Climate twins of Grand Ridge, IL
These are the US cities whose 12-month climate pattern most closely matches Grand Ridge'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: Grand Ridge vs its climate twin
Top match: Poneto, IN
| Month | Grand Ridge | Poneto | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 31.4°F | 14.2°F | 1.95 in | 31.9°F | 17.2°F | 2.51 in |
| February | 35.4°F | 17.2°F | 1.90 in | 35.6°F | 19.2°F | 1.96 in |
| March | 47.5°F | 27.2°F | 2.54 in | 46.7°F | 27.9°F | 2.65 in |
| April | 61.2°F | 37.3°F | 3.59 in | 59.9°F | 38.7°F | 3.83 in |
| May | 72.6°F | 48.5°F | 4.70 in | 71.1°F | 50.6°F | 4.67 in |
| June | 81.1°F | 58.1°F | 4.92 in | 79.6°F | 60.4°F | 4.71 in |
| July | 84.0°F | 61.9°F | 3.85 in | 82.6°F | 63.3°F | 4.46 in |
| August | 82.4°F | 60.5°F | 4.09 in | 80.9°F | 61.2°F | 3.84 in |
| September | 77.1°F | 52.9°F | 3.46 in | 75.6°F | 53.7°F | 3.07 in |
| October | 64.1°F | 41.2°F | 3.20 in | 63.2°F | 42.4°F | 2.92 in |
| November | 49.1°F | 30.0°F | 2.72 in | 48.9°F | 32.2°F | 3.08 in |
| December | 36.6°F | 20.5°F | 2.11 in | 37.2°F | 23.0°F | 2.33 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 →