Climate twins of Monmouth, IL
These are the US cities whose 12-month climate pattern most closely matches Monmouth'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: Monmouth vs its climate twin
Top match: Seneca, IL
| Month | Monmouth | Seneca | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 31.4°F | 14.7°F | 1.85 in | 31.4°F | 14.2°F | 1.95 in |
| February | 36.2°F | 18.7°F | 1.98 in | 35.4°F | 17.2°F | 1.90 in |
| March | 49.7°F | 29.1°F | 2.61 in | 47.5°F | 27.2°F | 2.54 in |
| April | 62.8°F | 39.7°F | 3.95 in | 61.2°F | 37.3°F | 3.59 in |
| May | 72.9°F | 50.9°F | 5.18 in | 72.6°F | 48.5°F | 4.70 in |
| June | 81.2°F | 60.3°F | 4.53 in | 81.1°F | 58.1°F | 4.92 in |
| July | 84.1°F | 63.6°F | 3.96 in | 84.0°F | 61.9°F | 3.85 in |
| August | 82.8°F | 61.5°F | 3.92 in | 82.4°F | 60.5°F | 4.09 in |
| September | 77.3°F | 53.6°F | 3.70 in | 77.1°F | 52.9°F | 3.46 in |
| October | 64.8°F | 42.2°F | 3.01 in | 64.1°F | 41.2°F | 3.20 in |
| November | 49.2°F | 30.6°F | 2.58 in | 49.1°F | 30.0°F | 2.72 in |
| December | 36.5°F | 20.8°F | 2.15 in | 36.6°F | 20.5°F | 2.11 in |
Cities that consider Monmouth their climate twin
These US cities have Monmouth in their top 3 most-similar list — meaning if you were to move from any of these places, Monmouth would feel familiar.
- Seneca, IL (ranks Monmouth #2)
- Aurora, IL (ranks Monmouth #1)
- Montgomery, IL (ranks Monmouth #1)
- North Aurora, IL (ranks Monmouth #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 →