Yes

you do need a jacket based on the weather in Vienna, VA 22180, USA 1 second ago

Why? Because it's quite chilly!
47°F8°C & Mostly Cloudy

Wind is 7 mph11 km/h from the South, gusting to 15 mph24 km/h
March 14
10pm46°F8°C7 mph12 km/h SoutheastCloudy
11pm45°F7°C7 mph12 km/h SouthCloudy
March 15
12am45°F7°C7 mph12 km/h SouthCloudy
1am45°F7°C7 mph11 km/h SouthCloudy
2am44°F7°C7 mph11 km/h SoutheastCloudy
3am44°F7°C7 mph11 km/h SoutheastCloudy
4am44°F7°C6 mph10 km/h SoutheastCloudy
5am44°F7°C6 mph10 km/h SoutheastCloudy
6am44°F7°C6 mph10 km/h SoutheastCloudy
7am44°F6°C6 mph10 km/h SoutheastCloudy
8am44°F7°C6 mph10 km/h SoutheastCloudy
9am45°F7°C7 mph11 km/h SoutheastCloudy
DateLowHighWindDayNight
March 1440°F4°C53°F12°C2 mph4 km/h from SoutheastMostly CloudyCloudy
March 1544°F6°C63°F17°C8 mph13 km/h from SoutheastCloudyMostly Cloudy
March 1657°F14°C68°F20°C16 mph25 km/h from SouthRainDrizzle
March 1742°F5°C59°F15°C13 mph21 km/h from NorthwestMostly CloudyMostly Clear
March 1836°F2°C63°F17°C6 mph9 km/h from NorthwestClearClear
March 1943°F6°C67°F20°C7 mph11 km/h from SoutheastMostly CloudyMostly Cloudy
March 2043°F6°C58°F15°C12 mph20 km/h from SouthwestRainRain

Yes

Low of 44°F7°C, High of 64°F18°C
Wind: 8 mph13 km/h
Precipitation: None

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