Climate twins of Irmo, SC
These are the US cities whose 12-month climate pattern most closely matches Irmo'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: Irmo vs its climate twin
Top match: Winston-Salem, NC
| Month | Irmo | Winston-Salem | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 54.0°F | 29.0°F | 3.93 in | 48.8°F | 30.7°F | 3.35 in |
| February | 57.6°F | 31.1°F | 3.45 in | 52.8°F | 33.2°F | 2.89 in |
| March | 65.1°F | 36.5°F | 3.98 in | 60.8°F | 40.1°F | 3.60 in |
| April | 73.7°F | 44.8°F | 2.91 in | 70.6°F | 48.3°F | 3.71 in |
| May | 80.5°F | 54.8°F | 3.45 in | 77.9°F | 57.0°F | 3.76 in |
| June | 87.0°F | 64.0°F | 4.07 in | 84.9°F | 65.4°F | 3.64 in |
| July | 90.3°F | 68.0°F | 4.15 in | 88.0°F | 69.2°F | 4.24 in |
| August | 88.3°F | 67.6°F | 5.11 in | 86.1°F | 67.9°F | 4.51 in |
| September | 83.3°F | 60.0°F | 3.80 in | 80.1°F | 61.2°F | 3.86 in |
| October | 74.0°F | 47.2°F | 3.29 in | 70.6°F | 49.3°F | 3.28 in |
| November | 63.9°F | 36.0°F | 3.20 in | 60.1°F | 39.1°F | 3.06 in |
| December | 56.2°F | 31.2°F | 4.19 in | 51.7°F | 33.6°F | 3.30 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 →