Climate twins of Grand Coulee, WA
These are the US cities whose 12-month climate pattern most closely matches Grand Coulee'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: Grand Coulee vs its climate twin
Top match: Filer, ID
| Month | Grand Coulee | Filer | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 32.7°F | 23.3°F | 1.15 in | 36.5°F | 21.8°F | 0.99 in |
| February | 39.5°F | 25.3°F | 0.88 in | 42.1°F | 24.9°F | 0.73 in |
| March | 50.7°F | 31.5°F | 1.07 in | 52.6°F | 32.2°F | 1.19 in |
| April | 60.6°F | 37.7°F | 0.97 in | 59.4°F | 36.9°F | 1.05 in |
| May | 70.8°F | 45.8°F | 1.11 in | 68.8°F | 45.0°F | 1.36 in |
| June | 77.8°F | 52.0°F | 1.15 in | 77.4°F | 52.2°F | 0.65 in |
| July | 87.6°F | 59.4°F | 0.49 in | 88.4°F | 59.7°F | 0.21 in |
| August | 86.9°F | 58.3°F | 0.33 in | 86.8°F | 58.3°F | 0.35 in |
| September | 76.8°F | 50.5°F | 0.36 in | 76.9°F | 48.9°F | 0.44 in |
| October | 60.2°F | 40.1°F | 0.94 in | 62.5°F | 38.0°F | 0.88 in |
| November | 43.0°F | 30.9°F | 1.20 in | 47.4°F | 28.2°F | 1.10 in |
| December | 33.1°F | 23.9°F | 1.42 in | 36.9°F | 22.5°F | 1.20 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 →