Yes

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

Why? Because the air feels like the cozy middle ground between summer and winter!
54°F12°C & Cloudy

Wind is 3 mph5 km/h from the Southwest, gusting to 4 mph7 km/h
May 29
8am54°F12°C3 mph4 km/h SoutheastDrizzle
9am54°F12°C3 mph5 km/h SoutheastCloudy
10am55°F13°C4 mph6 km/h SoutheastCloudy
11am56°F13°C4 mph7 km/h SoutheastCloudy
12pm56°F13°C4 mph7 km/h SoutheastDrizzle
1pm57°F14°C4 mph6 km/h SoutheastCloudy
2pm59°F15°C3 mph5 km/h SouthCloudy
3pm60°F16°C2 mph3 km/h SouthCloudy
4pm62°F16°C2 mph4 km/h NorthMostly Cloudy
5pm64°F18°C4 mph6 km/h NorthPartly Cloudy
6pm67°F19°C4 mph7 km/h NorthPartly Cloudy
7pm68°F20°C5 mph8 km/h NorthPartly Cloudy
DateLowHighWindDayNight
May 2952°F11°C69°F20°C4 mph7 km/h from NorthDrizzleMostly Clear
May 3047°F8°C81°F27°C5 mph9 km/h from NorthMostly ClearMostly Cloudy
May 3151°F10°C70°F21°C9 mph14 km/h from NorthwestPartly CloudyPartly Cloudy
June 148°F9°C70°F21°C9 mph15 km/h from NorthwestMostly ClearMostly Clear
June 246°F8°C73°F23°C7 mph11 km/h from NorthwestMostly ClearMostly Clear
June 349°F10°C71°F21°C7 mph11 km/h from NorthwestPartly CloudyPartly Cloudy
June 453°F12°C71°F22°C6 mph10 km/h from NorthwestPartly CloudyPartly Cloudy

Yes

Low of 46°F8°C, High of 82°F28°C
Wind: 5 mph9 km/h
Precipitation: None

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