Climate twins of St. Donatus, IA
These are the US cities whose 12-month climate pattern most closely matches St. Donatus'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: St. Donatus vs its climate twin
Top match: Haverhill, IA
| Month | St. Donatus | Haverhill | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 26.9°F | 10.0°F | 1.23 in | 27.5°F | 9.0°F | 0.97 in |
| February | 31.4°F | 13.6°F | 1.53 in | 32.3°F | 13.0°F | 1.16 in |
| March | 44.5°F | 24.4°F | 2.25 in | 45.4°F | 24.9°F | 2.10 in |
| April | 57.4°F | 36.2°F | 3.89 in | 59.5°F | 35.9°F | 3.82 in |
| May | 68.9°F | 47.4°F | 4.38 in | 70.7°F | 48.5°F | 4.94 in |
| June | 78.2°F | 58.3°F | 6.02 in | 80.4°F | 59.2°F | 5.93 in |
| July | 82.0°F | 61.7°F | 4.93 in | 83.5°F | 62.7°F | 4.58 in |
| August | 80.3°F | 59.5°F | 4.19 in | 81.5°F | 59.7°F | 4.37 in |
| September | 74.1°F | 50.5°F | 3.86 in | 75.4°F | 50.6°F | 3.85 in |
| October | 60.9°F | 39.3°F | 3.02 in | 62.2°F | 38.6°F | 2.66 in |
| November | 45.6°F | 27.7°F | 2.48 in | 46.5°F | 26.3°F | 2.10 in |
| December | 32.6°F | 16.8°F | 1.82 in | 33.5°F | 15.6°F | 1.39 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 →