Climate twins of Florence, SD
These are the US cities whose 12-month climate pattern most closely matches Florence'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: Florence vs its climate twin
Top match: Nelson, MN
| Month | Florence | Nelson | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 21.4°F | 1.5°F | 0.65 in | 19.0°F | 2.3°F | 0.38 in |
| February | 26.2°F | 5.1°F | 0.69 in | 23.7°F | 6.0°F | 0.41 in |
| March | 38.3°F | 18.2°F | 1.10 in | 36.6°F | 19.4°F | 1.00 in |
| April | 54.0°F | 30.8°F | 2.27 in | 52.4°F | 32.7°F | 2.04 in |
| May | 67.1°F | 44.8°F | 2.70 in | 66.3°F | 45.5°F | 3.05 in |
| June | 76.4°F | 54.9°F | 3.18 in | 75.7°F | 56.4°F | 3.72 in |
| July | 81.7°F | 59.8°F | 3.59 in | 80.2°F | 60.9°F | 4.00 in |
| August | 79.9°F | 56.3°F | 2.66 in | 78.3°F | 58.7°F | 3.46 in |
| September | 72.1°F | 46.2°F | 2.74 in | 69.9°F | 50.1°F | 2.63 in |
| October | 57.3°F | 34.2°F | 2.33 in | 54.5°F | 37.0°F | 2.21 in |
| November | 40.9°F | 20.8°F | 0.83 in | 37.6°F | 23.0°F | 0.83 in |
| December | 27.1°F | 9.1°F | 0.70 in | 24.2°F | 9.6°F | 0.36 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 →