Yes

you do need a jacket based on the weather in Spokane, WA 99205, USA 1 second ago

Why? Because it's cool. Pleasantly cool, but cool.
59°F15°C & Cloudy

Wind is 11 mph18 km/h from the W, gusting to 21 mph33 km/h
May 1
7pm59°F15°C10 mph17 km/h WPartly Cloudy
8pm58°F14°C9 mph14 km/h WMostly Cloudy
9pm57°F14°C9 mph15 km/h WMostly Cloudy
10pm55°F13°C7 mph11 km/h WMostly Cloudy
11pm51°F11°C5 mph8 km/h WPartly Cloudy
May 2
12am48°F9°C4 mph7 km/h SWPartly Cloudy
1am45°F7°C4 mph7 km/h SWPartly Cloudy
2am43°F6°C5 mph8 km/h SWMostly Clear
3am41°F5°C5 mph8 km/h SWPartly Cloudy
4am41°F5°C4 mph7 km/h SWMostly Clear
5am38°F4°C4 mph6 km/h SClear
6am37°F3°C4 mph6 km/h SClear
DateLowHighWindDayNight
May 133°F1°C59°F15°C8 mph12 km/h from WPartly CloudyMostly Clear
May 234°F1°C63°F17°C3 mph5 km/h from WMostly ClearMostly Clear
May 337°F3°C66°F19°C5 mph8 km/h from SEMostly ClearMostly Cloudy
May 446°F8°C69°F21°C7 mph12 km/h from ECloudyDrizzle
May 541°F5°C50°F10°C8 mph12 km/h from SDrizzleDrizzle
May 641°F5°C59°F15°C13 mph20 km/h from SWMostly CloudyPartly Cloudy
May 740°F4°C58°F14°C12 mph20 km/h from SWMostly CloudyMostly Cloudy

Yes

Low of 34°F1°C, High of 63°F17°C
Wind: 3 mph5 km/h
Precipitation: None

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