Yes

you do need a jacket based on the weather in Manhattan Beach, CA 90266, USA 1 second ago

Why? Because the air feels like the cozy middle ground between summer and winter!
52°F11°C & Cloudy

Wind is 6 mph10 km/h from the Northeast, gusting to 10 mph16 km/h
January 22
9am52°F11°C7 mph11 km/h NortheastCloudy
10am52°F11°C6 mph10 km/h NortheastCloudy
11am54°F12°C6 mph9 km/h NortheastCloudy
12pm57°F14°C4 mph7 km/h NortheastCloudy
1pm61°F16°C3 mph4 km/h NortheastCloudy
2pm64°F18°C4 mph6 km/h SouthCloudy
3pm64°F18°C5 mph8 km/h SouthwestMostly Cloudy
4pm66°F19°C5 mph8 km/h WestMostly Cloudy
5pm65°F18°C6 mph9 km/h WestMostly Cloudy
6pm64°F18°C5 mph8 km/h WestMostly Cloudy
7pm63°F17°C4 mph7 km/h WestPartly Cloudy
8pm61°F16°C4 mph6 km/h WestPartly Cloudy
DateLowHighWindDayNight
January 2252°F11°C66°F19°C4 mph7 km/h from WestMostly CloudyClear
January 2353°F11°C69°F20°C4 mph7 km/h from NorthwestClearClear
January 2452°F11°C65°F18°C5 mph9 km/h from WestMostly ClearMostly Cloudy
January 2551°F11°C58°F14°C9 mph14 km/h from SouthMostly CloudyDrizzle
January 2649°F10°C56°F13°C6 mph9 km/h from SoutheastDrizzlePartly Cloudy
January 2747°F8°C55°F13°C7 mph11 km/h from WestPartly CloudyMostly Clear
January 2849°F9°C56°F13°C6 mph9 km/h from WestClearMostly Clear

Yes

Low of 53°F12°C, High of 69°F21°C
Wind: 4 mph7 km/h
Precipitation: None

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