| | Tukwila, WA | Oak Brook, IL | United States |
| Rainfall | 38.9 | 38.7 | 38.1 |
| Snowfall | 5.6 | 31.1 | 27.8 |
| Precipitation Days | 154.3 | 120.5 | 106.2 |
| Sunny | 154 | 188 | 205 |
| Avg. July High | 76.1 | 83.9 | 85.8 |
| Avg. Jan. Low | 36.7 | 15.3 | 21.7 |
| Comfort Index (higher=better) | 7.4 | 6.9 | 7 |
| UV Index | 2.6 | 3.4 | 4.3 |
| Elevation ft. | 144 | 663 | 2443 |