Climate twins of Ottawa, KS
These are the US cities whose 12-month climate pattern most closely matches Ottawa'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: Ottawa vs its climate twin
Top match: De Witt, MO
| Month | Ottawa | De Witt | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 39.9°F | 18.2°F | 1.22 in | 36.1°F | 19.5°F | 1.51 in |
| February | 45.5°F | 22.0°F | 1.57 in | 41.4°F | 23.3°F | 2.03 in |
| March | 56.0°F | 31.5°F | 2.29 in | 53.4°F | 33.3°F | 2.77 in |
| April | 65.9°F | 41.6°F | 3.79 in | 64.5°F | 43.5°F | 3.96 in |
| May | 75.2°F | 53.3°F | 5.82 in | 73.6°F | 54.9°F | 5.45 in |
| June | 84.4°F | 63.2°F | 5.55 in | 82.9°F | 64.6°F | 5.55 in |
| July | 89.3°F | 67.6°F | 3.75 in | 86.8°F | 68.7°F | 4.30 in |
| August | 88.2°F | 65.0°F | 4.63 in | 85.2°F | 66.5°F | 3.85 in |
| September | 80.3°F | 56.0°F | 4.05 in | 78.6°F | 57.7°F | 3.49 in |
| October | 68.7°F | 43.8°F | 3.08 in | 67.0°F | 45.9°F | 3.35 in |
| November | 54.8°F | 31.7°F | 2.39 in | 52.8°F | 34.2°F | 2.36 in |
| December | 43.4°F | 22.4°F | 1.71 in | 40.5°F | 24.3°F | 1.80 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 →