Yes

you do need a jacket based on the weather in Rowlett, TX, USA 1 second ago

Why? Because it's pretty chilly!
51°F11°C & Clear

Wind is 4 mph7 km/h from the South, gusting to 8 mph13 km/h
January 16
8pm48°F9°C5 mph9 km/h SouthClear
9pm46°F8°C6 mph9 km/h SouthClear
10pm45°F7°C6 mph10 km/h SouthClear
11pm43°F6°C6 mph10 km/h SouthClear
January 17
12am42°F6°C7 mph11 km/h SouthClear
1am41°F5°C7 mph11 km/h SouthClear
2am41°F5°C8 mph12 km/h SouthClear
3am40°F5°C8 mph14 km/h SouthClear
4am41°F5°C9 mph14 km/h SouthPartly Cloudy
5am41°F5°C9 mph14 km/h SouthPartly Cloudy
6am41°F5°C9 mph15 km/h SouthMostly Cloudy
7am42°F5°C10 mph16 km/h SouthCloudy
DateLowHighWindDayNight
January 1632°F-0°C63°F17°C2 mph4 km/h from SouthwestMostly ClearMostly Clear
January 1740°F5°C60°F16°C16 mph26 km/h from SouthWindyClear
January 1830°F-1°C53°F12°C15 mph24 km/h from NorthMostly ClearWindy
January 1923°F-5°C36°F2°C13 mph21 km/h from NorthClearMostly Clear
January 2020°F-6°C34°F1°C10 mph16 km/h from EastPartly CloudyCloudy
January 2121°F-6°C31°F-1°C8 mph13 km/h from NorthPartly CloudyMostly Clear
January 2218°F-8°C37°F3°C9 mph15 km/h from SouthMostly ClearMostly Clear

Yes

Low of 40°F5°C, High of 60°F16°C
Wind: 16 mph26 km/h
Precipitation: 5% rain

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