No

you don't need a jacket based on the weather in Sammamish, WA, USA 1 second ago

69°F21°C & Clear

Wind is 2 mph4 km/h from the N, gusting to 7 mph12 km/h
July 14
2am67°F20°C3 mph4 km/h NClear
3am65°F19°C2 mph3 km/h NEClear
4am64°F18°C2 mph3 km/h EClear
5am63°F17°C2 mph3 km/h EClear
6am62°F16°C2 mph3 km/h SEClear
7am60°F16°C2 mph3 km/h SClear
8am59°F15°C2 mph3 km/h SClear
9am59°F15°C2 mph4 km/h SClear
10am62°F16°C2 mph3 km/h SClear
11am65°F18°C2 mph3 km/h SWClear
12pm69°F21°C3 mph4 km/h WClear
1pm72°F22°C3 mph5 km/h WClear
DateLowHighWindDayNight
July 1357°F14°C87°F31°C2 mph3 km/h from NClearClear
July 1458°F15°C86°F30°C4 mph6 km/h from WClearClear
July 1557°F14°C82°F28°C4 mph6 km/h from WClearMostly Clear
July 1656°F14°C85°F30°C5 mph7 km/h from NWClearMostly Cloudy
July 1763°F17°C85°F30°C4 mph7 km/h from SWPartly CloudyMostly Clear
July 1859°F15°C83°F28°C4 mph7 km/h from WMostly ClearMostly Clear
July 1960°F16°C83°F28°C5 mph8 km/h from NWMostly ClearClear

Yes

Low of 58°F15°C, High of 86°F30°C
Wind: 4 mph6 km/h
Precipitation: None

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