Climate twins of St. Charles, MO
These are the US cities whose 12-month climate pattern most closely matches St. Charles'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: St. Charles vs its climate twin
Top match: Bruceville, IN
| Month | St. Charles | Bruceville | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 39.5°F | 21.9°F | 2.74 in | 39.7°F | 21.6°F | 2.98 in |
| February | 44.7°F | 25.2°F | 2.86 in | 44.6°F | 24.2°F | 2.53 in |
| March | 55.2°F | 33.7°F | 3.63 in | 55.1°F | 32.9°F | 3.57 in |
| April | 66.8°F | 44.0°F | 5.11 in | 67.3°F | 43.9°F | 4.88 in |
| May | 76.0°F | 55.1°F | 5.45 in | 77.1°F | 54.8°F | 5.53 in |
| June | 84.1°F | 64.3°F | 4.35 in | 85.6°F | 63.6°F | 4.82 in |
| July | 88.0°F | 68.3°F | 4.20 in | 88.7°F | 66.4°F | 4.61 in |
| August | 86.8°F | 65.8°F | 4.07 in | 87.8°F | 64.3°F | 3.31 in |
| September | 80.4°F | 57.2°F | 3.08 in | 82.3°F | 56.5°F | 3.63 in |
| October | 68.8°F | 45.7°F | 3.50 in | 70.3°F | 45.0°F | 3.57 in |
| November | 55.3°F | 35.3°F | 3.73 in | 55.8°F | 34.5°F | 3.98 in |
| December | 44.1°F | 26.4°F | 2.99 in | 44.1°F | 26.4°F | 3.35 in |
Cities that consider St. Charles their climate twin
These US cities have St. Charles in their top 3 most-similar list — meaning if you were to move from any of these places, St. Charles would feel familiar.
- Conway, MO (ranks St. Charles #1)
- Lebanon, MO (ranks St. Charles #1)
- Phillipsburg, MO (ranks St. Charles #1)
- Stoutland, MO (ranks St. Charles #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 →