Climate twins of Petersburg, ND
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: Martin, ND
| Month | Petersburg | Martin | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 13.7°F | -4.2°F | 0.44 in | 16.9°F | -1.8°F | 0.41 in |
| February | 18.6°F | -0.7°F | 0.45 in | 21.7°F | 1.8°F | 0.41 in |
| March | 31.3°F | 13.2°F | 0.50 in | 34.6°F | 15.1°F | 0.73 in |
| April | 49.7°F | 28.4°F | 0.94 in | 51.9°F | 28.9°F | 1.07 in |
| May | 64.9°F | 41.9°F | 2.79 in | 66.3°F | 42.0°F | 2.69 in |
| June | 74.3°F | 53.1°F | 3.84 in | 75.0°F | 52.9°F | 3.62 in |
| July | 78.9°F | 57.5°F | 3.61 in | 80.5°F | 56.9°F | 3.14 in |
| August | 78.3°F | 54.9°F | 2.51 in | 79.6°F | 53.7°F | 2.34 in |
| September | 68.9°F | 45.2°F | 2.12 in | 70.5°F | 44.5°F | 1.84 in |
| October | 52.3°F | 31.7°F | 1.66 in | 54.1°F | 30.8°F | 1.41 in |
| November | 34.0°F | 17.1°F | 0.73 in | 35.7°F | 16.4°F | 0.69 in |
| December | 19.9°F | 3.6°F | 0.64 in | 21.9°F | 4.4°F | 0.90 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 →