h SouthwestClear
8pm63°F17°C2 mph4 km/h WestClear
9pm60°F15°C2 mph2 km/h NorthwestClear
DateLowHighWindDayNight
January 145°F7°C69°F20°C2 mph4 km/h from WestMostly ClearMostly Clear
January 248°F9°C76°F24°C2 mph3 km/h from NorthwestClearMostly Cloudy
January 350°F10°C67°F19°C3 mph5 km/h from SouthMostly CloudyPartly Cloudy
January 447°F8°C63°F17°C3 mph5 km/h from SouthwestPartly CloudyPartly Cloudy
January 543°F6°C72°F22°C3 mph4 km/h from SouthwestMostly ClearMostly Clear
January 645°F7°C71°F21°C3 mph4 km/h from SouthwestPartly CloudyMostly Clear
January 744°F7°C69°F21°C3 mph6 km/h from NortheastClearClear

Yes

Low of 48°F9°C, High of 76°F25°C
Wind: 2 mph3 km/h
Precipitation: None

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