Climate twins of Channahon, IL
These are the US cities whose 12-month climate pattern most closely matches Channahon's. Each "twin" must be at least 140 miles away to avoid trivial near-neighbor matches. Similarity is computed across all 24 monthly metrics (12 average temperatures + 12 average precipitations), normalized so temperature and precipitation contribute equally.
Side-by-side: Channahon vs its climate twin
Top match: Moline, IL
| Month | Channahon | Moline | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 31.6°F | 17.0°F | 2.08 in | 31.8°F | 14.8°F | 1.66 in |
| February | 36.8°F | 20.3°F | 1.68 in | 36.6°F | 18.8°F | 1.83 in |
| March | 47.7°F | 29.6°F | 2.15 in | 49.9°F | 29.6°F | 2.62 in |
| April | 60.8°F | 39.6°F | 3.78 in | 63.0°F | 39.9°F | 3.81 in |
| May | 71.9°F | 50.7°F | 4.61 in | 73.9°F | 51.1°F | 4.67 in |
| June | 80.9°F | 60.3°F | 4.50 in | 83.1°F | 61.0°F | 5.01 in |
| July | 84.9°F | 65.0°F | 3.85 in | 86.1°F | 64.9°F | 4.23 in |
| August | 82.5°F | 63.3°F | 3.75 in | 84.1°F | 62.7°F | 3.97 in |
| September | 77.2°F | 55.6°F | 3.25 in | 77.9°F | 54.2°F | 3.32 in |
| October | 64.3°F | 44.0°F | 3.09 in | 64.8°F | 42.6°F | 2.81 in |
| November | 50.0°F | 33.0°F | 2.52 in | 49.8°F | 30.9°F | 2.30 in |
| December | 37.2°F | 22.7°F | 1.96 in | 37.0°F | 20.8°F | 2.04 in |
How this is computed
Each city is represented by a 24-dimensional vector: 12 monthly average temperatures and 12 monthly average precipitations. Each dimension is z-score normalized across the population of US cities, so that temperature variance and precipitation variance contribute proportionally. Distance between cities is Euclidean. We filter out cities within 2° latitude/longitude (~140 miles) so that "twins" mean climatically similar but geographically distinct — not just the neighboring town. Full methodology →