Yes
you do need a jacket based on the weather in Williamsport, PA, USA 1 second ago
Why? Because just cool enough for a jacket, but not warm enough to ditch it!
59°F15°C & Clear
Wind is 2 mph3 km/h from the North, gusting to 2 mph3 km/h
| September 18 | ||||
| 4am | 58°F14°C | 2 mph4 km/h North | Clear | |
| 5am | 57°F14°C | 2 mph2 km/h Northwest | Clear | |
| 6am | 55°F13°C | 2 mph4 km/h West | Mostly Clear | |
| 7am | 55°F13°C | 3 mph5 km/h West | Mostly Clear | |
| 8am | 57°F14°C | 3 mph4 km/h West | Mostly Clear | |
| 9am | 62°F17°C | 2 mph4 km/h West | Clear | |
| 10am | 67°F19°C | 2 mph4 km/h West | Clear | |
| 11am | 72°F22°C | 2 mph4 km/h West | Clear | |
| 12pm | 76°F24°C | 3 mph4 km/h West | Clear | |
| 1pm | 79°F26°C | 4 mph6 km/h Northwest | Clear | |
| 2pm | 81°F27°C | 4 mph7 km/h Northwest | Clear | |
| 3pm | 82°F28°C | 5 mph7 km/h Northwest | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 18 | 54°F12°C | 83°F28°C | 3 mph5 km/h from Northwest | Clear | Clear |
| September 19 | 56°F13°C | 80°F26°C | 6 mph9 km/h from North | Mostly Clear | Clear |
| September 20 | 48°F9°C | 74°F23°C | 3 mph5 km/h from East | Mostly Clear | Mostly Clear |
| September 21 | 53°F12°C | 71°F22°C | 6 mph10 km/h from Southeast | Mostly Cloudy | Mostly Cloudy |
| September 22 | 58°F15°C | 76°F25°C | 6 mph9 km/h from South | Mostly Cloudy | Drizzle |
| September 23 | 60°F16°C | 80°F27°C | 4 mph7 km/h from Southwest | Drizzle | Mostly Clear |
| September 24 | 59°F15°C | 78°F25°C | 4 mph6 km/h from North | Partly Cloudy | Mostly Cloudy |
Yes
Low of 56°F14°C, High of 80°F27°CWind: 6 mph9 km/h
Precipitation: None