Yes

you do need a jacket based on the weather in Gillette, WY, USA 1 second ago

Why? Because your nose hairs will turn into tiny icicles!
30°F-1°C & Clear

Wind is 6 mph9 km/h from the Southeast, gusting to 10 mph16 km/h
October 13
12pm30°F-1°C8 mph12 km/h SoutheastClear
1pm31°F-0°C9 mph15 km/h SoutheastClear
2pm34°F1°C11 mph18 km/h SoutheastClear
3pm39°F4°C16 mph26 km/h SoutheastWindy
4pm44°F7°C18 mph29 km/h SoutheastWindy
5pm49°F10°C18 mph29 km/h SoutheastWindy
6pm53°F12°C17 mph28 km/h SoutheastWindy
7pm56°F13°C17 mph28 km/h SoutheastWindy
8pm59°F15°C18 mph29 km/h SoutheastWindy
9pm61°F16°C18 mph30 km/h SoutheastWindy
10pm62°F17°C19 mph31 km/h SoutheastWindy
11pm61°F16°C18 mph29 km/h SoutheastWindy
DateLowHighWindDayNight
October 1330°F-1°C62°F17°C17 mph27 km/h from SoutheastWindyWindy
October 1443°F6°C64°F18°C11 mph18 km/h from SouthMostly ClearPartly Cloudy
October 1547°F8°C63°F17°C10 mph16 km/h from SoutheastRainDrizzle
October 1641°F5°C51°F11°C12 mph20 km/h from NorthwestDrizzleMostly Cloudy
October 1739°F4°C55°F13°C15 mph25 km/h from NorthwestWindyPartly Cloudy
October 1834°F1°C49°F9°C14 mph22 km/h from NorthwestMostly ClearClear
October 1935°F1°C65°F18°C11 mph18 km/h from SouthMostly ClearWindy

Yes

Low of 43°F6°C, High of 64°F18°C
Wind: 11 mph18 km/h
Precipitation: None

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