Climate twins of Earlham, IA
These are the US cities whose 12-month climate pattern most closely matches Earlham'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: Earlham vs its climate twin
Top match: Blairstown, IA
| Month | Earlham | Blairstown | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 29.9°F | 9.8°F | 0.78 in | 28.1°F | 10.4°F | 1.11 in |
| February | 34.8°F | 13.2°F | 1.28 in | 32.8°F | 14.3°F | 1.28 in |
| March | 47.6°F | 24.8°F | 2.12 in | 46.0°F | 25.8°F | 2.03 in |
| April | 60.5°F | 35.4°F | 3.59 in | 60.0°F | 37.1°F | 3.68 in |
| May | 70.8°F | 48.0°F | 4.99 in | 70.9°F | 49.2°F | 4.43 in |
| June | 80.0°F | 58.3°F | 4.64 in | 80.3°F | 59.7°F | 5.23 in |
| July | 83.8°F | 62.2°F | 4.10 in | 83.6°F | 62.9°F | 4.06 in |
| August | 82.3°F | 59.4°F | 3.62 in | 82.1°F | 60.2°F | 4.08 in |
| September | 75.6°F | 50.6°F | 3.60 in | 75.8°F | 51.1°F | 3.55 in |
| October | 63.3°F | 38.3°F | 2.88 in | 62.9°F | 39.0°F | 2.86 in |
| November | 48.1°F | 26.0°F | 1.96 in | 47.2°F | 27.1°F | 2.11 in |
| December | 35.1°F | 15.9°F | 1.23 in | 33.6°F | 16.8°F | 1.58 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 →