Yes

you do need a jacket based on the weather in Las Vegas, NV, USA 1 second ago

Why? Because it's pretty chilly.
59°F15°C & Mostly Clear

Wind is 4 mph6 km/h from the S, gusting to 11 mph17 km/h
April 26
9am59°F15°C4 mph6 km/h SPartly Cloudy
10am60°F16°C3 mph5 km/h SWPartly Cloudy
11am63°F17°C5 mph9 km/h NWPartly Cloudy
12pm64°F18°C6 mph9 km/h NMostly Cloudy
1pm65°F19°C7 mph11 km/h NCloudy
2pm63°F17°C9 mph15 km/h NCloudy
3pm60°F15°C9 mph15 km/h NDrizzle
4pm57°F14°C9 mph15 km/h WRain
5pm59°F15°C7 mph12 km/h SWCloudy
6pm61°F16°C8 mph12 km/h SWMostly Cloudy
7pm63°F17°C8 mph12 km/h SWCloudy
8pm64°F18°C9 mph14 km/h SCloudy
DateLowHighWindDayNight
April 2657°F14°C67°F20°C7 mph12 km/h from WRainMostly Cloudy
April 2755°F13°C78°F26°C10 mph16 km/h from NWClearMostly Clear
April 2858°F15°C82°F28°C3 mph5 km/h from SEClearClear
April 2961°F16°C89°F31°C6 mph10 km/h from SClearClear
April 3063°F17°C91°F33°C5 mph9 km/h from SClearClear
May 165°F18°C91°F33°C5 mph9 km/h from SEClearClear
May 265°F18°C91°F33°C6 mph10 km/h from SEClearClear

Yes

Low of 55°F13°C, High of 78°F26°C
Wind: 10 mph16 km/h
Precipitation: None

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