Climate twins of Waltham, MA
These are the US cities whose 12-month climate pattern most closely matches Waltham'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: Waltham vs its climate twin
Top match: Erie, PA
| Month | Waltham | Erie | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 36.8°F | 18.2°F | 2.90 in | 35.2°F | 21.3°F | 3.41 in |
| February | 39.4°F | 19.3°F | 2.69 in | 36.5°F | 21.4°F | 2.52 in |
| March | 47.5°F | 27.2°F | 3.85 in | 44.3°F | 27.9°F | 3.08 in |
| April | 59.9°F | 37.1°F | 3.84 in | 56.8°F | 38.0°F | 3.47 in |
| May | 70.4°F | 46.7°F | 3.36 in | 68.3°F | 49.3°F | 3.50 in |
| June | 79.4°F | 56.2°F | 3.72 in | 77.1°F | 59.4°F | 3.70 in |
| July | 85.1°F | 62.0°F | 3.51 in | 81.1°F | 64.2°F | 3.33 in |
| August | 83.6°F | 60.3°F | 3.47 in | 79.9°F | 63.2°F | 3.35 in |
| September | 75.7°F | 51.8°F | 3.54 in | 73.7°F | 56.7°F | 4.32 in |
| October | 63.6°F | 40.8°F | 4.24 in | 62.3°F | 46.3°F | 4.38 in |
| November | 52.4°F | 32.4°F | 3.72 in | 50.5°F | 36.7°F | 3.75 in |
| December | 42.0°F | 24.0°F | 3.76 in | 40.2°F | 28.0°F | 4.17 in |
Cities that consider Waltham their climate twin
These US cities have Waltham in their top 3 most-similar list — meaning if you were to move from any of these places, Waltham would feel familiar.
- Erie, PA (ranks Waltham #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 →