Yes

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

Why? Because it's cool enough your breath is visible, but your nose isn’t red yet!
50°F10°C & Clear

Wind is 2 mph4 km/h from the South, gusting to 4 mph7 km/h
September 8
10am51°F11°C3 mph5 km/h SouthMostly Clear
11am57°F14°C4 mph6 km/h SouthClear
12pm61°F16°C4 mph7 km/h SouthClear
1pm64°F18°C4 mph7 km/h SouthwestClear
2pm66°F19°C4 mph6 km/h SouthwestClear
3pm68°F20°C4 mph7 km/h SouthwestClear
4pm68°F20°C4 mph7 km/h SouthwestClear
5pm69°F20°C5 mph8 km/h SouthwestClear
6pm68°F20°C5 mph8 km/h SouthClear
7pm65°F19°C4 mph6 km/h SouthClear
8pm61°F16°C3 mph5 km/h SouthClear
9pm58°F15°C3 mph4 km/h SoutheastClear
DateLowHighWindDayNight
September 840°F4°C69°F20°C4 mph6 km/h from SouthwestMostly ClearClear
September 946°F8°C76°F24°C8 mph12 km/h from SouthMostly ClearMostly Cloudy
September 1051°F10°C77°F25°C3 mph5 km/h from SouthwestPartly CloudyMostly Clear
September 1152°F11°C77°F25°C5 mph9 km/h from NortheastMostly ClearMostly Clear
September 1253°F12°C79°F26°C5 mph7 km/h from SouthPartly CloudyPartly Cloudy
September 1360°F15°C80°F27°C9 mph15 km/h from SouthwestMostly CloudyMostly Cloudy
September 1461°F16°C72°F22°C6 mph10 km/h from NorthThunderstormsThunderstorms

Yes

Low of 46°F8°C, High of 75°F24°C
Wind: 8 mph12 km/h
Precipitation: None

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