Yes

you do need a jacket based on the weather in Orem, UT, USA 1 second ago

Why? Because the temperature has dropped below freezing!
24°F-5°C & Clear

Wind is 2 mph3 km/h from the East, gusting to 4 mph7 km/h
January 10
3am24°F-5°C2 mph3 km/h EastClear
4am23°F-5°C4 mph7 km/h SoutheastMostly Clear
5am22°F-5°C4 mph6 km/h SoutheastMostly Clear
6am22°F-6°C4 mph6 km/h SoutheastMostly Clear
7am21°F-6°C4 mph6 km/h SoutheastPartly Cloudy
8am22°F-5°C4 mph6 km/h SoutheastMostly Cloudy
9am22°F-5°C4 mph6 km/h SoutheastMostly Cloudy
10am20°F-7°C3 mph5 km/h EastPartly Cloudy
11am21°F-6°C4 mph6 km/h EastPartly Cloudy
12pm24°F-4°C3 mph5 km/h SoutheastPartly Cloudy
1pm27°F-3°C4 mph6 km/h SoutheastPartly Cloudy
2pm30°F-1°C3 mph5 km/h SouthMostly Clear
DateLowHighWindDayNight
January 1020°F-7°C34°F1°C3 mph5 km/h from SoutheastPartly CloudyCloudy
January 1123°F-5°C31°F-1°C7 mph12 km/h from NorthwestMostly CloudyMostly Cloudy
January 1220°F-7°C28°F-2°C4 mph6 km/h from NorthwestMostly CloudyMostly Cloudy
January 1314°F-10°C28°F-2°C3 mph4 km/h from NorthwestPartly CloudyPartly Cloudy
January 1413°F-11°C28°F-2°C2 mph4 km/h from SouthwestMostly ClearClear
January 1517°F-8°C33°F1°C2 mph3 km/h from SouthClearClear
January 1622°F-5°C39°F4°C2 mph3 km/h from SouthMostly ClearPartly Cloudy

Yes

Low of 23°F-5°C, High of 31°F-1°C
Wind: 7 mph12 km/h
Precipitation: None

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