No
you don't need a jacket based on the weather in Mechanicsburg (Old Town), Pennsylvania, United States 1 second ago
78°F26°C & Clear
Wind is 7 mph11 km/h from the North, gusting to 11 mph18 km/h
| September 11 | ||||
| 6pm | 77°F25°C | 7 mph11 km/h North | Clear | |
| 7pm | 74°F23°C | 4 mph7 km/h Northeast | Clear | |
| 8pm | 70°F21°C | 4 mph6 km/h Northeast | Clear | |
| 9pm | 67°F20°C | 3 mph5 km/h Northeast | Clear | |
| 10pm | 65°F18°C | 3 mph5 km/h North | Clear | |
| 11pm | 63°F17°C | 3 mph4 km/h North | Clear | |
| September 12 | ||||
| 12am | 62°F16°C | 2 mph4 km/h North | Clear | |
| 1am | 59°F15°C | 3 mph5 km/h Northwest | Clear | |
| 2am | 58°F15°C | 3 mph5 km/h Northwest | Clear | |
| 3am | 57°F14°C | 3 mph5 km/h Northwest | Clear | |
| 4am | 56°F14°C | 3 mph5 km/h Northwest | Clear | |
| 5am | 56°F13°C | 3 mph5 km/h Northwest | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 11 | 60°F16°C | 81°F27°C | 3 mph5 km/h from North | Mostly Clear | Clear |
| September 12 | 55°F13°C | 79°F26°C | 3 mph5 km/h from Northeast | Mostly Clear | Mostly Clear |
| September 13 | 56°F13°C | 81°F27°C | 3 mph5 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 14 | 58°F14°C | 82°F28°C | 4 mph7 km/h from North | Mostly Clear | Mostly Clear |
| September 15 | 61°F16°C | 82°F28°C | 3 mph5 km/h from East | Partly Cloudy | Partly Cloudy |
| September 16 | 62°F17°C | 81°F27°C | 4 mph6 km/h from East | Partly Cloudy | Partly Cloudy |
| September 17 | 60°F15°C | 77°F25°C | 6 mph9 km/h from East | Partly Cloudy | Mostly Cloudy |
Yes
Low of 55°F13°C, High of 79°F26°CWind: 3 mph5 km/h
Precipitation: None