Yes

you do need a jacket based on the weather in Berwyn, IL 60402, USA 1 second ago

Why? Because it's raining in your area and it's cool enough your breath is visible, but your nose isn’t red yet and it's fairly windy outside!
44°F7°C & Rain

Wind is 9 mph15 km/h from the Northeast, gusting to 22 mph35 km/h
April 5
2am44°F6°C7 mph11 km/h NortheastRain
3am43°F6°C9 mph15 km/h NorthDrizzle
4am43°F6°C12 mph19 km/h NorthRain
5am42°F6°C11 mph17 km/h NorthDrizzle
6am42°F6°C10 mph16 km/h NorthCloudy
7am42°F5°C10 mph16 km/h NorthCloudy
8am41°F5°C10 mph15 km/h NorthCloudy
9am42°F5°C9 mph15 km/h NorthCloudy
10am43°F6°C9 mph15 km/h NorthCloudy
11am46°F8°C9 mph14 km/h NorthCloudy
12pm48°F9°C9 mph15 km/h NorthMostly Cloudy
1pm50°F10°C8 mph13 km/h NorthCloudy
DateLowHighWindDayNight
April 539°F4°C52°F11°C8 mph13 km/h from NorthCloudyMostly Cloudy
April 633°F1°C49°F9°C4 mph7 km/h from NorthPartly CloudyPartly Cloudy
April 729°F-2°C40°F4°C13 mph21 km/h from NorthSnowPartly Cloudy
April 825°F-4°C40°F4°C4 mph6 km/h from NorthPartly CloudyPartly Cloudy
April 928°F-2°C50°F10°C8 mph13 km/h from SouthMostly CloudyRain
April 1037°F3°C46°F8°C7 mph12 km/h from NorthRainRain
April 1134°F1°C50°F10°C10 mph16 km/h from NorthCloudyMostly Clear

Yes

Low of 33°F1°C, High of 48°F9°C
Wind: 4 mph7 km/h
Precipitation: None

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