Climate twins of Hartland, WI
These are the US cities whose 12-month climate pattern most closely matches Hartland'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: Hartland vs its climate twin
Top match: Oakdale, WI
| Month | Hartland | Oakdale | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 27.7°F | 11.6°F | 1.60 in | 25.1°F | 7.6°F | 1.30 in |
| February | 31.5°F | 14.6°F | 1.71 in | 29.9°F | 10.9°F | 1.31 in |
| March | 43.0°F | 24.0°F | 1.93 in | 42.2°F | 22.9°F | 2.06 in |
| April | 55.3°F | 34.8°F | 3.65 in | 56.0°F | 35.2°F | 3.41 in |
| May | 67.3°F | 45.8°F | 3.97 in | 68.5°F | 47.2°F | 4.02 in |
| June | 77.4°F | 55.6°F | 4.88 in | 76.8°F | 56.6°F | 4.43 in |
| July | 81.4°F | 60.3°F | 3.99 in | 80.9°F | 60.0°F | 3.91 in |
| August | 79.8°F | 58.9°F | 4.18 in | 78.5°F | 57.7°F | 4.46 in |
| September | 72.9°F | 51.1°F | 3.27 in | 71.2°F | 49.1°F | 3.39 in |
| October | 60.0°F | 39.8°F | 2.92 in | 58.0°F | 38.0°F | 2.67 in |
| November | 45.0°F | 28.3°F | 2.15 in | 42.9°F | 26.4°F | 1.85 in |
| December | 33.0°F | 18.1°F | 1.70 in | 30.2°F | 14.9°F | 1.65 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 →