No
you don't need a jacket based on the weather in Chicago, IL, USA 6 minutes ago
78°F25°C & Clear
Wind is 7 mph11 km/h from the Northeast, gusting to 10 mph16 km/h
| September 15 | ||||
| 4pm | 78°F26°C | 8 mph13 km/h Northeast | Clear | |
| 5pm | 78°F26°C | 9 mph14 km/h Northeast | Clear | |
| 6pm | 77°F25°C | 9 mph14 km/h Northeast | Clear | |
| 7pm | 75°F24°C | 8 mph14 km/h Northeast | Clear | |
| 8pm | 73°F23°C | 7 mph11 km/h Northeast | Clear | |
| 9pm | 72°F22°C | 8 mph13 km/h Northeast | Clear | |
| 10pm | 71°F22°C | 6 mph9 km/h Northeast | Clear | |
| 11pm | 70°F21°C | 6 mph9 km/h Northeast | Clear | |
| September 16 | ||||
| 12am | 69°F21°C | 5 mph9 km/h Northeast | Clear | |
| 1am | 69°F20°C | 5 mph8 km/h East | Clear | |
| 2am | 68°F20°C | 5 mph9 km/h Southeast | Clear | |
| 3am | 67°F19°C | 5 mph9 km/h Southeast | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 15 | 68°F20°C | 78°F26°C | 7 mph12 km/h from East | Clear | Clear |
| September 16 | 63°F17°C | 81°F27°C | 5 mph8 km/h from East | Clear | Mostly Clear |
| September 17 | 64°F18°C | 81°F27°C | 5 mph7 km/h from Northeast | Mostly Clear | Mostly Clear |
| September 18 | 64°F18°C | 82°F28°C | 5 mph7 km/h from East | Mostly Clear | Mostly Clear |
| September 19 | 65°F18°C | 81°F27°C | 6 mph10 km/h from East | Partly Cloudy | Mostly Cloudy |
| September 20 | 65°F18°C | 83°F29°C | 7 mph11 km/h from Southeast | Mostly Cloudy | Partly Cloudy |
| September 21 | 66°F19°C | 82°F28°C | 9 mph15 km/h from Southwest | Drizzle | Mostly Cloudy |
No
Low of 64°F18°C, High of 81°F27°CWind: 5 mph8 km/h
Precipitation: None