Climate twins of Royal, IL
These are the US cities whose 12-month climate pattern most closely matches Royal'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: Royal vs its climate twin
Top match: Lakeview, OH
| Month | Royal | Lakeview | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 34.0°F | 18.2°F | 2.38 in | 36.3°F | 18.4°F | 2.82 in |
| February | 38.9°F | 21.6°F | 2.18 in | 40.8°F | 20.5°F | 2.33 in |
| March | 50.6°F | 30.2°F | 2.82 in | 49.8°F | 28.8°F | 2.91 in |
| April | 63.7°F | 40.8°F | 3.88 in | 63.3°F | 38.8°F | 4.18 in |
| May | 73.3°F | 52.4°F | 4.96 in | 74.1°F | 49.9°F | 4.46 in |
| June | 81.6°F | 62.0°F | 4.96 in | 82.7°F | 59.3°F | 4.71 in |
| July | 83.6°F | 65.1°F | 4.39 in | 85.7°F | 62.3°F | 4.54 in |
| August | 82.6°F | 62.9°F | 3.50 in | 84.5°F | 60.5°F | 3.63 in |
| September | 77.9°F | 55.7°F | 3.35 in | 78.8°F | 53.9°F | 3.12 in |
| October | 65.7°F | 44.3°F | 3.32 in | 66.6°F | 42.8°F | 3.03 in |
| November | 51.1°F | 32.4°F | 3.15 in | 52.4°F | 32.6°F | 3.18 in |
| December | 39.3°F | 23.9°F | 2.35 in | 41.6°F | 24.5°F | 2.64 in |
Cities that consider Royal their climate twin
These US cities have Royal in their top 3 most-similar list — meaning if you were to move from any of these places, Royal would feel familiar.
- Fishers, IN (ranks Royal #2)
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 →