Climate twins of Marathon, FL
These are the US cities whose 12-month climate pattern most closely matches Marathon'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: Marathon vs its climate twin
Top match: Port Isabel, TX
| Month | Marathon | Port Isabel | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 75.8°F | 64.2°F | 1.64 in | 68.9°F | 51.7°F | 1.45 in |
| February | 78.1°F | 66.4°F | 1.70 in | 72.2°F | 56.3°F | 1.22 in |
| March | 80.7°F | 68.5°F | 1.33 in | 75.7°F | 61.2°F | 1.68 in |
| April | 84.1°F | 72.5°F | 2.11 in | 80.8°F | 67.0°F | 1.59 in |
| May | 87.5°F | 75.8°F | 3.36 in | 86.1°F | 72.7°F | 2.36 in |
| June | 90.3°F | 78.5°F | 4.23 in | 90.1°F | 76.3°F | 3.06 in |
| July | 90.9°F | 79.4°F | 3.77 in | 91.0°F | 77.0°F | 2.27 in |
| August | 91.6°F | 79.7°F | 5.32 in | 92.1°F | 77.0°F | 1.93 in |
| September | 89.9°F | 78.4°F | 6.37 in | 88.5°F | 73.9°F | 6.15 in |
| October | 86.2°F | 75.8°F | 5.90 in | 85.1°F | 69.0°F | 3.86 in |
| November | 81.2°F | 70.8°F | 1.79 in | 77.5°F | 60.7°F | 1.77 in |
| December | 77.9°F | 67.5°F | 2.20 in | 70.5°F | 53.6°F | 1.41 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 →