Climate twins of Round Lake Beach, IL
These are the US cities whose 12-month climate pattern most closely matches Round Lake Beach'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: Round Lake Beach vs its climate twin
Top match: Garrett, IN
| Month | Round Lake Beach | Garrett | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 29.9°F | 14.6°F | 2.07 in | 31.7°F | 16.8°F | 2.49 in |
| February | 34.0°F | 17.5°F | 1.89 in | 35.4°F | 18.5°F | 2.17 in |
| March | 44.8°F | 26.6°F | 2.64 in | 46.2°F | 26.6°F | 2.41 in |
| April | 56.8°F | 37.1°F | 4.12 in | 59.6°F | 36.8°F | 3.65 in |
| May | 68.8°F | 47.8°F | 4.44 in | 70.7°F | 48.6°F | 4.47 in |
| June | 78.4°F | 57.9°F | 4.20 in | 80.1°F | 58.6°F | 4.18 in |
| July | 82.3°F | 63.1°F | 3.92 in | 84.0°F | 62.1°F | 3.69 in |
| August | 80.6°F | 61.8°F | 3.27 in | 81.6°F | 59.9°F | 3.67 in |
| September | 73.4°F | 54.4°F | 3.36 in | 75.7°F | 52.2°F | 3.13 in |
| October | 60.4°F | 43.1°F | 3.04 in | 62.8°F | 41.4°F | 2.79 in |
| November | 47.1°F | 30.9°F | 2.54 in | 48.3°F | 31.3°F | 2.80 in |
| December | 35.0°F | 20.8°F | 2.28 in | 36.6°F | 23.3°F | 2.55 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 →