Climate twins of Portola, CA
These are the US cities whose 12-month climate pattern most closely matches Portola'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: Portola vs its climate twin
Top match: Mammoth Lakes, CA
| Month | Portola | Mammoth Lakes | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 43.0°F | 19.3°F | 4.16 in | 41.2°F | 16.6°F | 4.20 in |
| February | 46.0°F | 21.4°F | 3.93 in | 41.0°F | 17.7°F | 3.77 in |
| March | 51.6°F | 25.3°F | 3.57 in | 45.5°F | 22.2°F | 3.28 in |
| April | 57.7°F | 29.1°F | 1.55 in | 51.2°F | 27.1°F | 1.54 in |
| May | 67.0°F | 35.1°F | 1.15 in | 60.4°F | 34.5°F | 1.49 in |
| June | 77.2°F | 40.1°F | 0.52 in | 70.3°F | 42.2°F | 0.47 in |
| July | 86.4°F | 44.6°F | 0.34 in | 77.8°F | 48.9°F | 0.51 in |
| August | 85.2°F | 42.6°F | 0.30 in | 77.4°F | 47.4°F | 0.49 in |
| September | 78.8°F | 37.1°F | 0.44 in | 71.3°F | 39.8°F | 0.47 in |
| October | 66.4°F | 29.7°F | 1.07 in | 60.7°F | 30.2°F | 1.43 in |
| November | 52.5°F | 24.1°F | 2.03 in | 49.3°F | 23.2°F | 2.00 in |
| December | 42.1°F | 19.4°F | 4.28 in | 41.4°F | 17.1°F | 4.07 in |
Cities that consider Portola their climate twin
These US cities have Portola in their top 3 most-similar list — meaning if you were to move from any of these places, Portola would feel familiar.
- Mammoth Lakes, CA (ranks Portola #1)
- Big Bear Lake, CA (ranks Portola #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 →