Yes

you do need a jacket based on the weather in Upper Darby, PA, USA 1 second ago

Why? Because it's quite chilly.
48°F9°C & Cloudy

Wind is 5 mph8 km/h from the N, gusting to 11 mph18 km/h
March 28
11am49°F9°C6 mph10 km/h NWDrizzle
12pm50°F10°C8 mph13 km/h NDrizzle
1pm51°F10°C9 mph14 km/h NDrizzle
2pm51°F11°C9 mph15 km/h NCloudy
3pm51°F10°C9 mph14 km/h NDrizzle
4pm50°F10°C8 mph13 km/h NWRain
5pm49°F10°C9 mph14 km/h NDrizzle
6pm49°F9°C7 mph12 km/h NDrizzle
7pm48°F9°C6 mph10 km/h NWCloudy
8pm47°F8°C7 mph11 km/h NWCloudy
9pm46°F8°C8 mph13 km/h NWCloudy
10pm45°F7°C9 mph15 km/h NWCloudy
DateLowHighWindDayNight
March 2843°F6°C51°F11°C7 mph11 km/h from NRainPartly Cloudy
March 2936°F2°C56°F13°C12 mph20 km/h from NWClearClear
March 3035°F2°C59°F15°C8 mph13 km/h from WMostly CloudyDrizzle
March 3145°F7°C61°F16°C9 mph14 km/h from NWMostly CloudyCloudy
April 139°F4°C49°F9°C6 mph10 km/h from EDrizzleRain
April 241°F5°C49°F9°C6 mph10 km/h from ERainCloudy
April 340°F5°C48°F9°C9 mph14 km/h from NWMostly CloudyRain

Yes

Low of 36°F2°C, High of 56°F14°C
Wind: 12 mph20 km/h
Precipitation: None

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