Climate twins of National City, CA
These are the US cities whose 12-month climate pattern most closely matches National City'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: National City vs its climate twin
Top match: King City, CA
| Month | National City | King City | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 67.5°F | 46.5°F | 1.82 in | 63.3°F | 38.3°F | 2.44 in |
| February | 66.8°F | 48.3°F | 2.33 in | 65.3°F | 40.3°F | 2.54 in |
| March | 67.0°F | 51.4°F | 1.39 in | 69.9°F | 42.3°F | 1.98 in |
| April | 68.4°F | 53.5°F | 0.67 in | 73.9°F | 44.0°F | 0.83 in |
| May | 68.9°F | 58.0°F | 0.27 in | 78.0°F | 47.7°F | 0.35 in |
| June | 71.0°F | 61.2°F | 0.05 in | 82.8°F | 50.9°F | 0.04 in |
| July | 74.6°F | 64.7°F | 0.06 in | 84.9°F | 53.8°F | 0.01 in |
| August | 76.9°F | 65.8°F | 0.01 in | 85.2°F | 53.7°F | 0.01 in |
| September | 77.1°F | 64.0°F | 0.09 in | 85.1°F | 51.5°F | 0.06 in |
| October | 74.9°F | 58.5°F | 0.36 in | 79.9°F | 46.4°F | 0.54 in |
| November | 71.1°F | 50.9°F | 0.57 in | 69.6°F | 40.7°F | 0.98 in |
| December | 66.5°F | 46.0°F | 1.58 in | 62.0°F | 37.1°F | 2.05 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 →