Yes

you do need a jacket based on the weather in Knoxville, TN, USA 20 seconds ago

Why? Because it's not very warm out!
55°F13°C & Cloudy

Wind is 1 mph2 km/h from the North, gusting to 2 mph4 km/h
November 8
1pm56°F13°C2 mph3 km/h NortheastCloudy
2pm57°F14°C2 mph3 km/h EastCloudy
3pm59°F15°C1 mph2 km/h SouthCloudy
4pm62°F16°C3 mph4 km/h WestCloudy
5pm63°F17°C3 mph4 km/h WestCloudy
6pm65°F18°C2 mph4 km/h WestMostly Cloudy
7pm67°F19°C3 mph5 km/h WestMostly Clear
8pm67°F20°C3 mph5 km/h WestMostly Clear
9pm67°F19°C3 mph5 km/h WestMostly Clear
10pm65°F18°C1 mph2 km/h WestClear
11pm61°F16°C1 mph2 km/h SoutheastClear
November 9
12am59°F15°C2 mph3 km/h SoutheastClear
DateLowHighWindDayNight
November 853°F12°C67°F20°C2 mph4 km/h from WestPartly CloudyPartly Cloudy
November 938°F3°C59°F15°C10 mph16 km/h from WestDrizzleMostly Cloudy
November 1027°F-3°C38°F3°C10 mph17 km/h from WestMostly CloudyMostly Clear
November 1123°F-5°C45°F7°C9 mph14 km/h from SouthwestMostly ClearMostly Clear
November 1237°F3°C59°F15°C11 mph18 km/h from SouthwestClearClear
November 1338°F4°C58°F15°C3 mph5 km/h from WestMostly ClearClear
November 1437°F3°C61°F16°C2 mph4 km/h from SouthwestMostly ClearMostly Clear

Yes

Low of 37°F3°C, High of 59°F15°C
Wind: 10 mph16 km/h
Precipitation: 35% rain

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