Climate twins of Petersburg, VA
These are the US cities whose 12-month climate pattern most closely matches Petersburg'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: Petersburg vs its climate twin
Top match: Danville, VA
| Month | Petersburg | Danville | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 49.1°F | 28.3°F | 3.02 in | 49.7°F | 26.5°F | 3.74 in |
| February | 52.2°F | 29.1°F | 2.70 in | 53.6°F | 28.5°F | 3.06 in |
| March | 60.1°F | 36.1°F | 4.37 in | 61.6°F | 34.6°F | 4.10 in |
| April | 70.4°F | 45.6°F | 3.62 in | 72.4°F | 43.6°F | 3.88 in |
| May | 78.2°F | 55.0°F | 4.37 in | 79.8°F | 53.6°F | 4.43 in |
| June | 85.5°F | 64.2°F | 4.23 in | 87.0°F | 62.7°F | 4.14 in |
| July | 89.3°F | 69.0°F | 4.70 in | 90.8°F | 67.6°F | 4.81 in |
| August | 87.4°F | 67.3°F | 5.31 in | 89.0°F | 66.1°F | 4.07 in |
| September | 81.5°F | 60.8°F | 4.63 in | 82.7°F | 58.9°F | 4.58 in |
| October | 71.6°F | 48.0°F | 3.41 in | 72.4°F | 46.1°F | 3.63 in |
| November | 61.5°F | 37.3°F | 3.16 in | 61.6°F | 35.1°F | 3.34 in |
| December | 52.6°F | 30.6°F | 3.47 in | 52.6°F | 29.5°F | 3.36 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 →