No
you don't need a jacket based on the weather in Portland, ME, USA 8 seconds ago
69°F20°C & Cloudy
Wind is 6 mph9 km/h from the Southeast, gusting to 9 mph14 km/h
| September 18 | ||||
| 1pm | 70°F21°C | 6 mph10 km/h Southeast | Mostly Clear | |
| 2pm | 71°F22°C | 7 mph12 km/h Southeast | Mostly Clear | |
| 3pm | 71°F22°C | 8 mph12 km/h Southeast | Clear | |
| 4pm | 71°F22°C | 8 mph12 km/h South | Clear | |
| 5pm | 70°F21°C | 8 mph13 km/h South | Clear | |
| 6pm | 68°F20°C | 8 mph12 km/h South | Clear | |
| 7pm | 67°F19°C | 7 mph11 km/h South | Clear | |
| 8pm | 65°F18°C | 7 mph11 km/h Southwest | Clear | |
| 9pm | 64°F18°C | 6 mph10 km/h Southwest | Clear | |
| 10pm | 63°F17°C | 5 mph8 km/h Southwest | Clear | |
| 11pm | 62°F17°C | 5 mph7 km/h Southwest | Clear | |
| September 19 | ||||
| 12am | 62°F16°C | 4 mph6 km/h West | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 18 | 58°F14°C | 72°F22°C | 5 mph8 km/h from Southeast | Mostly Clear | Clear |
| September 19 | 55°F13°C | 71°F22°C | 10 mph15 km/h from Northwest | Mostly Clear | Clear |
| September 20 | 49°F10°C | 65°F18°C | 5 mph8 km/h from Southwest | Clear | Clear |
| September 21 | 48°F9°C | 65°F19°C | 7 mph11 km/h from South | Partly Cloudy | Mostly Clear |
| September 22 | 52°F11°C | 68°F20°C | 9 mph15 km/h from South | Clear | Mostly Clear |
| September 23 | 58°F14°C | 76°F24°C | 5 mph8 km/h from Southwest | Partly Cloudy | Mostly Clear |
| September 24 | 58°F14°C | 72°F22°C | 8 mph12 km/h from Northeast | Partly Cloudy | Mostly Clear |
Yes
Low of 55°F13°C, High of 72°F22°CWind: 10 mph15 km/h
Precipitation: None