Climate twins of Carol Stream, IL
These are the US cities whose 12-month climate pattern most closely matches Carol Stream'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: Carol Stream vs its climate twin
Top match: Millersburg, IN
| Month | Carol Stream | Millersburg | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 30.5°F | 16.1°F | 1.27 in | 31.9°F | 18.1°F | 1.73 in |
| February | 34.9°F | 19.0°F | 1.24 in | 35.4°F | 20.3°F | 1.59 in |
| March | 47.0°F | 28.3°F | 1.97 in | 47.0°F | 28.5°F | 2.02 in |
| April | 59.6°F | 37.9°F | 3.44 in | 59.9°F | 38.3°F | 3.39 in |
| May | 70.9°F | 48.7°F | 4.34 in | 70.9°F | 49.6°F | 4.20 in |
| June | 80.6°F | 58.9°F | 3.65 in | 80.1°F | 59.6°F | 3.47 in |
| July | 84.0°F | 63.3°F | 3.62 in | 83.2°F | 62.3°F | 3.67 in |
| August | 82.0°F | 61.8°F | 3.84 in | 81.3°F | 60.3°F | 3.97 in |
| September | 75.5°F | 53.7°F | 3.00 in | 75.2°F | 52.8°F | 2.87 in |
| October | 62.4°F | 42.0°F | 2.99 in | 62.4°F | 42.6°F | 2.98 in |
| November | 47.7°F | 31.1°F | 2.20 in | 48.3°F | 32.7°F | 2.83 in |
| December | 35.4°F | 21.4°F | 1.67 in | 36.6°F | 24.0°F | 1.87 in |
Cities that consider Carol Stream their climate twin
These US cities have Carol Stream in their top 3 most-similar list — meaning if you were to move from any of these places, Carol Stream would feel familiar.
- Millersburg, IN (ranks Carol Stream #2)
- Middlebury, IN (ranks Carol Stream #2)
- Milford, IN (ranks Carol Stream #2)
- Fulton, IL (ranks Carol Stream #3)
- Andover, IA (ranks Carol Stream #3)
- Goose Lake, IA (ranks Carol Stream #2)
- Miles, IA (ranks Carol Stream #2)
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 →