Yes

you do need a jacket based on the weather in Philadelphia (East Passyunk Crossing), Pennsylvania, United States 12 seconds ago

Why? Because just cool enough for a jacket, but not warm enough to ditch it!
54°F12°C & Cloudy

Wind is 3 mph5 km/h from the Northwest, gusting to 8 mph13 km/h
October 26
12am51°F11°C4 mph6 km/h NorthCloudy
1am50°F10°C3 mph5 km/h NorthCloudy
2am50°F10°C3 mph4 km/h NorthCloudy
3am49°F10°C3 mph4 km/h NorthwestCloudy
4am49°F9°C2 mph4 km/h NorthCloudy
5am48°F9°C2 mph3 km/h NorthMostly Cloudy
6am47°F8°C3 mph4 km/h NorthwestPartly Cloudy
7am46°F8°C3 mph5 km/h NorthMostly Clear
8am44°F7°C3 mph5 km/h NorthMostly Clear
9am43°F6°C3 mph5 km/h NorthMostly Clear
10am43°F6°C3 mph5 km/h NorthMostly Clear
11am42°F6°C3 mph5 km/h NorthMostly Clear
DateLowHighWindDayNight
October 2543°F6°C61°F16°C3 mph4 km/h from NorthwestPartly CloudyPartly Cloudy
October 2642°F6°C61°F16°C3 mph6 km/h from NorthPartly CloudyMostly Cloudy
October 2743°F6°C58°F15°C7 mph11 km/h from NortheastMostly ClearPartly Cloudy
October 2842°F6°C57°F14°C11 mph17 km/h from NortheastMostly CloudyPartly Cloudy
October 2943°F6°C59°F15°C10 mph16 km/h from NortheastPartly CloudyRain
October 3050°F10°C60°F16°C14 mph23 km/h from EastHeavy RainRain
October 3147°F8°C58°F14°C10 mph17 km/h from SouthwestPartly CloudyRain

Yes

Low of 43°F6°C, High of 61°F16°C
Wind: 3 mph6 km/h
Precipitation: None

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