Climate twins of Nampa, ID
These are the US cities whose 12-month climate pattern most closely matches Nampa'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: Nampa vs its climate twin
Top match: Twin Falls, ID
| Month | Nampa | Twin Falls | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 39.5°F | 23.0°F | 1.37 in | 40.4°F | 22.4°F | 1.04 in |
| February | 47.2°F | 26.0°F | 1.04 in | 45.6°F | 24.7°F | 0.78 in |
| March | 57.4°F | 31.6°F | 1.26 in | 55.9°F | 31.9°F | 0.87 in |
| April | 64.5°F | 36.1°F | 1.06 in | 62.6°F | 35.8°F | 1.02 in |
| May | 73.9°F | 44.0°F | 1.37 in | 72.7°F | 44.8°F | 1.22 in |
| June | 82.8°F | 51.0°F | 0.73 in | 81.0°F | 51.7°F | 0.67 in |
| July | 93.3°F | 57.3°F | 0.26 in | 92.1°F | 58.3°F | 0.16 in |
| August | 91.6°F | 55.5°F | 0.20 in | 90.5°F | 55.5°F | 0.34 in |
| September | 81.0°F | 46.5°F | 0.36 in | 79.9°F | 47.4°F | 0.33 in |
| October | 66.6°F | 36.5°F | 0.80 in | 66.9°F | 37.0°F | 0.70 in |
| November | 50.7°F | 28.4°F | 1.17 in | 50.7°F | 28.0°F | 0.76 in |
| December | 40.0°F | 22.8°F | 1.39 in | 39.6°F | 22.6°F | 1.31 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 →