Yes

you do need a jacket based on the weather in Washington, DC, USA 1 second ago

Why? Because it's not very warm out.
56°F13°C & Cloudy

Wind is 2 mph3 km/h from the SW, gusting to 4 mph7 km/h
December 2
1pm56°F14°C2 mph4 km/h SWCloudy
2pm58°F14°C2 mph2 km/h SWCloudy
3pm58°F15°C1 mph2 km/h SECloudy
4pm58°F14°C2 mph4 km/h SECloudy
5pm56°F13°C2 mph4 km/h SECloudy
6pm55°F13°C3 mph5 km/h SECloudy
7pm54°F12°C3 mph5 km/h SECloudy
8pm53°F12°C3 mph5 km/h ECloudy
9pm52°F11°C3 mph5 km/h ECloudy
10pm52°F11°C3 mph5 km/h EDrizzle
11pm51°F11°C3 mph5 km/h ECloudy
December 3
12am51°F11°C3 mph5 km/h ECloudy
DateLowHighWindDayNight
December 246°F8°C58°F15°C2 mph3 km/h from SCloudyRain
December 350°F10°C58°F15°C4 mph7 km/h from EDrizzlePartly Cloudy
December 441°F5°C53°F12°C6 mph9 km/h from WMostly CloudyMostly Clear
December 537°F3°C48°F9°C4 mph6 km/h from SWMostly CloudyDrizzle
December 635°F1°C45°F7°C8 mph14 km/h from NWMostly CloudyMostly Clear
December 730°F-1°C46°F8°C6 mph9 km/h from WPartly CloudyPartly Cloudy
December 836°F2°C57°F14°C6 mph10 km/h from SWMostly CloudyPartly Cloudy

Yes

Low of 50°F10°C, High of 58°F15°C
Wind: 4 mph7 km/h
Precipitation: 83% rain

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