Yes

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

Why? Because it's not very warm out!
57°F14°C & Partly Cloudy

Wind is 2 mph4 km/h from the Southeast, gusting to 3 mph5 km/h
November 1
12pm57°F14°C3 mph5 km/h EastPartly Cloudy
1pm58°F14°C2 mph4 km/h EastMostly Cloudy
2pm58°F14°C2 mph3 km/h EastMostly Cloudy
3pm59°F15°C1 mph2 km/h EastMostly Cloudy
4pm61°F16°C1 mph1 km/h SoutheastPartly Cloudy
5pm64°F18°C2 mph3 km/h WestPartly Cloudy
6pm68°F20°C2 mph4 km/h WestMostly Clear
7pm70°F21°C3 mph5 km/h WestMostly Clear
8pm74°F23°C4 mph7 km/h WestMostly Clear
9pm75°F24°C5 mph9 km/h WestMostly Clear
10pm75°F24°C6 mph9 km/h WestMostly Clear
11pm74°F23°C6 mph9 km/h SouthwestClear
DateLowHighWindDayNight
November 157°F14°C75°F24°C4 mph6 km/h from WestMostly ClearPartly Cloudy
November 256°F14°C75°F24°C4 mph6 km/h from SouthwestMostly ClearPartly Cloudy
November 356°F13°C74°F23°C4 mph6 km/h from SouthwestPartly CloudyPartly Cloudy
November 454°F12°C74°F23°C4 mph6 km/h from SouthwestMostly ClearPartly Cloudy
November 556°F13°C71°F22°C4 mph7 km/h from WestPartly CloudyMostly Clear
November 654°F12°C72°F22°C4 mph6 km/h from SouthwestMostly ClearClear
November 756°F13°C77°F25°C3 mph6 km/h from WestClearClear

Yes

Low of 56°F14°C, High of 74°F24°C
Wind: 4 mph6 km/h
Precipitation: None

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