Yes

you do need a jacket based on the weather in Coeur d'Alene, ID, USA 1 second ago

Why? Because it's pretty chilly!
58°F15°C & Mostly Cloudy

Wind is 4 mph6 km/h from the Southeast, gusting to 6 mph10 km/h
August 17
9am58°F14°C4 mph6 km/h SoutheastPartly Cloudy
10am60°F15°C4 mph6 km/h SoutheastPartly Cloudy
11am63°F17°C6 mph9 km/h SouthPartly Cloudy
12pm66°F19°C7 mph11 km/h SouthClear
1pm68°F20°C7 mph11 km/h SouthClear
2pm71°F22°C7 mph11 km/h SouthClear
3pm73°F23°C7 mph11 km/h SouthwestMostly Clear
4pm75°F24°C7 mph12 km/h SouthwestMostly Clear
5pm76°F24°C7 mph12 km/h SouthwestMostly Clear
6pm77°F25°C7 mph11 km/h SouthwestMostly Clear
7pm77°F25°C6 mph9 km/h SouthwestMostly Clear
8pm77°F25°C5 mph9 km/h SouthwestClear
DateLowHighWindDayNight
August 1758°F14°C77°F25°C6 mph10 km/h from SouthwestMostly ClearPartly Cloudy
August 1857°F14°C79°F26°C3 mph5 km/h from NorthwestPartly CloudyClear
August 1958°F15°C83°F28°C3 mph5 km/h from WestClearMostly Clear
August 2059°F15°C82°F28°C6 mph9 km/h from SouthwestClearClear
August 2157°F14°C82°F28°C3 mph5 km/h from WestClearClear
August 2257°F14°C86°F30°C4 mph6 km/h from NortheastClearClear
August 2361°F16°C91°F33°C4 mph6 km/h from NorthClearClear

Yes

Low of 57°F14°C, High of 79°F26°C
Wind: 3 mph5 km/h
Precipitation: 5% rain

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