Climate twins of Rowan, IA
These are the US cities whose 12-month climate pattern most closely matches Rowan'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: Rowan vs its climate twin
Top match: Pierson, IA
| Month | Rowan | Pierson | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 25.8°F | 6.2°F | 0.73 in | 25.7°F | 8.6°F | 0.93 in |
| February | 31.1°F | 11.2°F | 0.91 in | 30.9°F | 12.8°F | 1.08 in |
| March | 44.0°F | 24.5°F | 1.96 in | 44.8°F | 24.5°F | 1.99 in |
| April | 59.0°F | 35.0°F | 3.75 in | 58.7°F | 35.8°F | 3.42 in |
| May | 71.6°F | 47.7°F | 4.81 in | 69.8°F | 48.8°F | 4.50 in |
| June | 82.0°F | 58.6°F | 5.81 in | 79.4°F | 59.4°F | 5.14 in |
| July | 85.0°F | 61.9°F | 4.04 in | 81.4°F | 63.1°F | 3.79 in |
| August | 82.3°F | 59.9°F | 4.10 in | 79.3°F | 61.2°F | 4.24 in |
| September | 76.3°F | 50.9°F | 3.13 in | 73.3°F | 52.0°F | 3.08 in |
| October | 63.1°F | 38.3°F | 2.29 in | 60.3°F | 39.2°F | 2.36 in |
| November | 45.4°F | 24.8°F | 1.52 in | 44.2°F | 25.3°F | 1.45 in |
| December | 31.4°F | 13.0°F | 1.22 in | 30.8°F | 13.8°F | 1.18 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 →