Yes

you do need a jacket based on the weather in Santa Clarita (Valencia), California, United States 1 second ago

Why? Because it's pretty chilly!
58°F15°C & Mostly Clear

Wind is 2 mph4 km/h from the Southwest, gusting to 4 mph7 km/h
October 22
9am57°F14°C3 mph4 km/h WestMostly Clear
10am56°F13°C2 mph3 km/h NortheastMostly Clear
11am55°F13°C2 mph4 km/h NortheastClear
12pm54°F12°C2 mph3 km/h NortheastMostly Clear
1pm54°F12°C2 mph3 km/h WestMostly Clear
2pm53°F12°C3 mph5 km/h NorthMostly Clear
3pm55°F13°C2 mph4 km/h NortheastPartly Cloudy
4pm58°F15°C2 mph4 km/h SouthPartly Cloudy
5pm62°F17°C3 mph5 km/h SouthMostly Clear
6pm65°F19°C4 mph7 km/h SouthMostly Clear
7pm68°F20°C6 mph9 km/h SouthwestMostly Clear
8pm71°F21°C8 mph13 km/h SouthwestMostly Clear
DateLowHighWindDayNight
October 2253°F12°C72°F22°C6 mph9 km/h from SouthwestMostly ClearMostly Clear
October 2351°F10°C79°F26°C4 mph7 km/h from NorthwestClearClear
October 2454°F12°C84°F29°C5 mph7 km/h from SouthwestClearMostly Clear
October 2554°F12°C77°F25°C5 mph8 km/h from SouthwestPartly CloudyPartly Cloudy
October 2653°F12°C74°F23°C4 mph6 km/h from WestPartly CloudyMostly Clear
October 2753°F12°C79°F26°C8 mph13 km/h from NorthMostly ClearClear
October 2859°F15°C82°F28°C10 mph16 km/h from NortheastClearClear

Yes

Low of 51°F11°C, High of 79°F26°C
Wind: 4 mph7 km/h
Precipitation: None

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