No
you don't need a jacket based on the weather in South Williamsport, PA 17702, USA 25 minutes ago
66°F19°C & Mostly Cloudy
Wind is 3 mph5 km/h from the Northeast, gusting to 5 mph8 km/h
| September 16 | ||||
| 10pm | 64°F18°C | 4 mph6 km/h East | Mostly Cloudy | |
| 11pm | 63°F17°C | 3 mph5 km/h Northeast | Cloudy | |
| September 17 | ||||
| 12am | 62°F17°C | 4 mph6 km/h East | Cloudy | |
| 1am | 61°F16°C | 3 mph5 km/h Northeast | Mostly Cloudy | |
| 2am | 61°F16°C | 3 mph4 km/h Northeast | Cloudy | |
| 3am | 60°F16°C | 3 mph4 km/h Northeast | Mostly Cloudy | |
| 4am | 58°F15°C | 2 mph4 km/h Northeast | Mostly Cloudy | |
| 5am | 58°F14°C | 3 mph4 km/h Northeast | Mostly Cloudy | |
| 6am | 57°F14°C | 3 mph4 km/h Northeast | Mostly Cloudy | |
| 7am | 57°F14°C | 3 mph4 km/h Northeast | Mostly Cloudy | |
| 8am | 59°F15°C | 3 mph4 km/h North | Mostly Cloudy | |
| 9am | 61°F16°C | 2 mph4 km/h Northeast | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 16 | 56°F13°C | 80°F27°C | 2 mph3 km/h from Southeast | Partly Cloudy | Mostly Cloudy |
| September 17 | 57°F14°C | 70°F21°C | 3 mph4 km/h from Northeast | Drizzle | Mostly Cloudy |
| September 18 | 60°F15°C | 80°F27°C | 3 mph4 km/h from Northwest | Mostly Clear | Mostly Clear |
| September 19 | 56°F13°C | 75°F24°C | 7 mph11 km/h from North | Mostly Clear | Clear |
| September 20 | 47°F8°C | 70°F21°C | 3 mph5 km/h from East | Clear | Mostly Clear |
| September 21 | 49°F10°C | 70°F21°C | 6 mph10 km/h from Southeast | Mostly Cloudy | Mostly Clear |
| September 22 | 52°F11°C | 76°F24°C | 5 mph8 km/h from South | Partly Cloudy | Partly Cloudy |
Yes
Low of 57°F14°C, High of 70°F21°CWind: 3 mph4 km/h
Precipitation: 38% rain