Climate twins of Old Westbury, NY
These are the US cities whose 12-month climate pattern most closely matches Old Westbury'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: Old Westbury vs its climate twin
Top match: Seaford, DE
| Month | Old Westbury | Seaford | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 41.6°F | 27.2°F | 3.65 in | 43.6°F | 25.4°F | 3.61 in |
| February | 44.1°F | 28.2°F | 3.00 in | 45.7°F | 26.3°F | 2.91 in |
| March | 51.1°F | 34.5°F | 4.41 in | 53.9°F | 32.9°F | 4.01 in |
| April | 62.1°F | 43.3°F | 3.75 in | 64.7°F | 42.4°F | 3.44 in |
| May | 71.9°F | 52.2°F | 3.13 in | 73.3°F | 51.9°F | 3.67 in |
| June | 80.9°F | 61.5°F | 3.80 in | 82.1°F | 61.6°F | 4.19 in |
| July | 86.5°F | 67.7°F | 4.04 in | 86.7°F | 66.7°F | 4.01 in |
| August | 84.5°F | 66.1°F | 3.92 in | 85.0°F | 64.7°F | 4.50 in |
| September | 77.5°F | 59.8°F | 4.08 in | 78.9°F | 57.9°F | 4.77 in |
| October | 66.7°F | 49.2°F | 4.02 in | 68.2°F | 46.2°F | 4.23 in |
| November | 55.9°F | 39.8°F | 3.35 in | 57.3°F | 37.2°F | 3.19 in |
| December | 46.5°F | 32.6°F | 4.18 in | 48.2°F | 29.3°F | 3.78 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 →