Climate twins of Savanna, IL
These are the US cities whose 12-month climate pattern most closely matches Savanna'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: Savanna vs its climate twin
Top match: Fowler, IN
| Month | Savanna | Fowler | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 30.7°F | 10.9°F | 1.66 in | 31.6°F | 15.4°F | 2.24 in |
| February | 35.3°F | 14.3°F | 1.83 in | 36.2°F | 18.1°F | 1.86 in |
| March | 47.5°F | 25.7°F | 2.51 in | 47.8°F | 27.5°F | 2.65 in |
| April | 60.6°F | 35.8°F | 3.90 in | 61.3°F | 37.6°F | 3.91 in |
| May | 72.3°F | 47.3°F | 4.57 in | 72.7°F | 49.8°F | 4.57 in |
| June | 81.7°F | 57.0°F | 5.49 in | 80.8°F | 59.5°F | 5.21 in |
| July | 84.9°F | 60.4°F | 4.89 in | 83.1°F | 61.7°F | 4.87 in |
| August | 83.3°F | 58.1°F | 3.91 in | 81.6°F | 59.3°F | 3.24 in |
| September | 76.9°F | 49.6°F | 3.71 in | 77.3°F | 51.3°F | 3.39 in |
| October | 63.9°F | 38.3°F | 3.02 in | 64.7°F | 40.3°F | 3.17 in |
| November | 48.5°F | 27.4°F | 2.60 in | 49.2°F | 30.1°F | 2.98 in |
| December | 35.8°F | 17.1°F | 2.21 in | 36.7°F | 20.8°F | 2.15 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 →