No
you don't need a jacket based on the weather in Seattle, WA, USA 1 second ago
63°F17°C & Clear
Wind is 6 mph9 km/h from the South, gusting to 11 mph18 km/h
| September 17 | ||||
| 5am | 63°F17°C | 6 mph10 km/h South | Clear | |
| 6am | 61°F16°C | 7 mph11 km/h South | Clear | |
| 7am | 60°F16°C | 7 mph11 km/h Southeast | Clear | |
| 8am | 60°F15°C | 6 mph9 km/h South | Clear | |
| 9am | 59°F15°C | 5 mph8 km/h South | Clear | |
| 10am | 58°F14°C | 5 mph9 km/h South | Clear | |
| 11am | 59°F15°C | 5 mph7 km/h South | Clear | |
| 12pm | 62°F17°C | 6 mph9 km/h South | Clear | |
| 1pm | 65°F18°C | 5 mph7 km/h South | Clear | |
| 2pm | 68°F20°C | 4 mph6 km/h Southwest | Clear | |
| 3pm | 71°F21°C | 4 mph6 km/h West | Clear | |
| 4pm | 73°F23°C | 3 mph5 km/h West | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 17 | 58°F14°C | 75°F24°C | 5 mph9 km/h from Northwest | Clear | Mostly Clear |
| September 18 | 55°F13°C | 70°F21°C | 7 mph11 km/h from North | Partly Cloudy | Clear |
| September 19 | 54°F12°C | 73°F23°C | 5 mph8 km/h from North | Clear | Mostly Clear |
| September 20 | 54°F12°C | 71°F22°C | 7 mph11 km/h from South | Partly Cloudy | Drizzle |
| September 21 | 56°F13°C | 68°F20°C | 5 mph8 km/h from Southwest | Drizzle | Partly Cloudy |
| September 22 | 54°F12°C | 69°F21°C | 4 mph7 km/h from South | Partly Cloudy | Partly Cloudy |
| September 23 | 54°F12°C | 69°F20°C | 6 mph9 km/h from North | Partly Cloudy | Mostly Cloudy |
Yes
Low of 55°F13°C, High of 70°F21°CWind: 7 mph11 km/h
Precipitation: None