No
you don't need a jacket based on the weather in Lancaster, PA, USA 1 second ago
78°F25°C & Partly Cloudy
Wind is 4 mph7 km/h from the North, gusting to 10 mph16 km/h
| September 11 | ||||
| 2pm | 79°F26°C | 6 mph10 km/h North | Mostly Cloudy | |
| 3pm | 80°F27°C | 4 mph7 km/h Northwest | Mostly Clear | |
| 4pm | 80°F27°C | 6 mph10 km/h Northwest | Clear | |
| 5pm | 79°F26°C | 7 mph10 km/h North | Clear | |
| 6pm | 77°F25°C | 5 mph9 km/h North | Clear | |
| 7pm | 73°F23°C | 2 mph4 km/h North | Clear | |
| 8pm | 69°F20°C | 3 mph5 km/h North | Mostly Clear | |
| 9pm | 66°F19°C | 3 mph5 km/h North | Mostly Clear | |
| 10pm | 64°F18°C | 3 mph4 km/h North | Mostly Clear | |
| 11pm | 62°F17°C | 3 mph4 km/h North | Clear | |
| September 12 | ||||
| 12am | 61°F16°C | 3 mph4 km/h North | Clear | |
| 1am | 59°F15°C | 3 mph5 km/h North | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 11 | 61°F16°C | 80°F27°C | 4 mph6 km/h from North | Partly Cloudy | Clear |
| September 12 | 55°F13°C | 78°F26°C | 3 mph5 km/h from Northeast | Mostly Clear | Mostly Clear |
| September 13 | 57°F14°C | 81°F27°C | 4 mph7 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 14 | 59°F15°C | 82°F28°C | 3 mph6 km/h from Northwest | Clear | Mostly Clear |
| September 15 | 60°F16°C | 82°F28°C | 5 mph7 km/h from East | Partly Cloudy | Mostly Cloudy |
| September 16 | 60°F15°C | 81°F27°C | 4 mph6 km/h from East | Mostly Cloudy | Mostly Cloudy |
| September 17 | 59°F15°C | 77°F25°C | 5 mph8 km/h from East | Partly Cloudy | Mostly Cloudy |
Yes
Low of 55°F13°C, High of 78°F26°CWind: 3 mph5 km/h
Precipitation: None