Yes

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

Why? Because a jacket will keep you cozy, but you won't break a seat!
55°F13°C & Cloudy

Wind is 2 mph3 km/h from the West, gusting to 5 mph8 km/h
June 6
8am54°F12°C2 mph4 km/h WestCloudy
9am55°F13°C2 mph3 km/h NorthwestCloudy
10am58°F14°C2 mph3 km/h WestCloudy
11am62°F17°C2 mph3 km/h NorthMostly Cloudy
12pm66°F19°C6 mph9 km/h NorthPartly Cloudy
1pm71°F22°C7 mph11 km/h NorthMostly Cloudy
2pm75°F24°C7 mph12 km/h NorthMostly Cloudy
3pm77°F25°C7 mph11 km/h NorthPartly Cloudy
4pm79°F26°C7 mph12 km/h NorthMostly Cloudy
5pm81°F27°C8 mph13 km/h NorthMostly Cloudy
6pm82°F28°C8 mph12 km/h NorthMostly Cloudy
7pm83°F28°C7 mph12 km/h NorthMostly Cloudy
DateLowHighWindDayNight
June 654°F12°C83°F28°C7 mph11 km/h from NorthMostly CloudyClear
June 753°F11°C84°F29°C5 mph8 km/h from NorthClearClear
June 856°F13°C89°F32°C4 mph6 km/h from NorthClearClear
June 957°F14°C89°F31°C4 mph6 km/h from NorthwestClearMostly Clear
June 1053°F12°C80°F27°C5 mph9 km/h from NorthwestPartly CloudyMostly Clear
June 1148°F9°C75°F24°C5 mph8 km/h from NorthwestPartly CloudyPartly Cloudy
June 1247°F8°C66°F19°C6 mph10 km/h from NorthPartly CloudyPartly Cloudy

Yes

Low of 53°F12°C, High of 84°F29°C
Wind: 5 mph8 km/h
Precipitation: None

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