Yes

you do need a jacket based on the weather in Philadelphia, PA 19134, USA 1 second ago

Why? Because it's cold. simple as that.
49°F9°C & Clear

Wind is 8 mph13 km/h from the NE, gusting to 17 mph28 km/h
April 25
4am48°F9°C8 mph13 km/h NEPartly Cloudy
5am46°F8°C8 mph13 km/h NEPartly Cloudy
6am45°F7°C8 mph14 km/h NEPartly Cloudy
7am43°F6°C9 mph15 km/h NEPartly Cloudy
8am44°F7°C10 mph16 km/h NEMostly Cloudy
9am45°F7°C9 mph15 km/h NEMostly Cloudy
10am47°F8°C8 mph14 km/h NECloudy
11am48°F9°C8 mph12 km/h NECloudy
12pm51°F10°C7 mph11 km/h NEMostly Cloudy
1pm54°F12°C6 mph10 km/h EPartly Cloudy
2pm56°F13°C5 mph9 km/h EPartly Cloudy
3pm57°F14°C5 mph8 km/h EPartly Cloudy
DateLowHighWindDayNight
April 2543°F6°C59°F15°C7 mph11 km/h from EMostly CloudyMostly Clear
April 2638°F4°C64°F18°C5 mph8 km/h from EClearMostly Clear
April 2741°F5°C65°F18°C8 mph13 km/h from SMostly CloudyMostly Cloudy
April 2849°F9°C81°F27°C5 mph9 km/h from SWPartly CloudyPartly Cloudy
April 2960°F16°C88°F31°C2 mph4 km/h from SWPartly CloudyMostly Clear
April 3061°F16°C88°F31°C7 mph12 km/h from SMostly ClearMostly Cloudy
May 162°F17°C81°F27°C6 mph9 km/h from NWMostly ClearMostly Clear

Yes

Low of 38°F4°C, High of 64°F18°C
Wind: 5 mph8 km/h
Precipitation: None

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