No

you don't need a jacket based on the weather in Rancho Cucamonga, CA, USA 1 second ago

66°F19°C & Mostly Clear

Wind is 10 mph16 km/h from the SW, gusting to 17 mph28 km/h
March 28
7pm65°F18°C11 mph18 km/h SWMostly Clear
8pm63°F17°C12 mph19 km/h SWPartly Cloudy
9pm61°F16°C11 mph17 km/h SWMostly Cloudy
10pm58°F14°C9 mph15 km/h SWMostly Cloudy
11pm56°F13°C8 mph12 km/h SWMostly Cloudy
March 29
12am54°F12°C7 mph10 km/h SWMostly Cloudy
1am52°F11°C6 mph9 km/h SWPartly Cloudy
2am51°F11°C5 mph9 km/h SWPartly Cloudy
3am50°F10°C4 mph7 km/h SWPartly Cloudy
4am49°F9°C3 mph5 km/h SWPartly Cloudy
5am48°F9°C3 mph6 km/h WPartly Cloudy
6am47°F8°C4 mph6 km/h SWPartly Cloudy
DateLowHighWindDayNight
March 2847°F8°C66°F19°C7 mph11 km/h from SWMostly ClearPartly Cloudy
March 2943°F6°C57°F14°C8 mph13 km/h from SWPartly CloudyRain
March 3044°F7°C51°F11°C6 mph10 km/h from SWRainDrizzle
March 3144°F6°C53°F11°C5 mph8 km/h from SERainDrizzle
April 144°F7°C65°F18°C4 mph7 km/h from SWMostly ClearClear
April 249°F9°C73°F23°C6 mph10 km/h from NEClearClear
April 353°F12°C76°F24°C5 mph8 km/h from SWClearClear

Yes

Low of 44°F7°C, High of 57°F14°C
Wind: 8 mph13 km/h
Precipitation: None

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