Climate twins of Nisland, SD
These are the US cities whose 12-month climate pattern most closely matches Nisland'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: Nisland vs its climate twin
Top match: Melstone, MT
| Month | Nisland | Melstone | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 31.8°F | 9.8°F | 0.36 in | 34.8°F | 14.4°F | 0.51 in |
| February | 35.1°F | 12.6°F | 0.50 in | 38.0°F | 16.7°F | 0.44 in |
| March | 45.5°F | 21.7°F | 0.82 in | 48.7°F | 24.6°F | 0.77 in |
| April | 56.1°F | 31.5°F | 1.81 in | 58.6°F | 33.3°F | 1.80 in |
| May | 65.9°F | 42.6°F | 3.16 in | 67.8°F | 42.4°F | 2.92 in |
| June | 76.9°F | 52.8°F | 3.32 in | 77.6°F | 51.2°F | 2.77 in |
| July | 85.8°F | 59.2°F | 2.07 in | 87.6°F | 57.5°F | 1.54 in |
| August | 85.1°F | 56.7°F | 1.30 in | 86.8°F | 55.5°F | 1.10 in |
| September | 75.4°F | 46.5°F | 0.99 in | 75.5°F | 46.0°F | 1.18 in |
| October | 59.9°F | 33.4°F | 1.38 in | 59.9°F | 34.8°F | 1.32 in |
| November | 45.1°F | 20.9°F | 0.53 in | 45.8°F | 24.5°F | 0.59 in |
| December | 34.2°F | 11.9°F | 0.41 in | 35.7°F | 16.2°F | 0.53 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 →