No
you don't need a jacket based on the weather in Sammamish, WA, USA 1 second ago
61°F16°C & Mostly Cloudy
Wind is 2 mph3 km/h from the South, gusting to 7 mph12 km/h
| September 12 | ||||
| 1am | 61°F16°C | 1 mph2 km/h Southwest | Mostly Cloudy | |
| 2am | 61°F16°C | 3 mph4 km/h West | Mostly Cloudy | |
| 3am | 60°F16°C | 3 mph5 km/h Southwest | Mostly Cloudy | |
| 4am | 60°F15°C | 3 mph5 km/h Southwest | Cloudy | |
| 5am | 59°F15°C | 3 mph5 km/h Southwest | Cloudy | |
| 6am | 59°F15°C | 3 mph4 km/h West | Cloudy | |
| 7am | 59°F15°C | 2 mph3 km/h West | Cloudy | |
| 8am | 58°F15°C | 2 mph3 km/h Southwest | Mostly Cloudy | |
| 9am | 58°F14°C | 2 mph3 km/h Southwest | Mostly Cloudy | |
| 10am | 58°F14°C | 2 mph3 km/h West | Cloudy | |
| 11am | 59°F15°C | 3 mph4 km/h West | Cloudy | |
| 12pm | 60°F15°C | 3 mph4 km/h West | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 11 | 55°F13°C | 68°F20°C | 1 mph2 km/h from West | Mostly Cloudy | Mostly Cloudy |
| September 12 | 58°F14°C | 72°F22°C | 3 mph4 km/h from Northwest | Mostly Cloudy | Partly Cloudy |
| September 13 | 54°F12°C | 76°F24°C | 2 mph4 km/h from Southwest | Mostly Clear | Mostly Cloudy |
| September 14 | 56°F13°C | 66°F19°C | 3 mph5 km/h from South | Rain | Drizzle |
| September 15 | 54°F12°C | 68°F20°C | 3 mph5 km/h from Northwest | Partly Cloudy | Mostly Clear |
| September 16 | 52°F11°C | 79°F26°C | 3 mph5 km/h from North | Mostly Clear | Mostly Clear |
| September 17 | 53°F12°C | 68°F20°C | 6 mph9 km/h from West | Partly Cloudy | Partly Cloudy |
Yes
Low of 58°F15°C, High of 72°F22°CWind: 3 mph4 km/h
Precipitation: None