| Chicago high ≥ 59°F · Sun Oct 18 | Chicago, IL · Great Lakes & Upper Midwest | Sun Oct 18 | 85¢ | — | | |
| Chicago high ≥ 60°F · Sun Oct 18 | Chicago, IL · Great Lakes & Upper Midwest | Sun Oct 18 | 85¢ | — | | |
| Chicago high ≥ 62°F · Sun Oct 18 | Chicago, IL · Great Lakes & Upper Midwest | Sun Oct 18 | 59¢ | — | | |
| Chicago high ≥ 64°F · Sun Oct 18 | Chicago, IL · Great Lakes & Upper Midwest | Sun Oct 18 | 41¢ | — | | |
| Chicago high ≥ 66°F · Sun Oct 18 | Chicago, IL · Great Lakes & Upper Midwest | Sun Oct 18 | 28¢ | ▼1¢ | | |
| Chicago high ≥ 66°F · Mon Oct 19 | Chicago, IL · Great Lakes & Upper Midwest | Mon Oct 19 | 63¢ | — | | |
| Chicago high ≥ 67°F · Mon Oct 19 | Chicago, IL · Great Lakes & Upper Midwest | Mon Oct 19 | 57¢ | — | | |
| Chicago high ≥ 68°F · Mon Oct 19 | Chicago, IL · Great Lakes & Upper Midwest | Mon Oct 19 | 40¢ | — | | |
| Chicago runs hot-for-here: 75°F+ · Mon Oct 19 | Chicago, IL · Great Lakes & Upper Midwest | Mon Oct 19 | 2¢ | — | | |
| Chicago high ≥ 68°F · Tue Oct 20 | Chicago, IL · Great Lakes & Upper Midwest | Tue Oct 20 | 52¢ | — | | |
| Chicago high ≥ 69°F · Tue Oct 20 | Chicago, IL · Great Lakes & Upper Midwest | Tue Oct 20 | 51¢ | — | | |
| Chicago high ≥ 70°F · Tue Oct 20 | Chicago, IL · Great Lakes & Upper Midwest | Tue Oct 20 | 61¢ | — | | |
| Chicago high ≥ 71°F · Tue Oct 20 | Chicago, IL · Great Lakes & Upper Midwest | Tue Oct 20 | 23¢ | — | | |
| Chicago runs hot-for-here: 75°F+ · Tue Oct 20 | Chicago, IL · Great Lakes & Upper Midwest | Tue Oct 20 | 2¢ | — | | |
| Chicago high ≥ 71°F · Wed Oct 21 | Chicago, IL · Great Lakes & Upper Midwest | Wed Oct 21 | 23¢ | — | | |
| Chicago high ≥ 72°F · Wed Oct 21 | Chicago, IL · Great Lakes & Upper Midwest | Wed Oct 21 | 44¢ | — | | |
| Chicago high ≥ 73°F · Wed Oct 21 | Chicago, IL · Great Lakes & Upper Midwest | Wed Oct 21 | 22¢ | — | | |
| Chicago runs hot-for-here: 74°F+ · Wed Oct 21 | Chicago, IL · Great Lakes & Upper Midwest | Wed Oct 21 | 7¢ | ▼1¢ | | |
| Chicago high ≥ 68°F · Thu Oct 22 | Chicago, IL · Great Lakes & Upper Midwest | Thu Oct 22 | 87¢ | — | | |
| Chicago high ≥ 70°F · Thu Oct 22 | Chicago, IL · Great Lakes & Upper Midwest | Thu Oct 22 | 70¢ | — | | |
| Chicago high ≥ 71°F · Thu Oct 22 | Chicago, IL · Great Lakes & Upper Midwest | Thu Oct 22 | 47¢ | — | | |
| Chicago high ≥ 73°F · Thu Oct 22 | Chicago, IL · Great Lakes & Upper Midwest | Thu Oct 22 | 20¢ | — | | |
| Chicago runs hot-for-here: 74°F+ · Thu Oct 22 | Chicago, IL · Great Lakes & Upper Midwest | Thu Oct 22 | 12¢ | — | | |
| Chicago high ≥ 75°F · Thu Oct 22 | Chicago, IL · Great Lakes & Upper Midwest | Thu Oct 22 | 19¢ | — | | |
| Chicago high ≥ 68°F · Fri Oct 23 | Chicago, IL · Great Lakes & Upper Midwest | Fri Oct 23 | 71¢ | — | | |
| Chicago high ≥ 71°F · Fri Oct 23 | Chicago, IL · Great Lakes & Upper Midwest | Fri Oct 23 | 36¢ | — | | |
| Chicago runs hot-for-here: 73°F+ · Fri Oct 23 | Chicago, IL · Great Lakes & Upper Midwest | Fri Oct 23 | 18¢ | — | | |
| Chicago high ≥ 75°F · Fri Oct 23 | Chicago, IL · Great Lakes & Upper Midwest | Fri Oct 23 | 18¢ | — | | |
| Chicago high ≥ 69°F · Sat Oct 24 | Chicago, IL · Great Lakes & Upper Midwest | Sat Oct 24 | 60¢ | — | | |
| Chicago high ≥ 71°F · Sat Oct 24 | Chicago, IL · Great Lakes & Upper Midwest | Sat Oct 24 | 37¢ | — | | |
| Chicago high ≥ 72°F · Sat Oct 24 | Chicago, IL · Great Lakes & Upper Midwest | Sat Oct 24 | 46¢ | — | | |
| Chicago high ≥ 73°F · Sat Oct 24 | Chicago, IL · Great Lakes & Upper Midwest | Sat Oct 24 | 22¢ | — | | |
| Chicago high ≥ 69°F · Sun Oct 25 | Chicago, IL · Great Lakes & Upper Midwest | Sun Oct 25 | 73¢ | — | | |
| Chicago high ≥ 71°F · Sun Oct 25 | Chicago, IL · Great Lakes & Upper Midwest | Sun Oct 25 | 59¢ | — | | |
| Chicago runs hot-for-here: 73°F+ · Sun Oct 25 | Chicago, IL · Great Lakes & Upper Midwest | Sun Oct 25 | 41¢ | — | | |
| Chicago high ≥ 70°F · Mon Oct 26 | Chicago, IL · Great Lakes & Upper Midwest | Mon Oct 26 | 40¢ | — | | |
| Chicago runs hot-for-here: 73°F+ · Mon Oct 26 | Chicago, IL · Great Lakes & Upper Midwest | Mon Oct 26 | 19¢ | — | | |