Yes

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

Why? Because the cold's there, but it's just a reminder, not an invasion!
44°F7°C & Clear

Wind is 4 mph6 km/h from the Northeast, gusting to 9 mph15 km/h
November 2
1pm44°F7°C3 mph5 km/h NortheastClear
2pm47°F8°C3 mph4 km/h NortheastClear
3pm51°F11°C3 mph5 km/h EastClear
4pm56°F13°C3 mph5 km/h SoutheastClear
5pm60°F16°C3 mph5 km/h SoutheastClear
6pm63°F17°C4 mph6 km/h SouthClear
7pm66°F19°C4 mph7 km/h SouthClear
8pm67°F20°C4 mph6 km/h SouthClear
9pm68°F20°C4 mph6 km/h SouthClear
10pm68°F20°C4 mph7 km/h SouthClear
11pm66°F19°C5 mph7 km/h SouthClear
November 3
12am62°F17°C5 mph8 km/h SoutheastClear
DateLowHighWindDayNight
November 244°F7°C68°F20°C4 mph6 km/h from SoutheastClearClear
November 350°F10°C76°F25°C8 mph12 km/h from SouthClearClear
November 452°F11°C76°F25°C10 mph16 km/h from SouthClearClear
November 557°F14°C81°F27°C9 mph15 km/h from SouthClearMostly Clear
November 661°F16°C81°F27°C12 mph20 km/h from SouthMostly ClearClear
November 761°F16°C80°F26°C8 mph13 km/h from NorthwestClearClear
November 857°F14°C79°F26°C6 mph9 km/h from SouthClearClear

Yes

Low of 50°F10°C, High of 76°F25°C
Wind: 8 mph12 km/h
Precipitation: None

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