Yes

you do need a jacket based on the weather in Kennesaw, GA, USA 1 second ago

Why? Because it's not very warm out!
51°F11°C & Clear

Wind is 4 mph6 km/h from the Southeast, gusting to 8 mph13 km/h
October 21
6am51°F10°C4 mph6 km/h SouthClear
7am50°F10°C4 mph6 km/h SouthClear
8am49°F9°C3 mph5 km/h SouthClear
9am48°F9°C2 mph3 km/h SouthClear
10am47°F8°C4 mph6 km/h SouthClear
11am46°F8°C3 mph5 km/h SouthwestClear
12pm47°F8°C3 mph5 km/h SouthClear
1pm52°F11°C4 mph6 km/h SouthClear
2pm59°F15°C4 mph7 km/h SouthwestMostly Clear
3pm64°F18°C5 mph8 km/h SouthwestClear
4pm69°F21°C7 mph11 km/h WestMostly Clear
5pm72°F22°C8 mph13 km/h WestMostly Clear
DateLowHighWindDayNight
October 2146°F8°C75°F24°C7 mph12 km/h from WestMostly ClearMostly Clear
October 2248°F9°C67°F20°C8 mph13 km/h from NorthwestClearClear
October 2345°F7°C71°F22°C5 mph9 km/h from WestClearMostly Clear
October 2447°F8°C71°F22°C3 mph5 km/h from NorthMostly ClearPartly Cloudy
October 2549°F9°C70°F21°C7 mph12 km/h from SoutheastMostly CloudyCloudy
October 2652°F11°C66°F19°C10 mph16 km/h from EastCloudyRain
October 2754°F12°C66°F19°C10 mph15 km/h from EastDrizzleDrizzle

Yes

Low of 48°F9°C, High of 67°F20°C
Wind: 8 mph13 km/h
Precipitation: None

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