Yes

you do need a jacket based on the weather in Sandy, OR 97055, USA 1 second ago

Why? Because it's bitterly cold.
47°F9°C & Cloudy

Wind is 9 mph15 km/h from the SW, gusting to 26 mph42 km/h
May 5
6pm48°F9°C10 mph15 km/h SWRain
7pm48°F9°C11 mph17 km/h SWRain
8pm48°F9°C11 mph18 km/h SWRain
9pm48°F9°C11 mph18 km/h SWRain
10pm47°F8°C10 mph17 km/h SWRain
11pm46°F8°C10 mph16 km/h SWDrizzle
May 6
12am45°F7°C9 mph14 km/h SWDrizzle
1am44°F7°C10 mph16 km/h SWCloudy
2am44°F6°C10 mph15 km/h SWCloudy
3am43°F6°C9 mph15 km/h SWDrizzle
4am43°F6°C10 mph15 km/h SWDrizzle
5am43°F6°C9 mph15 km/h SWDrizzle
DateLowHighWindDayNight
May 541°F5°C48°F9°C8 mph12 km/h from SWRainRain
May 641°F5°C50°F10°C9 mph15 km/h from SWRainRain
May 740°F4°C52°F11°C7 mph12 km/h from WDrizzleMostly Cloudy
May 839°F4°C61°F16°C4 mph6 km/h from WPartly CloudyClear
May 941°F5°C76°F24°C6 mph9 km/h from NEClearClear
May 1051°F10°C83°F28°C5 mph7 km/h from EClearClear
May 1154°F12°C83°F28°C5 mph7 km/h from SWClearClear

Yes

Low of 41°F5°C, High of 50°F10°C
Wind: 9 mph15 km/h
Precipitation: 74% rain

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