Climate twins of Danville, CA
These are the US cities whose 12-month climate pattern most closely matches Danville'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: Danville vs its climate twin
Top match: Solvang, CA
| Month | Danville | Solvang | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 53.7°F | 41.7°F | 5.06 in | 67.2°F | 34.2°F | 4.89 in |
| February | 54.6°F | 41.7°F | 4.90 in | 68.1°F | 35.4°F | 5.29 in |
| March | 57.9°F | 42.9°F | 3.69 in | 71.2°F | 37.8°F | 3.61 in |
| April | 62.0°F | 44.4°F | 1.92 in | 75.7°F | 39.3°F | 1.31 in |
| May | 67.8°F | 49.3°F | 1.13 in | 79.8°F | 42.8°F | 0.54 in |
| June | 75.9°F | 55.4°F | 0.27 in | 86.2°F | 45.3°F | 0.06 in |
| July | 82.5°F | 61.5°F | 0.01 in | 92.1°F | 47.8°F | 0.01 in |
| August | 82.8°F | 61.0°F | 0.03 in | 93.2°F | 48.5°F | 0.00 in |
| September | 80.0°F | 59.7°F | 0.12 in | 90.6°F | 46.7°F | 0.08 in |
| October | 71.7°F | 54.0°F | 1.19 in | 84.2°F | 43.1°F | 0.80 in |
| November | 60.4°F | 46.2°F | 2.65 in | 74.8°F | 38.0°F | 1.24 in |
| December | 53.4°F | 41.3°F | 5.08 in | 66.8°F | 33.4°F | 3.30 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 →