Climate twins of Shannon City, IA
These are the US cities whose 12-month climate pattern most closely matches Shannon City'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: Shannon City vs its climate twin
Top match: Olds, IA
| Month | Shannon City | Olds | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 30.4°F | 12.1°F | 0.94 in | 31.4°F | 12.5°F | 1.42 in |
| February | 35.5°F | 16.1°F | 1.32 in | 36.6°F | 16.5°F | 1.68 in |
| March | 48.2°F | 26.9°F | 2.19 in | 49.3°F | 26.9°F | 2.31 in |
| April | 60.5°F | 37.6°F | 4.05 in | 62.6°F | 37.7°F | 3.91 in |
| May | 70.1°F | 49.7°F | 5.27 in | 72.3°F | 48.7°F | 5.05 in |
| June | 79.4°F | 59.8°F | 5.27 in | 81.1°F | 58.1°F | 5.11 in |
| July | 83.5°F | 64.2°F | 4.14 in | 84.8°F | 62.2°F | 4.36 in |
| August | 82.1°F | 61.7°F | 4.10 in | 83.3°F | 60.2°F | 3.85 in |
| September | 75.5°F | 52.9°F | 4.11 in | 77.1°F | 51.9°F | 4.13 in |
| October | 63.1°F | 40.8°F | 2.97 in | 64.3°F | 40.5°F | 2.90 in |
| November | 48.2°F | 28.3°F | 2.12 in | 49.5°F | 28.6°F | 2.05 in |
| December | 35.9°F | 18.1°F | 1.49 in | 36.6°F | 18.4°F | 1.68 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 →