Yes

you do need a jacket based on the weather in Manassas, VA 20109, USA 41 seconds ago

Why? Because it's cool. Pleasantly cool, but cool!
59°F15°C & Cloudy

Wind is 4 mph6 km/h from the North, gusting to 9 mph14 km/h
October 25
6pm60°F15°C4 mph6 km/h NorthCloudy
7pm60°F15°C4 mph7 km/h NorthwestCloudy
8pm59°F15°C4 mph7 km/h NorthCloudy
9pm58°F14°C4 mph6 km/h NorthCloudy
10pm55°F13°C3 mph4 km/h NorthCloudy
11pm51°F11°C3 mph5 km/h NortheastCloudy
October 26
12am49°F9°C2 mph4 km/h NortheastCloudy
1am48°F9°C2 mph3 km/h NortheastCloudy
2am47°F9°C2 mph3 km/h NorthCloudy
3am46°F8°C2 mph2 km/h NorthwestMostly Cloudy
4am45°F7°C2 mph3 km/h NorthwestMostly Cloudy
5am43°F6°C2 mph3 km/h NorthwestPartly Cloudy
DateLowHighWindDayNight
October 2532°F0°C60°F15°C3 mph5 km/h from NorthMostly CloudyMostly Cloudy
October 2638°F3°C60°F16°C2 mph4 km/h from NortheastMostly CloudyMostly Cloudy
October 2739°F4°C60°F16°C6 mph10 km/h from NortheastPartly CloudyMostly Cloudy
October 2840°F5°C57°F14°C9 mph15 km/h from NortheastMostly CloudyMostly Cloudy
October 2944°F6°C57°F14°C8 mph13 km/h from NortheastDrizzleRain
October 3048°F9°C58°F14°C11 mph18 km/h from NorthRainDrizzle
October 3143°F6°C58°F15°C11 mph17 km/h from WestPartly CloudyMostly Clear

Yes

Low of 37°F3°C, High of 60°F16°C
Wind: 2 mph4 km/h
Precipitation: None

Support This Page