Yes

you do need a jacket based on the weather in Belleville, IL, USA 1 second ago

Why? Because you're not freezing, but you’ll definitely start complaining if it lasts much longer!
43°F6°C & Clear

Wind is 6 mph10 km/h from the West, gusting to 13 mph21 km/h
October 31
8am43°F6°C7 mph11 km/h WestClear
9am42°F6°C6 mph10 km/h WestClear
10am41°F5°C6 mph10 km/h WestClear
11am41°F5°C6 mph10 km/h WestClear
12pm41°F5°C6 mph10 km/h WestClear
1pm41°F5°C6 mph10 km/h WestClear
2pm45°F7°C8 mph13 km/h WestClear
3pm49°F9°C8 mph13 km/h WestClear
4pm53°F11°C9 mph14 km/h WestMostly Clear
5pm56°F13°C9 mph14 km/h WestMostly Clear
6pm58°F15°C9 mph14 km/h WestMostly Clear
7pm60°F15°C10 mph16 km/h WestClear
DateLowHighWindDayNight
October 3141°F5°C60°F16°C9 mph14 km/h from WestMostly ClearMostly Cloudy
November 140°F4°C53°F12°C5 mph9 km/h from NorthwestMostly CloudyPartly Cloudy
November 236°F2°C54°F12°C5 mph7 km/h from NorthwestMostly ClearMostly Clear
November 339°F4°C62°F17°C8 mph14 km/h from WestClearPartly Cloudy
November 440°F4°C65°F18°C11 mph18 km/h from SouthPartly CloudyMostly Clear
November 550°F10°C69°F21°C11 mph18 km/h from WestMostly ClearMostly Clear
November 642°F6°C59°F15°C7 mph11 km/h from EastMostly ClearPartly Cloudy

Yes

Low of 40°F5°C, High of 53°F12°C
Wind: 5 mph9 km/h
Precipitation: None

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