Yes

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

Why? Because it's quite chilly.
42°F5°C & Clear

Wind is 7 mph12 km/h from the NW, gusting to 18 mph29 km/h
March 29
3am41°F5°C7 mph11 km/h NWClear
4am39°F4°C5 mph9 km/h NWClear
5am37°F3°C5 mph8 km/h NWClear
6am36°F2°C5 mph8 km/h NWMostly Clear
7am37°F3°C5 mph8 km/h WPartly Cloudy
8am39°F4°C5 mph8 km/h WMostly Clear
9am43°F6°C5 mph9 km/h WPartly Cloudy
10am47°F8°C7 mph12 km/h NWPartly Cloudy
11am50°F10°C12 mph19 km/h NWMostly Cloudy
12pm53°F12°C14 mph22 km/h NWMostly Clear
1pm56°F13°C15 mph24 km/h NWMostly Clear
2pm57°F14°C15 mph25 km/h NWWindy
DateLowHighWindDayNight
March 2936°F2°C60°F15°C12 mph19 km/h from NWMostly ClearClear
March 3037°F3°C63°F17°C5 mph8 km/h from SMostly CloudyPartly Cloudy
March 3149°F10°C68°F20°C5 mph9 km/h from NWMostly CloudyDrizzle
April 147°F8°C59°F15°C6 mph10 km/h from ERainRain
April 247°F8°C61°F16°C6 mph9 km/h from SERainRain
April 342°F6°C56°F13°C10 mph16 km/h from NWRainPartly Cloudy
April 438°F4°C51°F11°C17 mph28 km/h from NWWindyMostly Clear

Yes

Low of 37°F3°C, High of 63°F17°C
Wind: 5 mph8 km/h
Precipitation: None

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