Climate twins of Castlewood, SD
These are the US cities whose 12-month climate pattern most closely matches Castlewood'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: Castlewood vs its climate twin
Top match: Riverton, MN
| Month | Castlewood | Riverton | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 21.5°F | 2.5°F | 0.52 in | 21.4°F | -0.1°F | 0.47 in |
| February | 26.2°F | 5.9°F | 0.58 in | 26.8°F | 4.1°F | 0.36 in |
| March | 38.7°F | 17.8°F | 1.12 in | 39.8°F | 17.5°F | 0.97 in |
| April | 54.1°F | 29.6°F | 2.13 in | 54.5°F | 30.5°F | 1.60 in |
| May | 67.3°F | 43.6°F | 3.18 in | 67.9°F | 42.7°F | 3.27 in |
| June | 77.5°F | 54.2°F | 3.97 in | 77.1°F | 53.2°F | 4.03 in |
| July | 82.5°F | 58.5°F | 3.49 in | 81.5°F | 57.7°F | 4.35 in |
| August | 80.5°F | 56.1°F | 3.08 in | 79.2°F | 55.3°F | 3.06 in |
| September | 72.4°F | 47.3°F | 2.69 in | 70.5°F | 46.9°F | 2.60 in |
| October | 57.8°F | 33.7°F | 2.28 in | 55.6°F | 35.2°F | 2.37 in |
| November | 41.0°F | 20.7°F | 0.76 in | 39.5°F | 21.6°F | 0.90 in |
| December | 26.9°F | 8.7°F | 0.53 in | 26.0°F | 7.6°F | 0.55 in |
Cities that consider Castlewood their climate twin
These US cities have Castlewood in their top 3 most-similar list — meaning if you were to move from any of these places, Castlewood would feel familiar.
- Fargo, ND (ranks Castlewood #2)
- Prairie Rose, ND (ranks Castlewood #2)
- Horace, ND (ranks Castlewood #3)
- Frontier, ND (ranks Castlewood #2)
- Sabin, MN (ranks Castlewood #2)
- Briarwood, ND (ranks Castlewood #2)
- Spencer, WI (ranks Castlewood #1)
- Marshfield, WI (ranks Castlewood #1)
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 →