Yes

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

Why? Because it's cool. Pleasantly cool, but cool!
56°F13°C & Clear

Wind is 8 mph13 km/h from the Northwest, gusting to 13 mph21 km/h
April 1
6pm56°F13°C8 mph13 km/h NorthClear
7pm54°F12°C5 mph9 km/h NorthClear
8pm51°F11°C3 mph5 km/h NorthClear
9pm49°F10°C3 mph5 km/h NortheastClear
10pm47°F9°C4 mph6 km/h NortheastClear
11pm46°F8°C4 mph7 km/h NortheastClear
April 2
12am44°F7°C4 mph6 km/h NortheastClear
1am43°F6°C3 mph5 km/h EastClear
2am42°F6°C4 mph6 km/h EastClear
3am42°F5°C5 mph8 km/h EastPartly Cloudy
4am41°F5°C5 mph8 km/h EastMostly Cloudy
5am41°F5°C5 mph8 km/h EastPartly Cloudy
DateLowHighWindDayNight
April 142°F6°C60°F16°C7 mph11 km/h from NorthwestClearMostly Clear
April 240°F4°C62°F16°C10 mph17 km/h from SoutheastMostly CloudyCloudy
April 354°F12°C79°F26°C13 mph21 km/h from SouthwestCloudyDrizzle
April 460°F15°C71°F22°C6 mph10 km/h from NorthDrizzleRain
April 557°F14°C75°F24°C7 mph11 km/h from SoutheastDrizzleCloudy
April 661°F16°C77°F25°C12 mph19 km/h from SouthwestDrizzleDrizzle
April 746°F8°C61°F16°C10 mph16 km/h from NorthwestMostly ClearPartly Cloudy

Yes

Low of 40°F5°C, High of 62°F17°C
Wind: 10 mph17 km/h
Precipitation: None

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