Climate twins of Sumter, SC
These are the US cities whose 12-month climate pattern most closely matches Sumter'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: Sumter vs its climate twin
Top match: Elizabeth City, NC
| Month | Sumter | Elizabeth City | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 55.1°F | 32.8°F | 3.78 in | 53.2°F | 33.6°F | 3.64 in |
| February | 58.5°F | 35.0°F | 3.47 in | 56.2°F | 34.7°F | 3.29 in |
| March | 66.3°F | 40.9°F | 3.67 in | 63.2°F | 41.1°F | 4.17 in |
| April | 74.7°F | 49.6°F | 3.40 in | 72.2°F | 50.4°F | 3.47 in |
| May | 81.2°F | 57.8°F | 3.78 in | 78.9°F | 58.9°F | 4.07 in |
| June | 87.3°F | 65.9°F | 5.05 in | 85.8°F | 68.4°F | 4.49 in |
| July | 90.2°F | 69.6°F | 5.75 in | 88.9°F | 72.5°F | 5.93 in |
| August | 88.5°F | 68.4°F | 4.92 in | 87.3°F | 70.9°F | 5.91 in |
| September | 83.4°F | 62.9°F | 4.36 in | 82.2°F | 66.0°F | 5.32 in |
| October | 74.4°F | 50.9°F | 3.88 in | 74.1°F | 54.7°F | 3.70 in |
| November | 64.8°F | 40.0°F | 2.94 in | 64.0°F | 43.7°F | 3.39 in |
| December | 57.4°F | 35.0°F | 3.83 in | 56.4°F | 37.6°F | 3.88 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 →