Yes

you do need a jacket based on the weather in Lewes, DE 19958, USA 1 second ago

Why? Because you're not freezing, but you’ll definitely start complaining if it lasts much longer and it's so windy, you’re practically horizontal just trying to walk!
39°F4°C & Windy

Wind is 18 mph29 km/h from the Northwest, gusting to 29 mph46 km/h
November 29
9pm38°F3°C18 mph30 km/h NorthwestWindy
10pm37°F3°C17 mph28 km/h NorthwestWindy
11pm36°F2°C16 mph26 km/h NorthwestWindy
November 30
12am35°F2°C15 mph25 km/h NorthwestWindy
1am34°F1°C15 mph25 km/h NorthwestWindy
2am34°F1°C15 mph24 km/h NorthwestClear
3am33°F0°C14 mph23 km/h WestClear
4am32°F0°C14 mph23 km/h WestClear
5am32°F-0°C14 mph22 km/h WestClear
6am31°F-0°C13 mph22 km/h WestClear
7am31°F-1°C13 mph21 km/h WestClear
8am32°F-0°C14 mph22 km/h WestClear
DateLowHighWindDayNight
November 2935°F2°C50°F10°C8 mph13 km/h from WestMostly ClearWindy
November 3031°F-1°C40°F4°C16 mph25 km/h from WestWindyPartly Cloudy
December 130°F-1°C44°F6°C8 mph13 km/h from WestPartly CloudyPartly Cloudy
December 230°F-1°C40°F4°C13 mph21 km/h from NorthwestClearClear
December 329°F-1°C41°F5°C14 mph23 km/h from NorthwestMostly ClearMostly Clear
December 429°F-2°C41°F5°C11 mph18 km/h from SouthwestMostly CloudyMostly Cloudy
December 537°F3°C47°F9°C18 mph29 km/h from WestWindyWindy

Yes

Low of 31°F-1°C, High of 39°F4°C
Wind: 16 mph25 km/h
Precipitation: None

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