No
you don't need a jacket based on the weather in Mechanicsburg, PA, USA 1 second ago
71°F22°C & Mostly Cloudy
Wind is 2 mph4 km/h from the Northeast, gusting to 5 mph8 km/h
| September 15 | ||||
| 11am | 75°F24°C | 3 mph4 km/h Northeast | Mostly Cloudy | |
| 12pm | 78°F25°C | 4 mph6 km/h East | Mostly Cloudy | |
| 1pm | 79°F26°C | 4 mph7 km/h East | Cloudy | |
| 2pm | 80°F27°C | 5 mph9 km/h East | Cloudy | |
| 3pm | 81°F27°C | 7 mph10 km/h East | Mostly Cloudy | |
| 4pm | 81°F27°C | 7 mph11 km/h East | Mostly Cloudy | |
| 5pm | 80°F26°C | 7 mph11 km/h East | Mostly Cloudy | |
| 6pm | 78°F26°C | 7 mph11 km/h East | Mostly Cloudy | |
| 7pm | 75°F24°C | 5 mph8 km/h East | Mostly Cloudy | |
| 8pm | 72°F22°C | 5 mph7 km/h East | Mostly Cloudy | |
| 9pm | 70°F21°C | 5 mph8 km/h East | Mostly Cloudy | |
| 10pm | 68°F20°C | 5 mph7 km/h Southeast | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 15 | 57°F14°C | 81°F27°C | 4 mph7 km/h from East | Mostly Cloudy | Mostly Cloudy |
| September 16 | 57°F14°C | 77°F25°C | 7 mph12 km/h from East | Mostly Cloudy | Cloudy |
| September 17 | 61°F16°C | 70°F21°C | 5 mph8 km/h from North | Drizzle | Mostly Cloudy |
| September 18 | 60°F16°C | 81°F27°C | 3 mph6 km/h from Northwest | Mostly Clear | Mostly Clear |
| September 19 | 59°F15°C | 83°F28°C | 4 mph7 km/h from Northwest | Mostly Clear | Mostly Clear |
| September 20 | 57°F14°C | 76°F25°C | 6 mph9 km/h from East | Mostly Clear | Partly Cloudy |
| September 21 | 59°F15°C | 75°F24°C | 6 mph10 km/h from Southeast | Mostly Cloudy | Mostly Clear |
Yes
Low of 57°F14°C, High of 78°F26°CWind: 7 mph12 km/h
Precipitation: 11% rain