Climate twins of Larchwood, IA
These are the US cities whose 12-month climate pattern most closely matches Larchwood'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: Larchwood vs its climate twin
Top match: Howard Lake, MN
| Month | Larchwood | Howard Lake | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 25.3°F | 5.8°F | 0.56 in | 21.0°F | 2.0°F | 0.58 in |
| February | 30.6°F | 10.5°F | 0.75 in | 26.0°F | 5.8°F | 0.85 in |
| March | 43.7°F | 22.0°F | 1.31 in | 39.0°F | 19.3°F | 1.38 in |
| April | 57.8°F | 34.3°F | 2.88 in | 54.8°F | 33.8°F | 2.70 in |
| May | 69.8°F | 46.7°F | 4.08 in | 68.4°F | 47.1°F | 3.97 in |
| June | 79.8°F | 58.2°F | 4.66 in | 77.9°F | 58.1°F | 4.42 in |
| July | 83.3°F | 61.8°F | 3.55 in | 82.3°F | 62.0°F | 3.49 in |
| August | 80.2°F | 59.0°F | 2.99 in | 79.9°F | 59.5°F | 3.43 in |
| September | 73.6°F | 50.3°F | 2.90 in | 73.1°F | 50.6°F | 3.30 in |
| October | 60.0°F | 36.4°F | 2.21 in | 58.1°F | 37.1°F | 2.47 in |
| November | 43.5°F | 23.0°F | 1.15 in | 40.8°F | 23.4°F | 1.25 in |
| December | 29.4°F | 11.3°F | 0.77 in | 26.4°F | 10.9°F | 0.85 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 →