Yes

you do need a jacket based on the weather in Grand Rapids, MI, USA 1 second ago

Why? Because just cool enough for a jacket, but not warm enough to ditch it!
53°F12°C & Mostly Clear

Wind is 5 mph8 km/h from the Northeast, gusting to 11 mph18 km/h
June 7
6am53°F11°C5 mph9 km/h NortheastMostly Clear
7am54°F12°C5 mph8 km/h NortheastMostly Clear
8am58°F14°C6 mph10 km/h EastMostly Clear
9am62°F17°C8 mph13 km/h EastMostly Clear
10am66°F19°C8 mph13 km/h EastPartly Cloudy
11am70°F21°C9 mph14 km/h EastMostly Cloudy
12pm72°F22°C9 mph14 km/h EastMostly Cloudy
1pm75°F24°C8 mph14 km/h EastMostly Cloudy
2pm76°F25°C8 mph13 km/h EastPartly Cloudy
3pm77°F25°C7 mph12 km/h EastMostly Cloudy
4pm77°F25°C7 mph11 km/h EastMostly Cloudy
5pm77°F25°C7 mph11 km/h EastCloudy
DateLowHighWindDayNight
June 753°F11°C77°F25°C8 mph12 km/h from EastMostly CloudyMostly Cloudy
June 857°F14°C77°F25°C5 mph9 km/h from SouthPartly CloudyRain
June 956°F14°C74°F23°C10 mph17 km/h from SouthwestPartly CloudyRain
June 1053°F12°C71°F22°C10 mph17 km/h from WestMostly ClearClear
June 1156°F14°C82°F28°C13 mph20 km/h from SouthwestMostly ClearPartly Cloudy
June 1262°F17°C78°F25°C5 mph9 km/h from EastDrizzleDrizzle
June 1362°F17°C82°F28°C8 mph13 km/h from SoutheastMostly CloudyCloudy

Yes

Low of 57°F14°C, High of 77°F25°C
Wind: 5 mph9 km/h
Precipitation: 13% rain

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