No
you don't need a jacket based on the weather in Allentown, PA, USA 1 second ago
68°F20°C & Mostly Clear
Wind is 2 mph3 km/h from the Southwest, gusting to 6 mph10 km/h
| September 13 | ||||
| 10am | 70°F21°C | 2 mph4 km/h Southwest | Mostly Clear | |
| 11am | 73°F23°C | 4 mph6 km/h Southwest | Mostly Clear | |
| 12pm | 76°F24°C | 5 mph8 km/h Southwest | Clear | |
| 1pm | 78°F26°C | 6 mph10 km/h Southwest | Clear | |
| 2pm | 80°F27°C | 7 mph11 km/h West | Clear | |
| 3pm | 80°F27°C | 7 mph11 km/h West | Mostly Clear | |
| 4pm | 81°F27°C | 7 mph11 km/h Southwest | Mostly Clear | |
| 5pm | 80°F26°C | 5 mph8 km/h Southwest | Mostly Clear | |
| 6pm | 78°F25°C | 4 mph6 km/h Southwest | Mostly Clear | |
| 7pm | 75°F24°C | 2 mph4 km/h South | Partly Cloudy | |
| 8pm | 71°F22°C | 2 mph4 km/h Southeast | Mostly Cloudy | |
| 9pm | 69°F21°C | 3 mph4 km/h South | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 13 | 58°F15°C | 81°F27°C | 4 mph7 km/h from Southwest | Mostly Clear | Partly Cloudy |
| September 14 | 58°F15°C | 80°F27°C | 3 mph4 km/h from North | Mostly Clear | Mostly Clear |
| September 15 | 58°F14°C | 80°F27°C | 4 mph7 km/h from East | Mostly Clear | Mostly Cloudy |
| September 16 | 58°F14°C | 79°F26°C | 4 mph7 km/h from East | Partly Cloudy | Mostly Cloudy |
| September 17 | 59°F15°C | 74°F23°C | 4 mph6 km/h from East | Drizzle | Mostly Cloudy |
| September 18 | 60°F16°C | 78°F25°C | 4 mph7 km/h from East | Partly Cloudy | Partly Cloudy |
| September 19 | 62°F17°C | 80°F27°C | 4 mph7 km/h from Southwest | Partly Cloudy | Partly Cloudy |
Yes
Low of 58°F15°C, High of 81°F27°CWind: 3 mph4 km/h
Precipitation: None