Climate twins of South Bend, IN
These are the US cities whose 12-month climate pattern most closely matches South Bend'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: South Bend vs its climate twin
Top match: Lock Haven, PA
| Month | South Bend | Lock Haven | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 31.8°F | 17.1°F | 2.71 in | 34.9°F | 18.3°F | 2.76 in |
| February | 35.0°F | 18.8°F | 2.32 in | 38.1°F | 19.1°F | 2.15 in |
| March | 46.6°F | 27.4°F | 2.44 in | 47.8°F | 26.5°F | 3.14 in |
| April | 59.2°F | 38.1°F | 3.59 in | 61.8°F | 36.4°F | 3.56 in |
| May | 70.4°F | 49.5°F | 4.32 in | 72.7°F | 47.3°F | 4.00 in |
| June | 79.9°F | 59.4°F | 4.23 in | 80.3°F | 56.7°F | 3.84 in |
| July | 83.0°F | 63.0°F | 4.14 in | 84.8°F | 61.2°F | 4.11 in |
| August | 81.2°F | 61.3°F | 4.23 in | 83.0°F | 59.7°F | 4.17 in |
| September | 75.5°F | 53.6°F | 3.67 in | 75.8°F | 52.6°F | 4.25 in |
| October | 62.6°F | 41.9°F | 3.97 in | 63.5°F | 40.6°F | 3.76 in |
| November | 48.2°F | 32.0°F | 2.86 in | 50.5°F | 30.9°F | 2.96 in |
| December | 36.8°F | 23.2°F | 2.39 in | 39.5°F | 24.1°F | 3.02 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 →