Climate twins of Gretna, VA
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: Mount Airy, MD
| Month | Gretna | Mount Airy | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 47.3°F | 24.2°F | 4.18 in | 39.1°F | 24.5°F | 3.41 in |
| February | 51.0°F | 25.7°F | 2.79 in | 42.6°F | 26.1°F | 2.98 in |
| March | 59.2°F | 31.8°F | 3.97 in | 51.6°F | 33.1°F | 4.04 in |
| April | 69.4°F | 40.6°F | 3.85 in | 63.9°F | 42.9°F | 3.62 in |
| May | 75.9°F | 50.8°F | 4.51 in | 72.5°F | 52.8°F | 4.35 in |
| June | 82.8°F | 59.9°F | 4.24 in | 80.2°F | 61.5°F | 4.67 in |
| July | 86.3°F | 64.7°F | 4.22 in | 84.3°F | 66.0°F | 4.49 in |
| August | 84.9°F | 63.2°F | 4.12 in | 82.6°F | 64.6°F | 4.18 in |
| September | 78.9°F | 56.0°F | 5.00 in | 75.7°F | 57.6°F | 4.76 in |
| October | 69.6°F | 42.9°F | 3.46 in | 64.5°F | 46.5°F | 4.01 in |
| November | 59.4°F | 31.9°F | 3.52 in | 53.3°F | 36.4°F | 3.49 in |
| December | 50.3°F | 27.0°F | 3.84 in | 43.5°F | 29.5°F | 3.89 in |
Cities that consider Gretna their climate twin
These US cities have Gretna in their top 3 most-similar list — meaning if you were to move from any of these places, Gretna would feel familiar.
- Thurmont, MD (ranks Gretna #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 →