Climate twins of Heppner, OR
These are the US cities whose 12-month climate pattern most closely matches Heppner'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: Heppner vs its climate twin
Top match: Riggins, ID
| Month | Heppner | Riggins | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 43.6°F | 27.6°F | 1.32 in | 40.5°F | 24.6°F | 1.31 in |
| February | 47.4°F | 29.2°F | 1.07 in | 46.1°F | 25.7°F | 1.40 in |
| March | 54.7°F | 33.6°F | 1.36 in | 54.9°F | 30.3°F | 1.81 in |
| April | 60.8°F | 37.8°F | 1.46 in | 62.1°F | 34.6°F | 2.03 in |
| May | 69.4°F | 44.5°F | 1.71 in | 70.7°F | 41.1°F | 2.17 in |
| June | 76.6°F | 49.5°F | 1.35 in | 77.7°F | 46.9°F | 1.72 in |
| July | 86.8°F | 55.1°F | 0.31 in | 89.8°F | 52.4°F | 0.76 in |
| August | 86.1°F | 54.7°F | 0.28 in | 90.0°F | 52.1°F | 0.73 in |
| September | 77.3°F | 48.3°F | 0.43 in | 79.5°F | 45.4°F | 1.16 in |
| October | 63.8°F | 39.5°F | 1.17 in | 63.5°F | 36.3°F | 1.48 in |
| November | 51.0°F | 32.2°F | 1.37 in | 48.3°F | 29.2°F | 1.43 in |
| December | 42.5°F | 27.2°F | 1.26 in | 39.6°F | 24.5°F | 1.44 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 →