Yes
you do need a jacket based on the weather in St Clair County, IL, USA 1 second ago
Why? Because it's cool. Pleasantly cool, but cool and the wind makes walking forward feel like moonwalking in reverse!
58°F15°C & Windy
Wind is 17 mph27 km/h from the Northwest, gusting to 27 mph44 km/h
| February 27 | ||||
| 6pm | 57°F14°C | 15 mph23 km/h Northwest | Clear | |
| 7pm | 53°F12°C | 10 mph16 km/h Northwest | Clear | |
| 8pm | 50°F10°C | 8 mph14 km/h Northwest | Clear | |
| 9pm | 47°F8°C | 7 mph12 km/h Northwest | Clear | |
| 10pm | 44°F7°C | 6 mph10 km/h Northwest | Clear | |
| 11pm | 42°F6°C | 6 mph9 km/h Northwest | Clear | |
| February 28 | ||||
| 12am | 40°F5°C | 5 mph8 km/h West | Clear | |
| 1am | 39°F4°C | 5 mph7 km/h West | Clear | |
| 2am | 38°F3°C | 5 mph8 km/h Southwest | Clear | |
| 3am | 37°F3°C | 6 mph9 km/h Southwest | Clear | |
| 4am | 37°F3°C | 6 mph10 km/h Southwest | Mostly Clear | |
| 5am | 36°F2°C | 7 mph12 km/h Southwest | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| February 27 | 39°F4°C | 61°F16°C | 12 mph20 km/h from Northwest | Clear | Clear |
| February 28 | 36°F2°C | 67°F20°C | 15 mph24 km/h from West | Clear | Mostly Clear |
| March 1 | 28°F-2°C | 47°F8°C | 12 mph19 km/h from North | Partly Cloudy | Mostly Clear |
| March 2 | 25°F-4°C | 45°F7°C | 5 mph8 km/h from Southeast | Clear | Mostly Cloudy |
| March 3 | 32°F0°C | 52°F11°C | 13 mph21 km/h from Southeast | Mostly Cloudy | Cloudy |
| March 4 | 48°F9°C | 59°F15°C | 15 mph24 km/h from South | Rain | Drizzle |
| March 5 | 36°F2°C | 54°F12°C | 20 mph32 km/h from Northwest | Windy | Partly Cloudy |
Yes
Low of 37°F3°C, High of 67°F20°CWind: 15 mph24 km/h
Precipitation: None