No
you don't need a jacket based on the weather in Porto, Portugal 1 second ago
65°F18°C & Mostly Clear
Wind is 1 mph2 km/h from the Northwest, gusting to 6 mph9 km/h
| September 17 | ||||
| 6am | 68°F20°C | 3 mph4 km/h Northwest | Clear | |
| 7am | 71°F22°C | 4 mph7 km/h Northwest | Clear | |
| 8am | 73°F23°C | 6 mph9 km/h Northwest | Clear | |
| 9am | 75°F24°C | 6 mph10 km/h Northwest | Clear | |
| 10am | 76°F24°C | 7 mph11 km/h Northwest | Clear | |
| 11am | 75°F24°C | 6 mph10 km/h Northwest | Clear | |
| 12pm | 75°F24°C | 6 mph9 km/h Northwest | Clear | |
| 1pm | 73°F23°C | 5 mph8 km/h Northwest | Clear | |
| 2pm | 71°F21°C | 4 mph7 km/h Northwest | Clear | |
| 3pm | 67°F20°C | 3 mph6 km/h Northwest | Clear | |
| 4pm | 64°F18°C | 3 mph4 km/h North | Clear | |
| 5pm | 63°F17°C | 2 mph3 km/h North | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 16 | 55°F13°C | 76°F24°C | 4 mph7 km/h from Northwest | Clear | Clear |
| September 17 | 58°F14°C | 76°F25°C | 3 mph5 km/h from West | Mostly Cloudy | Partly Cloudy |
| September 18 | 59°F15°C | 79°F26°C | 3 mph5 km/h from Southwest | Mostly Clear | Partly Cloudy |
| September 19 | 59°F15°C | 70°F21°C | 6 mph10 km/h from Northwest | Mostly Cloudy | Drizzle |
| September 20 | 53°F12°C | 67°F19°C | 10 mph16 km/h from Northwest | Clear | Clear |
| September 21 | 49°F10°C | 65°F18°C | 11 mph18 km/h from North | Mostly Clear | Clear |
| September 22 | 47°F8°C | 66°F19°C | 8 mph12 km/h from North | Mostly Clear | Mostly Clear |
Yes
Low of 58°F15°C, High of 76°F25°CWind: 3 mph5 km/h
Precipitation: None