Yes

you do need a jacket based on the weather in Ariel, WA 98603, USA 1 second ago

Why? Because it's cold. simple as that.
44°F7°C & Clear

Wind is 7 mph12 km/h from the NE, gusting to 21 mph34 km/h
April 19
9am44°F7°C8 mph13 km/h EClear
10am45°F7°C8 mph13 km/h EClear
11am49°F9°C9 mph14 km/h EClear
12pm52°F11°C10 mph17 km/h EMostly Clear
1pm56°F13°C12 mph19 km/h EClear
2pm59°F15°C12 mph20 km/h EClear
3pm61°F16°C12 mph19 km/h EClear
4pm63°F17°C12 mph19 km/h EClear
5pm65°F18°C11 mph18 km/h EClear
6pm66°F19°C11 mph18 km/h EClear
7pm67°F19°C10 mph17 km/h EClear
8pm66°F19°C10 mph16 km/h EClear
DateLowHighWindDayNight
April 1944°F7°C67°F19°C11 mph17 km/h from EClearMostly Clear
April 2043°F6°C65°F19°C9 mph14 km/h from SDrizzleMostly Cloudy
April 2140°F5°C57°F14°C5 mph8 km/h from WMostly CloudyMostly Clear
April 2235°F2°C69°F21°C3 mph5 km/h from NEPartly CloudyMostly Cloudy
April 2343°F6°C68°F20°C5 mph8 km/h from NWMostly CloudyPartly Cloudy
April 2442°F5°C60°F16°C4 mph6 km/h from WMostly CloudyCloudy
April 2545°F7°C58°F14°C5 mph7 km/h from WCloudyMostly Cloudy

Yes

Low of 43°F6°C, High of 65°F19°C
Wind: 9 mph14 km/h
Precipitation: 33% rain

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