Climate twins of Gretna, NE
These are the US cities whose 12-month climate pattern most closely matches Gretna'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: Gretna vs its climate twin
Top match: Cumming, IA
| Month | Gretna | Cumming | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 32.4°F | 14.0°F | 0.89 in | 30.9°F | 13.8°F | 1.08 in |
| February | 37.4°F | 17.5°F | 1.18 in | 35.7°F | 18.0°F | 1.34 in |
| March | 50.0°F | 28.3°F | 1.94 in | 49.2°F | 29.6°F | 2.17 in |
| April | 62.0°F | 38.5°F | 3.28 in | 62.0°F | 40.6°F | 4.02 in |
| May | 72.4°F | 50.7°F | 4.99 in | 72.4°F | 52.3°F | 5.24 in |
| June | 82.7°F | 61.8°F | 5.37 in | 81.9°F | 62.4°F | 5.26 in |
| July | 85.9°F | 65.8°F | 3.48 in | 85.6°F | 66.4°F | 3.82 in |
| August | 83.9°F | 63.5°F | 3.83 in | 83.6°F | 64.2°F | 4.17 in |
| September | 77.3°F | 54.3°F | 2.92 in | 76.9°F | 55.4°F | 3.18 in |
| October | 64.4°F | 41.5°F | 2.56 in | 63.4°F | 42.9°F | 2.78 in |
| November | 49.2°F | 28.7°F | 1.35 in | 48.3°F | 30.2°F | 1.91 in |
| December | 36.5°F | 18.7°F | 1.38 in | 35.9°F | 19.5°F | 1.58 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 →