Climate twins of Quincy, IL
These are the US cities whose 12-month climate pattern most closely matches Quincy'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: Quincy vs its climate twin
Top match: Henry, IL
| Month | Quincy | Henry | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 35.1°F | 18.9°F | 1.66 in | 33.8°F | 18.0°F | 2.07 in |
| February | 40.4°F | 22.7°F | 1.91 in | 38.3°F | 21.5°F | 2.06 in |
| March | 51.8°F | 32.0°F | 2.48 in | 51.4°F | 31.3°F | 2.65 in |
| April | 64.4°F | 42.9°F | 4.22 in | 64.5°F | 41.4°F | 4.00 in |
| May | 74.1°F | 54.2°F | 4.80 in | 75.0°F | 51.7°F | 4.76 in |
| June | 83.4°F | 63.9°F | 4.12 in | 84.4°F | 61.2°F | 4.29 in |
| July | 87.2°F | 67.6°F | 3.64 in | 87.0°F | 65.1°F | 3.97 in |
| August | 85.6°F | 65.7°F | 3.33 in | 85.6°F | 63.0°F | 3.33 in |
| September | 78.9°F | 57.1°F | 3.37 in | 79.6°F | 55.1°F | 3.30 in |
| October | 66.6°F | 45.4°F | 2.65 in | 66.6°F | 43.5°F | 3.16 in |
| November | 52.5°F | 33.8°F | 2.57 in | 51.2°F | 32.6°F | 2.63 in |
| December | 40.2°F | 24.5°F | 1.73 in | 38.3°F | 23.2°F | 2.17 in |
Cities that consider Quincy their climate twin
These US cities have Quincy in their top 3 most-similar list — meaning if you were to move from any of these places, Quincy would feel familiar.
- Coalton, IL (ranks Quincy #1)
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 →