No

you don't need a jacket based on the weather in Irvine (Orange County Great Park), California, United States 1 second ago

78°F25°C & Clear

Wind is 7 mph11 km/h from the W, gusting to 12 mph19 km/h
September 24
5pm78°F26°C7 mph12 km/h WClear
6pm79°F26°C7 mph12 km/h WClear
7pm78°F26°C7 mph11 km/h WClear
8pm76°F25°C6 mph10 km/h WClear
9pm74°F23°C5 mph8 km/h WClear
10pm70°F21°C4 mph6 km/h SWClear
11pm66°F19°C3 mph4 km/h SWClear
September 25
12am64°F18°C3 mph4 km/h SClear
1am63°F17°C3 mph4 km/h SMostly Clear
2am62°F17°C2 mph4 km/h SEMostly Clear
3am61°F16°C2 mph4 km/h SEMostly Clear
4am61°F16°C2 mph4 km/h SEPartly Cloudy
DateLowHighWindDayNight
September 2457°F14°C79°F26°C5 mph7 km/h from WMostly ClearMostly Clear
September 2558°F14°C79°F26°C5 mph7 km/h from WMostly ClearClear
September 2655°F13°C82°F28°C4 mph7 km/h from SWMostly ClearMostly Clear
September 2758°F14°C83°F29°C4 mph7 km/h from SWMostly ClearClear
September 2860°F15°C79°F26°C5 mph8 km/h from SWClearMostly Clear
September 2958°F14°C75°F24°C6 mph10 km/h from SMostly ClearPartly Cloudy
September 3059°F15°C69°F20°C7 mph12 km/h from SWPartly CloudyPartly Cloudy

Yes

Low of 58°F15°C, High of 79°F26°C
Wind: 5 mph7 km/h
Precipitation: None

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