Climate twins of Jefferson, SC
These are the US cities whose 12-month climate pattern most closely matches Jefferson'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: Jefferson vs its climate twin
Top match: Seneca, SC
| Month | Jefferson | Seneca | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 54.7°F | 32.5°F | 4.17 in | 51.9°F | 33.6°F | 4.51 in |
| February | 58.7°F | 34.8°F | 3.29 in | 55.7°F | 36.3°F | 4.16 in |
| March | 65.5°F | 41.3°F | 3.85 in | 63.9°F | 42.5°F | 4.67 in |
| April | 74.5°F | 50.2°F | 3.59 in | 72.0°F | 49.8°F | 3.78 in |
| May | 81.3°F | 59.3°F | 3.12 in | 79.0°F | 58.5°F | 3.49 in |
| June | 87.8°F | 66.8°F | 4.33 in | 85.3°F | 66.0°F | 4.40 in |
| July | 91.4°F | 70.8°F | 4.06 in | 88.7°F | 69.9°F | 3.65 in |
| August | 89.4°F | 69.1°F | 5.34 in | 87.3°F | 68.8°F | 4.91 in |
| September | 84.1°F | 63.6°F | 4.43 in | 82.0°F | 63.5°F | 3.68 in |
| October | 75.6°F | 51.8°F | 4.08 in | 72.3°F | 51.8°F | 3.60 in |
| November | 64.8°F | 40.4°F | 3.88 in | 62.3°F | 41.8°F | 3.64 in |
| December | 57.1°F | 35.5°F | 4.10 in | 53.8°F | 36.2°F | 4.50 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 →