Climate twins of Harahan, LA
These are the US cities whose 12-month climate pattern most closely matches Harahan'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: Harahan vs its climate twin
Top match: Dauphin Island, AL
| Month | Harahan | Dauphin Island | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 64.3°F | 46.5°F | 4.95 in | 58.6°F | 46.1°F | 5.23 in |
| February | 68.4°F | 50.5°F | 4.14 in | 61.5°F | 49.4°F | 4.35 in |
| March | 74.5°F | 55.8°F | 4.60 in | 66.8°F | 55.8°F | 4.90 in |
| April | 80.9°F | 62.0°F | 4.99 in | 73.5°F | 63.1°F | 5.16 in |
| May | 87.9°F | 69.3°F | 5.39 in | 80.8°F | 71.2°F | 5.01 in |
| June | 92.5°F | 74.9°F | 7.37 in | 86.2°F | 76.4°F | 5.87 in |
| July | 93.9°F | 76.6°F | 8.77 in | 88.2°F | 78.2°F | 6.80 in |
| August | 94.0°F | 76.9°F | 6.80 in | 88.1°F | 78.3°F | 6.02 in |
| September | 90.1°F | 73.6°F | 5.72 in | 85.2°F | 75.5°F | 5.24 in |
| October | 82.6°F | 64.7°F | 3.58 in | 77.4°F | 66.7°F | 3.52 in |
| November | 72.9°F | 54.6°F | 3.78 in | 67.8°F | 55.6°F | 3.86 in |
| December | 66.4°F | 49.0°F | 4.51 in | 61.2°F | 49.2°F | 5.13 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 →