Climate twins of Plainfield, IN
These are the US cities whose 12-month climate pattern most closely matches Plainfield'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: Plainfield vs its climate twin
Top match: Salem, IL
| Month | Plainfield | Salem | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 35.7°F | 19.4°F | 3.24 in | 38.4°F | 20.8°F | 3.07 in |
| February | 40.3°F | 22.7°F | 2.50 in | 43.4°F | 24.0°F | 2.56 in |
| March | 51.3°F | 31.8°F | 3.73 in | 54.0°F | 33.0°F | 3.73 in |
| April | 64.0°F | 42.9°F | 4.64 in | 66.2°F | 43.7°F | 4.69 in |
| May | 73.9°F | 53.6°F | 4.93 in | 75.7°F | 54.6°F | 4.99 in |
| June | 82.3°F | 62.9°F | 5.37 in | 84.5°F | 63.8°F | 5.08 in |
| July | 85.4°F | 66.6°F | 4.67 in | 87.8°F | 67.4°F | 4.07 in |
| August | 84.4°F | 64.9°F | 3.47 in | 86.6°F | 65.2°F | 3.80 in |
| September | 78.3°F | 57.3°F | 3.45 in | 80.4°F | 56.9°F | 3.54 in |
| October | 65.8°F | 44.7°F | 3.36 in | 68.7°F | 45.0°F | 3.44 in |
| November | 51.9°F | 34.2°F | 3.47 in | 54.3°F | 34.0°F | 3.99 in |
| December | 39.5°F | 25.0°F | 2.98 in | 42.8°F | 25.6°F | 2.93 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 →