Yes

you do need a jacket based on the weather in Reston, VA, USA 9 minutes ago

Why? Because a little drizzle out!
70°F21°C & Drizzle

Wind is 6 mph10 km/h from the East, gusting to 13 mph21 km/h
June 15
2am70°F21°C7 mph11 km/h EastCloudy
3am69°F21°C8 mph13 km/h EastCloudy
4am68°F20°C8 mph14 km/h EastCloudy
5am67°F19°C9 mph14 km/h EastCloudy
6am66°F19°C9 mph14 km/h EastCloudy
7am66°F19°C8 mph13 km/h EastCloudy
8am66°F19°C7 mph11 km/h EastCloudy
9am67°F19°C7 mph12 km/h EastCloudy
10am68°F20°C7 mph12 km/h EastCloudy
11am69°F20°C7 mph11 km/h EastCloudy
12pm70°F21°C7 mph11 km/h EastCloudy
1pm71°F22°C7 mph11 km/h EastCloudy
DateLowHighWindDayNight
June 1566°F19°C75°F24°C7 mph11 km/h from EastDrizzleRain
June 1663°F17°C73°F23°C5 mph8 km/h from NortheastRainCloudy
June 1765°F18°C80°F26°C6 mph10 km/h from SoutheastDrizzleRain
June 1870°F21°C89°F31°C5 mph7 km/h from WestPartly CloudyMostly Clear
June 1971°F22°C86°F30°C7 mph11 km/h from SouthwestRainRain
June 2066°F19°C84°F29°C8 mph13 km/h from NorthwestMostly ClearMostly Clear
June 2170°F21°C88°F31°C4 mph6 km/h from SouthwestMostly ClearClear

No

Low of 63°F17°C, High of 73°F23°C
Wind: 5 mph8 km/h
Precipitation: 53% rain

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