Yes

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

Why? Because it's cool. Pleasantly cool, but cool!
51°F10°C & Cloudy

Wind is 7 mph11 km/h from the Southeast, gusting to 17 mph28 km/h
October 28
2am50°F10°C8 mph12 km/h SoutheastCloudy
3am49°F10°C8 mph13 km/h SoutheastCloudy
4am48°F9°C9 mph15 km/h SoutheastCloudy
5am48°F9°C11 mph17 km/h SoutheastCloudy
6am47°F8°C11 mph18 km/h SoutheastCloudy
7am46°F8°C10 mph16 km/h SoutheastCloudy
8am45°F7°C8 mph13 km/h SoutheastCloudy
9am44°F7°C8 mph12 km/h SoutheastCloudy
10am43°F6°C7 mph11 km/h SoutheastCloudy
11am43°F6°C7 mph12 km/h SoutheastCloudy
12pm43°F6°C7 mph11 km/h SoutheastCloudy
1pm43°F6°C7 mph11 km/h SoutheastCloudy
DateLowHighWindDayNight
October 2743°F6°C60°F16°C7 mph11 km/h from SoutheastClearCloudy
October 2843°F6°C54°F12°C6 mph10 km/h from SoutheastCloudyDrizzle
October 2940°F5°C56°F13°C5 mph9 km/h from NortheastMostly ClearPartly Cloudy
October 3037°F3°C51°F11°C4 mph6 km/h from WestCloudyMostly Cloudy
October 3139°F4°C49°F9°C9 mph14 km/h from NorthwestMostly CloudyMostly Cloudy
November 136°F2°C46°F8°C6 mph10 km/h from NorthMostly CloudyMostly Cloudy
November 234°F1°C48°F9°C9 mph15 km/h from SouthDrizzleDrizzle

Yes

Low of 43°F6°C, High of 54°F12°C
Wind: 6 mph10 km/h
Precipitation: None

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