Yes

you do need a jacket based on the weather in Phoenix, MD 21131, USA 1 second ago

Why? Because sorry, it's too cool for just a hoodie!
51°F11°C & Mostly Clear

Wind is 3 mph5 km/h from the Southeast, gusting to 6 mph9 km/h
October 11
12am51°F11°C3 mph5 km/h SoutheastMostly Clear
1am50°F10°C3 mph6 km/h EastPartly Cloudy
2am50°F10°C3 mph5 km/h EastPartly Cloudy
3am49°F10°C4 mph6 km/h NortheastPartly Cloudy
4am49°F10°C4 mph6 km/h NortheastCloudy
5am51°F11°C4 mph7 km/h NortheastCloudy
6am51°F11°C4 mph7 km/h NortheastCloudy
7am51°F10°C4 mph6 km/h NortheastMostly Cloudy
8am52°F11°C5 mph7 km/h NortheastMostly Cloudy
9am56°F13°C5 mph8 km/h NortheastMostly Cloudy
10am59°F15°C6 mph9 km/h NortheastMostly Cloudy
11am62°F17°C6 mph10 km/h EastMostly Cloudy
DateLowHighWindDayNight
October 1040°F5°C62°F17°C4 mph6 km/h from SoutheastPartly CloudyPartly Cloudy
October 1149°F10°C69°F21°C6 mph10 km/h from EastDrizzleDrizzle
October 1257°F14°C66°F19°C13 mph20 km/h from NortheastRainRain
October 1355°F13°C65°F18°C12 mph19 km/h from NorthRainDrizzle
October 1453°F12°C69°F21°C11 mph17 km/h from NorthMostly ClearClear
October 1553°F12°C67°F19°C10 mph16 km/h from NorthwestPartly CloudyRain
October 1645°F7°C57°F14°C11 mph18 km/h from NorthwestMostly ClearPartly Cloudy

Yes

Low of 49°F10°C, High of 69°F21°C
Wind: 6 mph10 km/h
Precipitation: 37% rain

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