Yes

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

Why? Because it's not very warm out.
51°F10°C & Partly Cloudy

Wind is 3 mph5 km/h from the SE, gusting to 8 mph13 km/h
March 29
5am50°F10°C3 mph5 km/h SEPartly Cloudy
6am49°F10°C4 mph6 km/h EPartly Cloudy
7am49°F9°C4 mph6 km/h EMostly Clear
8am48°F9°C4 mph6 km/h EPartly Cloudy
9am48°F9°C4 mph7 km/h EPartly Cloudy
10am47°F8°C4 mph7 km/h EPartly Cloudy
11am49°F10°C5 mph8 km/h SEMostly Cloudy
12pm51°F11°C6 mph9 km/h SEPartly Cloudy
1pm54°F12°C7 mph11 km/h SEPartly Cloudy
2pm56°F13°C8 mph12 km/h SMostly Cloudy
3pm58°F14°C8 mph13 km/h SMostly Cloudy
4pm59°F15°C9 mph14 km/h SMostly Cloudy
DateLowHighWindDayNight
March 2947°F8°C60°F15°C8 mph12 km/h from SMostly CloudyHeavy Rain
March 3047°F8°C56°F13°C5 mph9 km/h from SRainRain
March 3147°F8°C56°F13°C6 mph10 km/h from SERainDrizzle
April 146°F8°C64°F18°C5 mph8 km/h from SWMostly ClearClear
April 250°F10°C73°F23°C4 mph6 km/h from SWClearClear
April 354°F12°C74°F24°C4 mph7 km/h from SWClearMostly Clear
April 452°F11°C64°F18°C7 mph11 km/h from SWPartly CloudyPartly Cloudy

Yes

Low of 46°F8°C, High of 56°F14°C
Wind: 5 mph9 km/h
Precipitation: 80% rain

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