Climate twins of Coulter, IA
These are the US cities whose 12-month climate pattern most closely matches Coulter'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: Coulter vs its climate twin
Top match: Farmersburg, IA
| Month | Coulter | Farmersburg | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 25.4°F | 7.9°F | 0.97 in | 25.7°F | 7.4°F | 1.12 in |
| February | 30.2°F | 11.9°F | 1.31 in | 29.9°F | 10.5°F | 1.21 in |
| March | 43.3°F | 23.6°F | 2.09 in | 43.0°F | 22.4°F | 2.09 in |
| April | 58.2°F | 34.8°F | 4.26 in | 57.5°F | 34.0°F | 4.14 in |
| May | 70.2°F | 47.6°F | 5.25 in | 69.4°F | 46.9°F | 4.99 in |
| June | 80.3°F | 58.3°F | 6.06 in | 79.0°F | 57.8°F | 5.88 in |
| July | 83.4°F | 61.9°F | 4.70 in | 82.8°F | 60.9°F | 4.52 in |
| August | 81.4°F | 59.1°F | 4.24 in | 80.8°F | 58.2°F | 4.36 in |
| September | 75.4°F | 50.2°F | 3.30 in | 74.0°F | 49.2°F | 3.96 in |
| October | 61.9°F | 38.0°F | 2.54 in | 60.6°F | 37.0°F | 3.00 in |
| November | 45.1°F | 25.4°F | 1.80 in | 44.7°F | 25.5°F | 2.10 in |
| December | 31.4°F | 14.5°F | 1.59 in | 31.4°F | 14.0°F | 1.57 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 →