Yes
you do need a jacket based on the weather in Issaquah, WA, USA 1 second ago
Why? Because it's not very warm out.
59°F15°C & Cloudy
Wind is 2 mph4 km/h from the N, gusting to 6 mph9 km/h
| September 21 | ||||
| 2pm | 60°F15°C | 3 mph5 km/h N | Mostly Cloudy | |
| 3pm | 64°F18°C | 4 mph7 km/h NW | Mostly Clear | |
| 4pm | 66°F19°C | 4 mph6 km/h N | Mostly Clear | |
| 5pm | 69°F20°C | 4 mph7 km/h N | Clear | |
| 6pm | 70°F21°C | 4 mph7 km/h N | Clear | |
| 7pm | 70°F21°C | 5 mph8 km/h N | Clear | |
| 8pm | 69°F21°C | 5 mph7 km/h N | Mostly Clear | |
| 9pm | 67°F20°C | 4 mph6 km/h N | Clear | |
| 10pm | 63°F17°C | 3 mph5 km/h N | Mostly Clear | |
| 11pm | 60°F15°C | 3 mph5 km/h N | Clear | |
| September 22 | ||||
| 12am | 58°F14°C | 2 mph4 km/h NE | Mostly Clear | |
| 1am | 56°F13°C | 3 mph4 km/h E | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 21 | 46°F8°C | 70°F21°C | 3 mph5 km/h from N | Mostly Clear | Partly Cloudy |
| September 22 | 49°F10°C | 70°F21°C | 3 mph5 km/h from SW | Mostly Cloudy | Mostly Cloudy |
| September 23 | 56°F13°C | 71°F22°C | 3 mph4 km/h from NW | Mostly Cloudy | Mostly Clear |
| September 24 | 54°F12°C | 78°F25°C | 3 mph5 km/h from NW | Mostly Clear | Mostly Clear |
| September 25 | 57°F14°C | 68°F20°C | 5 mph8 km/h from SW | Drizzle | Drizzle |
| September 26 | 51°F11°C | 68°F20°C | 4 mph6 km/h from S | Drizzle | Mostly Cloudy |
| September 27 | 51°F11°C | 63°F17°C | 8 mph14 km/h from SW | Drizzle | Partly Cloudy |
Yes
Low of 49°F10°C, High of 70°F21°CWind: 3 mph5 km/h
Precipitation: None