Yes

you do need a jacket based on the weather in Washington, DC, USA 3 minutes ago

Why? Because just cool enough for a jacket, but not warm enough to ditch it!
57°F14°C & Clear

Wind is 6 mph9 km/h from the Northwest, gusting to 13 mph21 km/h
November 6
10pm55°F13°C4 mph7 km/h NorthwestClear
11pm51°F11°C4 mph7 km/h NorthClear
November 7
12am48°F9°C4 mph6 km/h NorthwestClear
1am45°F7°C3 mph6 km/h NorthwestClear
2am43°F6°C3 mph6 km/h NorthClear
3am42°F6°C3 mph5 km/h NorthClear
4am41°F5°C3 mph5 km/h NortheastMostly Clear
5am41°F5°C2 mph3 km/h SoutheastMostly Clear
6am41°F5°C2 mph4 km/h SouthMostly Clear
7am40°F4°C2 mph4 km/h SouthPartly Cloudy
8am40°F4°C3 mph5 km/h SoutheastMostly Cloudy
9am39°F4°C3 mph5 km/h SouthMostly Cloudy
DateLowHighWindDayNight
November 641°F5°C60°F16°C6 mph10 km/h from NorthwestClearMostly Clear
November 738°F3°C63°F17°C11 mph18 km/h from SouthMostly CloudyRain
November 852°F11°C66°F19°C6 mph9 km/h from NorthwestMostly ClearPartly Cloudy
November 949°F9°C64°F18°C6 mph10 km/h from SouthDrizzleRain
November 1033°F1°C49°F9°C10 mph16 km/h from NorthwestMostly ClearPartly Cloudy
November 1130°F-1°C44°F7°C12 mph20 km/h from WestClearPartly Cloudy
November 1235°F1°C56°F13°C10 mph16 km/h from SouthwestMostly ClearPartly Cloudy

Yes

Low of 38°F4°C, High of 63°F17°C
Wind: 11 mph18 km/h
Precipitation: None

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