Yes

you do need a jacket based on the weather in Lexington, KY, USA 1 second ago

Why? Because it's cold. simple as that.
38°F3°C & Clear

Wind is 7 mph11 km/h from the NE, gusting to 16 mph25 km/h
April 25
7am37°F3°C8 mph12 km/h NEClear
8am39°F4°C8 mph13 km/h NEClear
9am43°F6°C8 mph14 km/h NEClear
10am47°F8°C8 mph12 km/h NEClear
11am51°F11°C6 mph10 km/h NEClear
12pm55°F13°C6 mph9 km/h NEClear
1pm58°F14°C5 mph8 km/h NEMostly Clear
2pm60°F16°C4 mph7 km/h NEMostly Clear
3pm62°F17°C5 mph7 km/h NEMostly Clear
4pm64°F18°C5 mph8 km/h NEMostly Clear
5pm65°F18°C5 mph9 km/h NEMostly Clear
6pm64°F18°C6 mph9 km/h NEMostly Clear
DateLowHighWindDayNight
April 2537°F3°C65°F18°C6 mph10 km/h from NEMostly ClearPartly Cloudy
April 2643°F6°C72°F22°C9 mph15 km/h from SEMostly CloudyMostly Cloudy
April 2761°F16°C78°F26°C15 mph24 km/h from SMostly CloudyMostly Clear
April 2861°F16°C82°F28°C11 mph18 km/h from SMostly ClearMostly Clear
April 2962°F17°C83°F28°C12 mph19 km/h from SWPartly CloudyRain
April 3062°F17°C75°F24°C7 mph11 km/h from WDrizzleMostly Clear
May 157°F14°C83°F28°C3 mph5 km/h from SWPartly CloudyMostly Clear

Yes

Low of 44°F7°C, High of 72°F22°C
Wind: 9 mph15 km/h
Precipitation: 21% rain

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