Yes

you do need a jacket based on the weather in 170 Zynn Rd, Downingtown, PA 19335, USA 1 second ago

Why? Because a jacket will keep you cozy, but you won't break a seat!
53°F11°C & Clear

Wind is 3 mph5 km/h from the North, gusting to 4 mph7 km/h
September 9
2am52°F11°C3 mph4 km/h NorthClear
3am51°F11°C4 mph7 km/h NorthClear
4am51°F10°C5 mph7 km/h NorthClear
5am50°F10°C4 mph7 km/h NorthClear
6am50°F10°C5 mph7 km/h NorthClear
7am50°F10°C5 mph8 km/h NorthClear
8am54°F12°C5 mph8 km/h NorthClear
9am60°F15°C6 mph10 km/h NortheastClear
10am65°F18°C7 mph11 km/h NortheastClear
11am68°F20°C8 mph13 km/h NortheastClear
12pm71°F22°C9 mph14 km/h NortheastClear
1pm72°F22°C9 mph14 km/h NortheastMostly Clear
DateLowHighWindDayNight
September 949°F10°C75°F24°C8 mph12 km/h from NortheastClearPartly Cloudy
September 1055°F13°C74°F23°C7 mph11 km/h from NortheastMostly CloudyMostly Clear
September 1155°F13°C77°F25°C5 mph8 km/h from NorthMostly ClearMostly Clear
September 1257°F14°C76°F25°C6 mph9 km/h from NortheastMostly ClearPartly Cloudy
September 1356°F14°C75°F24°C5 mph8 km/h from EastPartly CloudyMostly Clear
September 1456°F13°C77°F25°C5 mph8 km/h from SouthPartly CloudyPartly Cloudy
September 1559°F15°C76°F24°C6 mph10 km/h from NortheastPartly CloudyMostly Clear

Yes

Low of 55°F13°C, High of 73°F23°C
Wind: 7 mph11 km/h
Precipitation: 21% rain

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