Yes

you do need a jacket based on the weather in Las Vegas, NV, USA 2 minutes ago

Why? Because it's cool enough your breath is visible, but your nose isn’t red yet!
40°F4°C & Cloudy

Wind is 7 mph11 km/h from the Northwest, gusting to 16 mph25 km/h
January 27
9am40°F4°C7 mph11 km/h NorthwestCloudy
10am40°F5°C9 mph15 km/h NorthwestMostly Cloudy
11am43°F6°C8 mph12 km/h NorthwestPartly Cloudy
12pm46°F8°C7 mph12 km/h NorthPartly Cloudy
1pm49°F10°C7 mph12 km/h NortheastPartly Cloudy
2pm52°F11°C10 mph16 km/h NortheastPartly Cloudy
3pm53°F12°C9 mph14 km/h NortheastMostly Cloudy
4pm54°F12°C6 mph9 km/h NortheastPartly Cloudy
5pm54°F12°C5 mph8 km/h EastMostly Cloudy
6pm55°F13°C4 mph7 km/h EastMostly Cloudy
7pm54°F12°C3 mph5 km/h SoutheastMostly Cloudy
8pm51°F10°C3 mph4 km/h SouthMostly Cloudy
DateLowHighWindDayNight
January 2738°F3°C55°F13°C6 mph9 km/h from NortheastPartly CloudyPartly Cloudy
January 2834°F1°C54°F12°C3 mph4 km/h from SoutheastMostly CloudyPartly Cloudy
January 2935°F2°C58°F15°C3 mph5 km/h from SoutheastClearClear
January 3033°F1°C59°F15°C2 mph4 km/h from EastClearClear
January 3133°F1°C57°F14°C3 mph4 km/h from EastMostly CloudyMostly Cloudy
February 136°F2°C62°F17°C3 mph4 km/h from EastMostly CloudyMostly Cloudy
February 243°F6°C67°F19°C3 mph4 km/h from EastMostly ClearMostly Clear

Yes

Low of 34°F1°C, High of 54°F12°C
Wind: 3 mph4 km/h
Precipitation: None

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