No
you don't need a jacket based on the weather in Lake Forest, IL, USA 1 second ago
60°F15°C & Mostly Clear
Wind is 7 mph11 km/h from the Southeast, gusting to 16 mph25 km/h
| October 17 | ||||
| 3am | 59°F15°C | 8 mph12 km/h Southeast | Mostly Clear | |
| 4am | 59°F15°C | 8 mph14 km/h South | Mostly Cloudy | |
| 5am | 59°F15°C | 9 mph14 km/h South | Partly Cloudy | |
| 6am | 58°F14°C | 9 mph15 km/h South | Partly Cloudy | |
| 7am | 57°F14°C | 10 mph16 km/h South | Partly Cloudy | |
| 8am | 56°F14°C | 10 mph16 km/h South | Mostly Clear | |
| 9am | 56°F13°C | 10 mph17 km/h South | Mostly Cloudy | |
| 10am | 56°F13°C | 10 mph17 km/h South | Mostly Cloudy | |
| 11am | 56°F13°C | 10 mph15 km/h South | Mostly Cloudy | |
| 12pm | 57°F14°C | 10 mph15 km/h South | Mostly Cloudy | |
| 1pm | 58°F14°C | 10 mph16 km/h South | Mostly Cloudy | |
| 2pm | 59°F15°C | 11 mph18 km/h South | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| October 16 | 56°F13°C | 64°F18°C | 6 mph9 km/h from Southeast | Mostly Clear | Partly Cloudy |
| October 17 | 56°F13°C | 71°F22°C | 11 mph18 km/h from South | Mostly Cloudy | Rain |
| October 18 | 60°F16°C | 70°F21°C | 10 mph16 km/h from Southwest | Rain | Rain |
| October 19 | 46°F8°C | 60°F16°C | 18 mph29 km/h from Northwest | Rain | Clear |
| October 20 | 43°F6°C | 63°F17°C | 13 mph21 km/h from South | Mostly Clear | Partly Cloudy |
| October 21 | 44°F7°C | 55°F13°C | 17 mph28 km/h from West | Windy | Mostly Clear |
| October 22 | 41°F5°C | 56°F14°C | 7 mph11 km/h from West | Partly Cloudy | Partly Cloudy |
Yes
Low of 56°F14°C, High of 71°F22°CWind: 11 mph18 km/h
Precipitation: 25% clear