Climate twins of Irene, SD
These are the US cities whose 12-month climate pattern most closely matches Irene'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: Irene vs its climate twin
Top match: Milford, IA
| Month | Irene | Milford | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 26.9°F | 6.8°F | 0.44 in | 24.4°F | 7.5°F | 0.70 in |
| February | 31.9°F | 11.0°F | 0.63 in | 28.9°F | 11.6°F | 0.74 in |
| March | 44.9°F | 22.9°F | 1.38 in | 41.9°F | 23.6°F | 1.61 in |
| April | 58.5°F | 34.0°F | 2.69 in | 57.2°F | 35.2°F | 3.25 in |
| May | 70.2°F | 46.8°F | 3.87 in | 69.5°F | 47.7°F | 4.21 in |
| June | 80.4°F | 58.1°F | 4.29 in | 79.0°F | 58.5°F | 4.47 in |
| July | 84.4°F | 61.7°F | 3.05 in | 82.6°F | 62.4°F | 3.40 in |
| August | 81.9°F | 59.1°F | 3.20 in | 80.0°F | 60.0°F | 3.47 in |
| September | 75.4°F | 49.6°F | 3.12 in | 73.9°F | 51.8°F | 3.21 in |
| October | 61.5°F | 36.1°F | 2.32 in | 60.0°F | 38.5°F | 2.22 in |
| November | 45.1°F | 22.7°F | 1.23 in | 43.1°F | 24.5°F | 1.38 in |
| December | 31.3°F | 12.0°F | 0.66 in | 29.0°F | 13.2°F | 0.84 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 →