Climate twins of Rockville, IN
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: Fillmore, IL
| Month | Rockville | Fillmore | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 35.7°F | 17.2°F | 3.38 in | 35.0°F | 18.9°F | 2.84 in |
| February | 41.1°F | 20.6°F | 2.60 in | 40.2°F | 22.4°F | 2.17 in |
| March | 52.3°F | 29.3°F | 3.32 in | 51.0°F | 31.4°F | 3.11 in |
| April | 65.8°F | 39.7°F | 4.96 in | 63.7°F | 41.6°F | 4.59 in |
| May | 75.6°F | 49.7°F | 5.02 in | 73.4°F | 52.6°F | 4.75 in |
| June | 83.5°F | 58.4°F | 5.45 in | 82.2°F | 61.5°F | 4.57 in |
| July | 85.8°F | 62.0°F | 4.70 in | 85.4°F | 64.6°F | 4.06 in |
| August | 84.6°F | 60.0°F | 3.84 in | 84.5°F | 61.9°F | 3.57 in |
| September | 79.2°F | 52.7°F | 3.14 in | 79.0°F | 53.7°F | 3.16 in |
| October | 66.9°F | 41.6°F | 3.87 in | 66.6°F | 42.4°F | 3.55 in |
| November | 52.1°F | 31.4°F | 3.90 in | 51.6°F | 32.4°F | 3.44 in |
| December | 39.8°F | 22.2°F | 3.25 in | 39.8°F | 24.1°F | 2.68 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 →