Climate twins of Hartford, IA
These are the US cities whose 12-month climate pattern most closely matches Hartford'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: Hartford vs its climate twin
Top match: West Liberty, IA
| Month | Hartford | West Liberty | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 30.0°F | 12.8°F | 1.02 in | 29.3°F | 11.6°F | 1.14 in |
| February | 35.0°F | 16.7°F | 1.35 in | 34.3°F | 15.5°F | 1.40 in |
| March | 48.7°F | 28.3°F | 2.31 in | 47.9°F | 26.6°F | 2.33 in |
| April | 61.8°F | 39.0°F | 3.84 in | 61.6°F | 37.1°F | 3.86 in |
| May | 71.0°F | 50.8°F | 4.78 in | 72.2°F | 48.9°F | 5.05 in |
| June | 79.9°F | 60.5°F | 5.60 in | 81.0°F | 59.0°F | 5.49 in |
| July | 83.5°F | 63.8°F | 3.85 in | 84.4°F | 62.5°F | 4.56 in |
| August | 82.0°F | 61.4°F | 4.22 in | 82.4°F | 60.2°F | 4.32 in |
| September | 75.9°F | 52.8°F | 3.16 in | 76.3°F | 51.6°F | 3.45 in |
| October | 62.9°F | 41.2°F | 2.89 in | 63.2°F | 39.9°F | 3.00 in |
| November | 47.7°F | 28.8°F | 1.94 in | 47.5°F | 27.6°F | 2.27 in |
| December | 35.4°F | 18.6°F | 1.61 in | 34.4°F | 17.5°F | 1.60 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 →