Yes
you do need a jacket based on the weather in Alton, IL, USA 1 second ago
Why? Because the cold's there, but it's just a reminder, not an invasion!
49°F9°C & Clear
Wind is 4 mph7 km/h from the West, gusting to 9 mph14 km/h
| March 9 | ||||
| 10pm | 48°F9°C | 5 mph8 km/h West | Clear | |
| 11pm | 47°F8°C | 5 mph7 km/h West | Clear | |
| March 10 | ||||
| 12am | 45°F7°C | 4 mph7 km/h Southwest | Clear | |
| 1am | 43°F6°C | 5 mph7 km/h Southwest | Clear | |
| 2am | 42°F6°C | 5 mph7 km/h Southwest | Clear | |
| 3am | 41°F5°C | 5 mph8 km/h Southwest | Clear | |
| 4am | 40°F4°C | 5 mph7 km/h Southwest | Clear | |
| 5am | 39°F4°C | 5 mph8 km/h Southwest | Clear | |
| 6am | 39°F4°C | 5 mph8 km/h Southwest | Clear | |
| 7am | 38°F3°C | 5 mph8 km/h Southwest | Clear | |
| 8am | 38°F3°C | 5 mph8 km/h Southwest | Clear | |
| 9am | 39°F4°C | 5 mph8 km/h Southwest | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| March 9 | 31°F-1°C | 63°F17°C | 4 mph7 km/h from Southwest | Clear | Clear |
| March 10 | 38°F3°C | 69°F20°C | 7 mph12 km/h from Southwest | Clear | Clear |
| March 11 | 48°F9°C | 69°F21°C | 6 mph10 km/h from West | Clear | Mostly Clear |
| March 12 | 47°F8°C | 71°F22°C | 7 mph11 km/h from South | Mostly Cloudy | Mostly Cloudy |
| March 13 | 53°F12°C | 73°F23°C | 6 mph10 km/h from South | Mostly Clear | Mostly Clear |
| March 14 | 54°F12°C | 74°F23°C | 18 mph29 km/h from South | Windy | Rain |
| March 15 | 41°F5°C | 61°F16°C | 16 mph26 km/h from Southwest | Windy | Partly Cloudy |
Yes
Low of 37°F3°C, High of 69°F21°CWind: 7 mph12 km/h
Precipitation: None