Climate twins of Portsmouth, VA
These are the US cities whose 12-month climate pattern most closely matches Portsmouth'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: Portsmouth vs its climate twin
Top match: Society Hill, SC
| Month | Portsmouth | Society Hill | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 50.0°F | 34.0°F | 2.93 in | 54.3°F | 31.4°F | 3.51 in |
| February | 52.8°F | 35.4°F | 2.55 in | 57.7°F | 34.0°F | 3.06 in |
| March | 59.4°F | 41.3°F | 3.47 in | 65.1°F | 40.4°F | 3.76 in |
| April | 69.5°F | 50.3°F | 3.28 in | 74.2°F | 49.1°F | 3.31 in |
| May | 77.0°F | 59.5°F | 3.55 in | 81.0°F | 58.1°F | 3.66 in |
| June | 84.4°F | 68.0°F | 4.64 in | 87.5°F | 66.7°F | 4.79 in |
| July | 88.7°F | 72.6°F | 5.21 in | 90.5°F | 70.5°F | 5.18 in |
| August | 86.3°F | 71.5°F | 5.30 in | 88.6°F | 69.4°F | 5.09 in |
| September | 80.8°F | 66.7°F | 5.14 in | 83.3°F | 63.3°F | 5.35 in |
| October | 71.7°F | 55.5°F | 3.58 in | 74.3°F | 51.0°F | 3.90 in |
| November | 61.4°F | 44.7°F | 3.14 in | 64.6°F | 40.0°F | 3.27 in |
| December | 53.9°F | 37.9°F | 2.89 in | 56.9°F | 34.3°F | 3.74 in |
Cities that consider Portsmouth their climate twin
These US cities have Portsmouth in their top 3 most-similar list — meaning if you were to move from any of these places, Portsmouth would feel familiar.
- Society Hill, SC (ranks Portsmouth #2)
- Cheraw, SC (ranks Portsmouth #2)
- Fayetteville, NC (ranks Portsmouth #1)
- Wade, NC (ranks Portsmouth #1)
- Eastover, NC (ranks Portsmouth #1)
- Autryville, NC (ranks Portsmouth #1)
- Stedman, NC (ranks Portsmouth #1)
- Sanford, NC (ranks Portsmouth #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 →