Climate twins of Forest Park, IL
These are the US cities whose 12-month climate pattern most closely matches Forest Park'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: Forest Park vs its climate twin
Top match: Liberty, IL
| Month | Forest Park | Liberty | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 32.7°F | 19.4°F | 1.48 in | 34.6°F | 18.6°F | 1.57 in |
| February | 36.8°F | 22.6°F | 1.46 in | 39.7°F | 22.7°F | 1.77 in |
| March | 47.6°F | 31.7°F | 1.88 in | 51.7°F | 32.4°F | 2.29 in |
| April | 59.9°F | 41.4°F | 3.57 in | 63.7°F | 42.8°F | 3.98 in |
| May | 71.1°F | 52.0°F | 4.09 in | 73.3°F | 53.9°F | 4.55 in |
| June | 80.9°F | 62.3°F | 4.01 in | 82.4°F | 63.1°F | 4.50 in |
| July | 85.0°F | 67.7°F | 3.55 in | 86.0°F | 66.5°F | 3.49 in |
| August | 82.7°F | 66.4°F | 3.99 in | 84.5°F | 64.5°F | 3.93 in |
| September | 76.3°F | 58.8°F | 2.77 in | 77.9°F | 56.1°F | 3.09 in |
| October | 63.4°F | 46.5°F | 3.48 in | 65.3°F | 44.8°F | 3.05 in |
| November | 49.1°F | 35.0°F | 2.35 in | 51.2°F | 33.4°F | 2.41 in |
| December | 37.6°F | 25.0°F | 1.79 in | 39.3°F | 23.9°F | 1.80 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 →