Yes

you do need a jacket based on the weather in Washington, DC, USA 4 minutes ago

Why? Because it's pretty chilly!
52°F11°C & Clear

Wind is 8 mph13 km/h from the West, gusting to 18 mph29 km/h
October 31
5am51°F10°C9 mph14 km/h WestClear
6am50°F10°C9 mph15 km/h WestClear
7am49°F10°C10 mph16 km/h WestMostly Clear
8am49°F9°C10 mph17 km/h WestMostly Clear
9am48°F9°C10 mph16 km/h WestMostly Clear
10am47°F8°C9 mph15 km/h WestMostly Clear
11am47°F8°C11 mph17 km/h WestMostly Clear
12pm47°F8°C10 mph16 km/h WestClear
1pm48°F9°C12 mph19 km/h WestClear
2pm51°F10°C14 mph23 km/h WestClear
3pm53°F12°C15 mph24 km/h WestClear
4pm56°F13°C16 mph26 km/h WestWindy
DateLowHighWindDayNight
October 3147°F8°C59°F15°C14 mph23 km/h from WestClearMostly Clear
November 144°F7°C60°F16°C7 mph12 km/h from WestPartly CloudyMostly Cloudy
November 243°F6°C61°F16°C3 mph4 km/h from SoutheastPartly CloudyMostly Cloudy
November 344°F7°C59°F15°C4 mph6 km/h from NorthwestPartly CloudyMostly Clear
November 444°F7°C60°F15°C9 mph15 km/h from NorthwestClearMostly Clear
November 541°F5°C63°F17°C8 mph13 km/h from SouthPartly CloudyMostly Clear
November 645°F7°C60°F15°C12 mph20 km/h from NorthwestMostly ClearClear

Yes

Low of 44°F7°C, High of 61°F16°C
Wind: 7 mph12 km/h
Precipitation: None

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