Climate twins of Portage Des Sioux, MO
These are the US cities whose 12-month climate pattern most closely matches Portage Des Sioux'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: Portage Des Sioux vs its climate twin
Top match: Russellville, IL
| Month | Portage Des Sioux | Russellville | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 39.7°F | 21.9°F | 2.49 in | 39.4°F | 22.8°F | 3.16 in |
| February | 45.1°F | 25.6°F | 1.89 in | 44.2°F | 26.5°F | 2.16 in |
| March | 56.4°F | 34.4°F | 3.08 in | 55.1°F | 34.6°F | 3.16 in |
| April | 68.2°F | 45.1°F | 4.24 in | 67.3°F | 44.9°F | 4.24 in |
| May | 77.3°F | 55.9°F | 4.60 in | 76.8°F | 56.0°F | 4.85 in |
| June | 85.9°F | 64.9°F | 4.55 in | 85.3°F | 64.2°F | 4.38 in |
| July | 89.1°F | 68.1°F | 3.74 in | 87.6°F | 67.2°F | 4.22 in |
| August | 87.8°F | 66.0°F | 3.68 in | 86.8°F | 65.1°F | 2.94 in |
| September | 81.2°F | 57.1°F | 2.97 in | 81.6°F | 56.9°F | 2.94 in |
| October | 69.3°F | 45.8°F | 2.66 in | 69.4°F | 45.9°F | 3.51 in |
| November | 55.4°F | 34.6°F | 3.15 in | 54.6°F | 35.1°F | 3.44 in |
| December | 44.1°F | 27.0°F | 2.35 in | 43.4°F | 27.4°F | 2.66 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 →