Climate twins of Streamwood, IL
These are the US cities whose 12-month climate pattern most closely matches Streamwood'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: Streamwood vs its climate twin
Top match: Stanwood, IA
| Month | Streamwood | Stanwood | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 32.3°F | 13.7°F | 1.90 in | 28.7°F | 11.9°F | 1.41 in |
| February | 36.7°F | 16.1°F | 1.70 in | 33.1°F | 16.2°F | 1.45 in |
| March | 47.7°F | 25.3°F | 2.09 in | 46.8°F | 27.6°F | 2.14 in |
| April | 61.0°F | 35.4°F | 3.64 in | 60.7°F | 38.2°F | 3.79 in |
| May | 72.9°F | 46.5°F | 4.66 in | 71.9°F | 50.6°F | 4.74 in |
| June | 83.4°F | 57.0°F | 4.72 in | 81.5°F | 61.0°F | 4.74 in |
| July | 86.9°F | 61.4°F | 3.34 in | 83.7°F | 63.9°F | 4.08 in |
| August | 84.8°F | 59.8°F | 4.45 in | 82.1°F | 61.1°F | 3.83 in |
| September | 78.1°F | 51.4°F | 3.58 in | 76.8°F | 52.9°F | 3.46 in |
| October | 64.8°F | 39.6°F | 3.51 in | 63.9°F | 40.6°F | 3.11 in |
| November | 49.8°F | 28.7°F | 2.51 in | 47.8°F | 29.2°F | 2.19 in |
| December | 37.7°F | 18.9°F | 1.92 in | 34.0°F | 18.5°F | 1.55 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 →