Climate twins of Rockville, MD
These are the US cities whose 12-month climate pattern most closely matches Rockville'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: Rockville vs its climate twin
Top match: Buchanan, VA
| Month | Rockville | Buchanan | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 42.2°F | 26.9°F | 3.11 in | 44.1°F | 26.9°F | 3.16 in |
| February | 45.0°F | 28.4°F | 2.60 in | 48.8°F | 28.5°F | 2.68 in |
| March | 53.7°F | 35.9°F | 3.66 in | 56.8°F | 35.1°F | 3.69 in |
| April | 65.9°F | 45.6°F | 3.23 in | 69.5°F | 44.0°F | 3.82 in |
| May | 74.3°F | 54.9°F | 3.55 in | 76.6°F | 54.0°F | 4.44 in |
| June | 82.2°F | 63.6°F | 3.96 in | 83.4°F | 62.8°F | 3.94 in |
| July | 87.1°F | 68.8°F | 3.98 in | 86.5°F | 67.3°F | 4.54 in |
| August | 84.9°F | 67.0°F | 3.05 in | 84.8°F | 66.0°F | 3.03 in |
| September | 77.5°F | 60.0°F | 4.01 in | 78.8°F | 59.2°F | 4.13 in |
| October | 65.9°F | 48.0°F | 3.52 in | 68.1°F | 47.0°F | 3.41 in |
| November | 55.7°F | 38.2°F | 3.27 in | 56.5°F | 35.5°F | 3.28 in |
| December | 46.0°F | 30.9°F | 3.38 in | 47.3°F | 29.8°F | 3.49 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 →