No
you don't need a jacket based on the weather in Chicago (South Side), Illinois, United States 1 second ago
77°F25°C & Clear
Wind is 4 mph7 km/h from the Northeast, gusting to 6 mph9 km/h
| September 17 | ||||
| 1pm | 78°F26°C | 5 mph8 km/h Northeast | Clear | |
| 2pm | 79°F26°C | 7 mph11 km/h Northeast | Clear | |
| 3pm | 80°F27°C | 6 mph10 km/h Northeast | Clear | |
| 4pm | 80°F27°C | 6 mph10 km/h Northeast | Clear | |
| 5pm | 80°F27°C | 6 mph9 km/h Northeast | Clear | |
| 6pm | 79°F26°C | 5 mph9 km/h Northeast | Clear | |
| 7pm | 77°F25°C | 4 mph7 km/h Northeast | Clear | |
| 8pm | 74°F23°C | 4 mph7 km/h Northeast | Mostly Clear | |
| 9pm | 72°F22°C | 4 mph6 km/h East | Clear | |
| 10pm | 70°F21°C | 3 mph5 km/h East | Clear | |
| 11pm | 69°F21°C | 3 mph5 km/h East | Clear | |
| September 18 | ||||
| 12am | 68°F20°C | 3 mph5 km/h East | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 17 | 63°F17°C | 80°F27°C | 4 mph7 km/h from Northeast | Clear | Clear |
| September 18 | 63°F17°C | 83°F28°C | 4 mph7 km/h from East | Mostly Clear | Mostly Clear |
| September 19 | 65°F18°C | 83°F28°C | 5 mph9 km/h from East | Mostly Clear | Partly Cloudy |
| September 20 | 65°F18°C | 81°F27°C | 5 mph9 km/h from Southeast | Partly Cloudy | Partly Cloudy |
| September 21 | 66°F19°C | 80°F27°C | 8 mph13 km/h from Southwest | Mostly Cloudy | Thunderstorms |
| September 22 | 66°F19°C | 78°F26°C | 6 mph10 km/h from Southwest | Thunderstorms | Drizzle |
| September 23 | 65°F18°C | 76°F25°C | 6 mph10 km/h from Southwest | Drizzle | Partly Cloudy |
No
Low of 63°F17°C, High of 83°F29°CWind: 4 mph7 km/h
Precipitation: None