Climate twins of Springbrook, IA
These are the US cities whose 12-month climate pattern most closely matches Springbrook'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: Springbrook vs its climate twin
Top match: Island Lake, IL
| Month | Springbrook | Island Lake | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 28.9°F | 12.1°F | 1.30 in | 30.6°F | 12.9°F | 1.65 in |
| February | 33.5°F | 15.1°F | 1.58 in | 34.6°F | 16.2°F | 1.56 in |
| March | 45.7°F | 26.3°F | 2.16 in | 46.0°F | 25.9°F | 2.21 in |
| April | 59.3°F | 37.4°F | 3.77 in | 58.8°F | 36.6°F | 3.63 in |
| May | 71.1°F | 48.4°F | 4.21 in | 70.4°F | 47.2°F | 4.47 in |
| June | 81.1°F | 58.8°F | 5.58 in | 80.2°F | 57.0°F | 4.81 in |
| July | 84.6°F | 62.7°F | 4.33 in | 84.2°F | 61.5°F | 3.80 in |
| August | 82.7°F | 60.9°F | 3.78 in | 82.3°F | 59.7°F | 3.70 in |
| September | 75.9°F | 52.2°F | 3.65 in | 75.7°F | 51.4°F | 3.61 in |
| October | 62.6°F | 40.7°F | 3.18 in | 63.0°F | 39.6°F | 3.21 in |
| November | 47.2°F | 29.3°F | 2.34 in | 48.1°F | 29.4°F | 2.38 in |
| December | 34.2°F | 18.9°F | 1.93 in | 35.9°F | 19.3°F | 1.94 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 →