Yes
you do need a jacket based on the weather in Vernon Hills, IL, USA 1 second ago
Why? Because it's cold enough that makes you wish you had a hat, but you're still too proud to admit it!
45°F7°C & Cloudy
Wind is 5 mph8 km/h from the South, gusting to 9 mph15 km/h
| December 15 | ||||
| 2pm | 45°F7°C | 5 mph9 km/h South | Cloudy | |
| 3pm | 45°F7°C | 5 mph8 km/h South | Cloudy | |
| 4pm | 45°F7°C | 5 mph8 km/h South | Cloudy | |
| 5pm | 44°F7°C | 6 mph9 km/h South | Cloudy | |
| 6pm | 43°F6°C | 6 mph9 km/h South | Haze | |
| 7pm | 43°F6°C | 6 mph10 km/h South | Cloudy | |
| 8pm | 42°F6°C | 6 mph10 km/h South | Cloudy | |
| 9pm | 42°F5°C | 7 mph11 km/h South | Cloudy | |
| 10pm | 41°F5°C | 8 mph13 km/h South | Cloudy | |
| 11pm | 41°F5°C | 8 mph12 km/h South | Cloudy | |
| December 16 | ||||
| 12am | 40°F5°C | 8 mph13 km/h South | Cloudy | |
| 1am | 40°F5°C | 9 mph14 km/h South | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| December 15 | 37°F3°C | 45°F7°C | 4 mph7 km/h from South | Cloudy | Cloudy |
| December 16 | 36°F2°C | 49°F10°C | 11 mph18 km/h from West | Mostly Cloudy | Partly Cloudy |
| December 17 | 31°F-0°C | 40°F4°C | 8 mph13 km/h from West | Mostly Cloudy | Cloudy |
| December 18 | 23°F-5°C | 36°F2°C | 10 mph16 km/h from Northwest | Partly Cloudy | Mostly Clear |
| December 19 | 20°F-7°C | 34°F1°C | 8 mph13 km/h from South | Mostly Cloudy | Mostly Cloudy |
| December 20 | 22°F-5°C | 31°F-0°C | 12 mph20 km/h from Northwest | Mostly Cloudy | Partly Cloudy |
| December 21 | 16°F-9°C | 27°F-3°C | 7 mph12 km/h from Northwest | Partly Cloudy | Partly Cloudy |
Yes
Low of 37°F3°C, High of 49°F10°CWind: 11 mph18 km/h
Precipitation: None