Climate twins of Firth, ID
These are the US cities whose 12-month climate pattern most closely matches Firth'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: Firth vs its climate twin
Top match: Ephraim, UT
| Month | Firth | Ephraim | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 31.2°F | 16.8°F | 0.99 in | 36.2°F | 10.8°F | 0.90 in |
| February | 37.0°F | 20.5°F | 0.73 in | 42.3°F | 17.3°F | 0.96 in |
| March | 48.8°F | 29.1°F | 1.10 in | 53.7°F | 25.0°F | 1.02 in |
| April | 57.4°F | 34.7°F | 1.40 in | 60.6°F | 29.7°F | 1.11 in |
| May | 67.6°F | 42.8°F | 1.75 in | 71.4°F | 37.2°F | 1.30 in |
| June | 76.7°F | 49.8°F | 1.03 in | 83.0°F | 44.0°F | 0.78 in |
| July | 86.9°F | 56.0°F | 0.50 in | 91.2°F | 51.6°F | 0.62 in |
| August | 85.9°F | 54.2°F | 0.60 in | 88.7°F | 49.8°F | 0.81 in |
| September | 75.1°F | 46.0°F | 0.97 in | 79.3°F | 40.9°F | 1.08 in |
| October | 60.5°F | 35.0°F | 1.12 in | 65.3°F | 30.1°F | 1.08 in |
| November | 44.8°F | 25.5°F | 0.75 in | 50.6°F | 20.3°F | 0.88 in |
| December | 32.1°F | 17.5°F | 1.11 in | 36.6°F | 11.3°F | 1.15 in |
Cities that consider Firth their climate twin
These US cities have Firth in their top 3 most-similar list — meaning if you were to move from any of these places, Firth would feel familiar.
- Ephraim, UT (ranks Firth #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 →