Yes

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

Why? Because it's cold. simple as that and it's fairly windy outside!
39°F4°C & Cloudy

Wind is 10 mph16 km/h from the N, gusting to 20 mph32 km/h
October 18
2pm40°F4°C11 mph17 km/h NRain
3pm42°F5°C11 mph17 km/h NCloudy
4pm43°F6°C10 mph17 km/h NCloudy
5pm44°F7°C10 mph16 km/h NECloudy
6pm45°F7°C10 mph16 km/h NECloudy
7pm46°F8°C9 mph15 km/h NECloudy
8pm46°F8°C9 mph14 km/h NEMostly Cloudy
9pm45°F7°C7 mph11 km/h NMostly Cloudy
10pm44°F6°C6 mph10 km/h NPartly Cloudy
11pm43°F6°C6 mph10 km/h NPartly Cloudy
October 19
12am42°F6°C6 mph10 km/h NPartly Cloudy
1am42°F5°C6 mph9 km/h NMostly Clear
DateLowHighWindDayNight
October 1833°F1°C46°F8°C9 mph15 km/h from NRainMostly Clear
October 1935°F2°C57°F14°C4 mph6 km/h from NClearMostly Clear
October 2040°F4°C60°F15°C3 mph5 km/h from SWPartly CloudyMostly Clear
October 2141°F5°C66°F19°C5 mph8 km/h from SMostly ClearClear
October 2244°F7°C70°F21°C4 mph7 km/h from SWClearClear
October 2348°F9°C71°F22°C4 mph6 km/h from WClearClear
October 2446°F8°C67°F20°C2 mph4 km/h from NMostly ClearPartly Cloudy

Yes

Low of 36°F2°C, High of 57°F14°C
Wind: 4 mph6 km/h
Precipitation: None

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