Yes

you do need a jacket based on the weather in Santa Clarita, CA, USA 1 second ago

Why? Because just cool enough for a jacket, but not warm enough to ditch it!
54°F12°C & Clear

Wind is 1 mph2 km/h from the East, gusting to 2 mph3 km/h
October 25
2pm54°F12°C2 mph3 km/h EastClear
3pm55°F13°C2 mph3 km/h NorthClear
4pm60°F16°C2 mph2 km/h NortheastClear
5pm67°F19°C1 mph2 km/h SouthClear
6pm71°F22°C2 mph3 km/h SouthwestClear
7pm75°F24°C4 mph7 km/h SouthMostly Clear
8pm77°F25°C7 mph11 km/h SouthMostly Cloudy
9pm78°F25°C7 mph11 km/h SouthMostly Cloudy
10pm78°F25°C7 mph11 km/h SouthwestPartly Cloudy
11pm77°F25°C6 mph10 km/h SouthwestMostly Clear
October 26
12am75°F24°C5 mph8 km/h SouthwestMostly Cloudy
1am72°F22°C3 mph5 km/h SouthwestMostly Cloudy
DateLowHighWindDayNight
October 2552°F11°C78°F26°C4 mph6 km/h from SouthwestMostly ClearPartly Cloudy
October 2653°F12°C79°F26°C4 mph6 km/h from NorthwestMostly ClearClear
October 2754°F12°C83°F28°C7 mph11 km/h from NorthClearClear
October 2862°F16°C87°F31°C10 mph16 km/h from NortheastClearClear
October 2963°F17°C88°F31°C7 mph11 km/h from NorthClearClear
October 3059°F15°C85°F30°C4 mph7 km/h from SouthwestMostly ClearMostly Clear
October 3157°F14°C84°F29°C6 mph9 km/h from NortheastClearClear

Yes

Low of 53°F12°C, High of 79°F26°C
Wind: 4 mph6 km/h
Precipitation: None

Support This Page