Yes
you do need a jacket based on the weather in Downingtown, PA 19335, USA 1 second ago
Why? Because it's pretty chilly!
53°F11°C & Clear
Wind is 5 mph8 km/h from the North, gusting to 12 mph19 km/h
| September 8 | ||||
| 5am | 52°F11°C | 4 mph7 km/h North | Clear | |
| 6am | 51°F11°C | 3 mph5 km/h North | Clear | |
| 7am | 51°F11°C | 5 mph7 km/h North | Clear | |
| 8am | 54°F12°C | 5 mph8 km/h North | Clear | |
| 9am | 59°F15°C | 7 mph11 km/h North | Clear | |
| 10am | 63°F17°C | 8 mph12 km/h North | Clear | |
| 11am | 66°F19°C | 8 mph13 km/h Northeast | Clear | |
| 12pm | 69°F20°C | 8 mph13 km/h Northeast | Clear | |
| 1pm | 71°F22°C | 7 mph11 km/h Northeast | Clear | |
| 2pm | 72°F22°C | 6 mph10 km/h Northeast | Clear | |
| 3pm | 73°F23°C | 6 mph9 km/h Northeast | Clear | |
| 4pm | 73°F23°C | 5 mph8 km/h Northeast | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 8 | 51°F10°C | 73°F23°C | 6 mph9 km/h from Northeast | Clear | Clear |
| September 9 | 52°F11°C | 75°F24°C | 7 mph12 km/h from Northeast | Mostly Clear | Partly Cloudy |
| September 10 | 57°F14°C | 73°F23°C | 7 mph12 km/h from Northeast | Partly Cloudy | Mostly Clear |
| September 11 | 57°F14°C | 78°F26°C | 5 mph8 km/h from North | Mostly Clear | Mostly Clear |
| September 12 | 58°F15°C | 77°F25°C | 6 mph9 km/h from Northeast | Partly Cloudy | Partly Cloudy |
| September 13 | 58°F15°C | 76°F24°C | 4 mph6 km/h from East | Partly Cloudy | Clear |
| September 14 | 56°F14°C | 77°F25°C | 5 mph8 km/h from East | Mostly Clear | Mostly Clear |
Yes
Low of 52°F11°C, High of 75°F24°CWind: 7 mph12 km/h
Precipitation: None