No
you don't need a jacket based on the weather in Crystal Lake, IL, USA 1 second ago
72°F22°C & Cloudy
Wind is 7 mph12 km/h from the South, gusting to 11 mph18 km/h
| September 9 | ||||
| 6pm | 72°F22°C | 7 mph12 km/h South | Mostly Cloudy | |
| 7pm | 71°F21°C | 6 mph10 km/h South | Mostly Cloudy | |
| 8pm | 67°F19°C | 5 mph8 km/h South | Cloudy | |
| 9pm | 64°F18°C | 5 mph8 km/h South | Cloudy | |
| 10pm | 62°F17°C | 5 mph8 km/h South | Cloudy | |
| 11pm | 60°F16°C | 5 mph8 km/h South | Cloudy | |
| September 10 | ||||
| 12am | 59°F15°C | 5 mph8 km/h South | Mostly Cloudy | |
| 1am | 57°F14°C | 5 mph8 km/h South | Partly Cloudy | |
| 2am | 57°F14°C | 5 mph7 km/h South | Partly Cloudy | |
| 3am | 55°F13°C | 4 mph7 km/h South | Partly Cloudy | |
| 4am | 55°F13°C | 4 mph7 km/h South | Partly Cloudy | |
| 5am | 54°F12°C | 4 mph6 km/h South | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 9 | 50°F10°C | 75°F24°C | 5 mph9 km/h from South | Partly Cloudy | Mostly Cloudy |
| September 10 | 53°F12°C | 76°F25°C | 4 mph6 km/h from South | Partly Cloudy | Partly Cloudy |
| September 11 | 57°F14°C | 78°F25°C | 6 mph10 km/h from East | Mostly Clear | Clear |
| September 12 | 57°F14°C | 82°F28°C | 7 mph11 km/h from South | Mostly Clear | Mostly Cloudy |
| September 13 | 63°F17°C | 84°F29°C | 9 mph15 km/h from South | Mostly Cloudy | Mostly Cloudy |
| September 14 | 64°F18°C | 84°F29°C | 5 mph8 km/h from East | Partly Cloudy | Partly Cloudy |
| September 15 | 65°F18°C | 81°F27°C | 6 mph10 km/h from Southeast | Mostly Cloudy | Partly Cloudy |
Yes
Low of 54°F12°C, High of 76°F25°CWind: 4 mph6 km/h
Precipitation: None