Climate twins of Crystal Lake, IA
These are the US cities whose 12-month climate pattern most closely matches Crystal Lake'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: Crystal Lake vs its climate twin
Top match: Poynette, WI
| Month | Crystal Lake | Poynette | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 23.7°F | 6.3°F | 0.77 in | 26.4°F | 8.7°F | 1.24 in |
| February | 27.9°F | 10.3°F | 1.48 in | 30.7°F | 12.0°F | 1.40 in |
| March | 41.1°F | 22.7°F | 2.14 in | 42.8°F | 23.1°F | 1.98 in |
| April | 56.5°F | 34.3°F | 3.88 in | 56.6°F | 34.2°F | 3.74 in |
| May | 69.1°F | 47.6°F | 4.48 in | 69.0°F | 45.9°F | 4.24 in |
| June | 79.3°F | 58.4°F | 5.41 in | 78.7°F | 56.2°F | 5.14 in |
| July | 82.4°F | 62.0°F | 4.24 in | 82.2°F | 59.8°F | 4.17 in |
| August | 79.5°F | 59.2°F | 3.57 in | 80.2°F | 57.8°F | 3.80 in |
| September | 73.4°F | 50.3°F | 3.21 in | 73.4°F | 49.4°F | 3.34 in |
| October | 59.7°F | 37.4°F | 2.56 in | 60.4°F | 37.8°F | 2.78 in |
| November | 43.2°F | 24.7°F | 1.43 in | 44.4°F | 26.4°F | 2.23 in |
| December | 29.8°F | 12.9°F | 1.13 in | 31.9°F | 15.7°F | 1.45 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 →