Yes

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

Why? Because it's cold. simple as that.
41°F5°C & Cloudy

Wind is 11 mph17 km/h from the SE, gusting to 25 mph40 km/h
April 26
9am42°F6°C11 mph18 km/h SEMostly Clear
10am48°F9°C12 mph19 km/h SEPartly Cloudy
11am53°F11°C13 mph21 km/h SEMostly Clear
12pm57°F14°C14 mph22 km/h SEPartly Cloudy
1pm60°F16°C14 mph23 km/h SEMostly Cloudy
2pm63°F17°C14 mph23 km/h SEMostly Cloudy
3pm64°F18°C14 mph23 km/h SEMostly Cloudy
4pm65°F18°C14 mph23 km/h SECloudy
5pm66°F19°C15 mph24 km/h SECloudy
6pm65°F18°C14 mph23 km/h SECloudy
7pm63°F17°C13 mph21 km/h SECloudy
8pm61°F16°C13 mph21 km/h SECloudy
DateLowHighWindDayNight
April 2634°F1°C66°F19°C13 mph21 km/h from SEMostly CloudyRain
April 2756°F13°C77°F25°C17 mph27 km/h from SWDrizzleMostly Cloudy
April 2862°F17°C80°F26°C12 mph19 km/h from SDrizzleDrizzle
April 2962°F17°C73°F23°C14 mph23 km/h from SCloudyCloudy
April 3052°F11°C71°F21°C8 mph13 km/h from WMostly ClearPartly Cloudy
May 157°F14°C71°F22°C9 mph14 km/h from WMostly CloudyRain
May 257°F14°C74°F23°C7 mph12 km/h from SRainDrizzle

Yes

Low of 55°F13°C, High of 77°F25°C
Wind: 17 mph27 km/h
Precipitation: 50% rain

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