Yes
you do need a jacket based on the weather in Seattle, WA, USA 1 second ago
Why? Because it's pretty chilly.
53°F12°C & Mostly Cloudy
Wind is 4 mph7 km/h from the S, gusting to 9 mph15 km/h
| September 20 | ||||
| 11am | 53°F12°C | 4 mph7 km/h S | Mostly Cloudy | |
| 12pm | 55°F13°C | 5 mph8 km/h S | Mostly Cloudy | |
| 1pm | 57°F14°C | 5 mph7 km/h S | Partly Cloudy | |
| 2pm | 59°F15°C | 4 mph7 km/h S | Partly Cloudy | |
| 3pm | 61°F16°C | 4 mph6 km/h SW | Mostly Cloudy | |
| 4pm | 63°F17°C | 3 mph5 km/h SW | Mostly Cloudy | |
| 5pm | 64°F18°C | 3 mph5 km/h W | Mostly Cloudy | |
| 6pm | 65°F18°C | 3 mph5 km/h NW | Partly Cloudy | |
| 7pm | 66°F19°C | 3 mph5 km/h NW | Partly Cloudy | |
| 8pm | 66°F19°C | 4 mph6 km/h N | Partly Cloudy | |
| 9pm | 64°F18°C | 4 mph6 km/h N | Partly Cloudy | |
| 10pm | 61°F16°C | 4 mph6 km/h N | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 20 | 53°F12°C | 66°F19°C | 4 mph6 km/h from SW | Drizzle | Mostly Clear |
| September 21 | 48°F9°C | 68°F20°C | 4 mph6 km/h from N | Partly Cloudy | Partly Cloudy |
| September 22 | 50°F10°C | 69°F21°C | 3 mph4 km/h from SW | Mostly Cloudy | Mostly Cloudy |
| September 23 | 56°F13°C | 70°F21°C | 3 mph5 km/h from NW | Mostly Cloudy | Mostly Clear |
| September 24 | 55°F13°C | 73°F23°C | 6 mph10 km/h from N | Partly Cloudy | Partly Cloudy |
| September 25 | 56°F14°C | 71°F22°C | 5 mph8 km/h from SW | Drizzle | Partly Cloudy |
| September 26 | 54°F12°C | 69°F21°C | 6 mph10 km/h from SW | Partly Cloudy | Partly Cloudy |
Yes
Low of 48°F9°C, High of 68°F20°CWind: 4 mph6 km/h
Precipitation: None