Climate twins of Hartsburg, IL
These are the US cities whose 12-month climate pattern most closely matches Hartsburg'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: Hartsburg vs its climate twin
Top match: Monticello, IN
| Month | Hartsburg | Monticello | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 34.5°F | 17.8°F | 2.17 in | 34.4°F | 19.2°F | 2.65 in |
| February | 39.5°F | 21.6°F | 1.92 in | 38.8°F | 22.3°F | 1.79 in |
| March | 51.7°F | 31.1°F | 2.70 in | 50.7°F | 31.4°F | 2.84 in |
| April | 64.4°F | 40.8°F | 4.24 in | 63.9°F | 41.0°F | 3.80 in |
| May | 74.8°F | 52.4°F | 4.37 in | 74.3°F | 51.6°F | 4.09 in |
| June | 83.3°F | 61.3°F | 4.16 in | 82.2°F | 60.1°F | 4.64 in |
| July | 85.5°F | 63.8°F | 4.91 in | 84.6°F | 63.2°F | 4.61 in |
| August | 84.0°F | 61.3°F | 3.47 in | 83.3°F | 61.3°F | 3.46 in |
| September | 79.2°F | 53.4°F | 3.30 in | 78.2°F | 53.6°F | 2.93 in |
| October | 66.3°F | 41.8°F | 3.42 in | 66.0°F | 43.5°F | 3.00 in |
| November | 51.4°F | 32.0°F | 2.88 in | 51.2°F | 33.5°F | 2.94 in |
| December | 39.2°F | 23.1°F | 2.29 in | 39.2°F | 24.5°F | 2.29 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 →