Yes

you do need a jacket based on the weather in Fairfax, VA 22034, USA 1 second ago

Why? Because it's fairly windy outside!
80°F27°C & Cloudy

Wind is 12 mph19 km/h from the East, gusting to 20 mph32 km/h
September 15
5pm79°F26°C11 mph18 km/h EastCloudy
6pm77°F25°C9 mph15 km/h EastCloudy
7pm74°F23°C7 mph11 km/h EastCloudy
8pm72°F22°C5 mph8 km/h EastCloudy
9pm70°F21°C5 mph8 km/h EastCloudy
10pm68°F20°C5 mph8 km/h EastCloudy
11pm67°F19°C5 mph8 km/h NortheastCloudy
September 16
12am65°F18°C5 mph8 km/h NortheastCloudy
1am65°F18°C5 mph8 km/h NortheastCloudy
2am64°F18°C6 mph9 km/h NortheastMostly Cloudy
3am64°F18°C6 mph9 km/h NortheastCloudy
4am63°F17°C6 mph10 km/h NortheastCloudy
DateLowHighWindDayNight
September 1561°F16°C81°F27°C5 mph9 km/h from EastMostly CloudyCloudy
September 1663°F17°C72°F22°C10 mph16 km/h from NortheastDrizzleRain
September 1761°F16°C71°F22°C8 mph13 km/h from NorthRainRain
September 1863°F17°C81°F27°C5 mph7 km/h from NorthwestPartly CloudyMostly Clear
September 1962°F17°C84°F29°C5 mph7 km/h from NorthwestMostly ClearMostly Clear
September 2060°F16°C79°F26°C6 mph10 km/h from EastClearPartly Cloudy
September 2160°F16°C76°F25°C5 mph9 km/h from SoutheastPartly CloudyMostly Clear

No

Low of 63°F17°C, High of 73°F23°C
Wind: 10 mph16 km/h
Precipitation: 42% rain

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