Yes

you do need a jacket based on the weather in Chicago, IL 60614, USA 1 second ago

Why? Because there are strong winds blowing out there!
62°F17°C & Windy

Wind is 16 mph26 km/h from the West, gusting to 27 mph44 km/h
May 17
4pm64°F18°C16 mph26 km/h WestWindy
5pm65°F19°C15 mph24 km/h WestPartly Cloudy
6pm66°F19°C14 mph23 km/h WestMostly Cloudy
7pm66°F19°C13 mph21 km/h WestPartly Cloudy
8pm65°F18°C12 mph19 km/h WestMostly Clear
9pm63°F17°C10 mph16 km/h NorthwestMostly Clear
10pm61°F16°C10 mph16 km/h NorthwestPartly Cloudy
11pm59°F15°C9 mph15 km/h NorthwestPartly Cloudy
May 18
12am58°F14°C9 mph14 km/h NorthwestPartly Cloudy
1am56°F14°C9 mph14 km/h NorthwestMostly Clear
2am55°F13°C9 mph14 km/h NorthwestMostly Clear
3am54°F12°C9 mph14 km/h NorthwestMostly Clear
DateLowHighWindDayNight
May 1754°F12°C66°F19°C13 mph21 km/h from WestMostly CloudyMostly Clear
May 1848°F9°C60°F15°C9 mph14 km/h from NortheastMostly ClearPartly Cloudy
May 1945°F7°C56°F13°C12 mph19 km/h from NortheastMostly CloudyRain
May 2049°F9°C55°F13°C16 mph26 km/h from EastRainRain
May 2146°F8°C55°F13°C12 mph19 km/h from NortheastRainMostly Cloudy
May 2245°F7°C58°F14°C11 mph17 km/h from NorthPartly CloudyMostly Clear
May 2345°F7°C61°F16°C8 mph13 km/h from NorthPartly CloudyPartly Cloudy

Yes

Low of 48°F9°C, High of 60°F16°C
Wind: 9 mph14 km/h
Precipitation: None

Support This Page