Climate twins of Fairfax, SD
These are the US cities whose 12-month climate pattern most closely matches Fairfax'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: Fairfax vs its climate twin
Top match: Brandon, SD
| Month | Fairfax | Brandon | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 31.3°F | 10.7°F | 0.40 in | 27.2°F | 8.5°F | 0.60 in |
| February | 35.5°F | 13.7°F | 0.73 in | 32.0°F | 12.6°F | 0.83 in |
| March | 46.8°F | 22.6°F | 1.42 in | 45.0°F | 24.3°F | 1.60 in |
| April | 57.9°F | 33.6°F | 3.10 in | 59.0°F | 35.5°F | 3.00 in |
| May | 69.1°F | 45.2°F | 4.30 in | 70.8°F | 47.5°F | 3.86 in |
| June | 79.8°F | 57.1°F | 3.90 in | 80.9°F | 58.8°F | 4.23 in |
| July | 86.5°F | 61.8°F | 3.16 in | 85.3°F | 63.4°F | 3.25 in |
| August | 84.8°F | 60.1°F | 2.79 in | 82.8°F | 61.1°F | 3.34 in |
| September | 76.4°F | 50.7°F | 2.91 in | 75.6°F | 51.9°F | 2.73 in |
| October | 61.9°F | 37.4°F | 1.97 in | 61.1°F | 38.1°F | 2.36 in |
| November | 46.8°F | 24.2°F | 0.92 in | 45.0°F | 24.5°F | 1.22 in |
| December | 34.1°F | 14.7°F | 0.33 in | 31.6°F | 13.4°F | 0.83 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 →