Climate twins of Spring Valley, IL
These are the US cities whose 12-month climate pattern most closely matches Spring Valley'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: Spring Valley vs its climate twin
Top match: Mechanicsville, IA
| Month | Spring Valley | Mechanicsville | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 30.0°F | 14.0°F | 1.81 in | 28.7°F | 11.9°F | 1.41 in |
| February | 34.5°F | 17.6°F | 1.77 in | 33.1°F | 16.2°F | 1.45 in |
| March | 47.5°F | 27.3°F | 2.28 in | 46.8°F | 27.6°F | 2.14 in |
| April | 60.9°F | 37.7°F | 3.77 in | 60.7°F | 38.2°F | 3.79 in |
| May | 72.5°F | 49.2°F | 4.49 in | 71.9°F | 50.6°F | 4.74 in |
| June | 81.3°F | 59.4°F | 4.62 in | 81.5°F | 61.0°F | 4.74 in |
| July | 84.0°F | 62.8°F | 3.89 in | 83.7°F | 63.9°F | 4.08 in |
| August | 82.2°F | 60.8°F | 3.70 in | 82.1°F | 61.1°F | 3.83 in |
| September | 76.9°F | 52.6°F | 3.41 in | 76.8°F | 52.9°F | 3.46 in |
| October | 63.9°F | 41.1°F | 3.50 in | 63.9°F | 40.6°F | 3.11 in |
| November | 48.4°F | 30.0°F | 2.71 in | 47.8°F | 29.2°F | 2.19 in |
| December | 35.5°F | 19.9°F | 2.10 in | 34.0°F | 18.5°F | 1.55 in |
Cities that consider Spring Valley their climate twin
These US cities have Spring Valley in their top 3 most-similar list — meaning if you were to move from any of these places, Spring Valley would feel familiar.
- Portage, IN (ranks Spring Valley #1)
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 →