Climate twins of San Diego, TX
These are the US cities whose 12-month climate pattern most closely matches San Diego'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: San Diego vs its climate twin
Top match: Del Rio, TX
| Month | San Diego | Del Rio | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 68.1°F | 47.0°F | 1.27 in | 67.5°F | 43.6°F | 0.61 in |
| February | 73.2°F | 51.9°F | 1.35 in | 72.7°F | 48.4°F | 0.63 in |
| March | 79.0°F | 57.5°F | 1.69 in | 80.1°F | 56.1°F | 1.18 in |
| April | 85.9°F | 63.5°F | 0.98 in | 87.0°F | 62.8°F | 1.50 in |
| May | 90.3°F | 70.5°F | 3.49 in | 93.1°F | 71.1°F | 3.06 in |
| June | 95.5°F | 75.3°F | 2.32 in | 98.4°F | 77.0°F | 2.32 in |
| July | 97.1°F | 76.3°F | 2.48 in | 100.4°F | 78.7°F | 1.48 in |
| August | 97.4°F | 76.2°F | 2.62 in | 101.0°F | 78.8°F | 2.69 in |
| September | 92.6°F | 72.9°F | 5.26 in | 93.8°F | 73.3°F | 2.63 in |
| October | 86.6°F | 65.1°F | 2.72 in | 85.6°F | 64.1°F | 2.08 in |
| November | 77.1°F | 56.4°F | 1.58 in | 74.8°F | 52.5°F | 0.91 in |
| December | 70.7°F | 49.7°F | 1.30 in | 67.8°F | 44.3°F | 0.70 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 →