Yes

you do need a jacket based on the weather in Shelbyville, TN, USA 1 second ago

Why? Because the rain is just enough to ruin your hairstyle but not your mood and there's a refreshing nip in the air and it's really really huffing out there!
48°F9°C & Rain

Wind is 17 mph27 km/h from the Southeast, gusting to 36 mph58 km/h
December 27
7am48°F9°C18 mph29 km/h SoutheastDrizzle
8am49°F9°C19 mph31 km/h SoutheastDrizzle
9am49°F10°C20 mph32 km/h SoutheastRain
10am50°F10°C15 mph24 km/h SouthRain
11am50°F10°C12 mph20 km/h SouthRain
12pm52°F11°C13 mph21 km/h SouthDrizzle
1pm53°F12°C14 mph22 km/h SouthRain
2pm54°F12°C14 mph23 km/h SouthDrizzle
3pm55°F13°C14 mph22 km/h SouthDrizzle
4pm55°F13°C14 mph22 km/h SouthDrizzle
5pm54°F12°C14 mph22 km/h SouthDrizzle
6pm54°F12°C13 mph21 km/h SouthRain
DateLowHighWindDayNight
December 2747°F9°C55°F13°C14 mph23 km/h from SouthRainCloudy
December 2855°F13°C65°F18°C8 mph14 km/h from SouthRainRain
December 2948°F9°C63°F17°C11 mph18 km/h from WestDrizzlePartly Cloudy
December 3044°F7°C62°F16°C7 mph11 km/h from SouthPartly CloudyPartly Cloudy
December 3142°F6°C59°F15°C14 mph23 km/h from WestDrizzleCloudy
January 130°F-1°C43°F6°C8 mph13 km/h from NorthwestMostly CloudyMostly Clear
January 227°F-3°C41°F5°C9 mph14 km/h from NorthwestMostly ClearClear

Yes

Low of 55°F13°C, High of 65°F19°C
Wind: 8 mph14 km/h
Precipitation: 51% rain

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