Climate twins of Port Jefferson, NY
These are the US cities whose 12-month climate pattern most closely matches Port Jefferson'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: Port Jefferson vs its climate twin
Top match: Manchester, MD
| Month | Port Jefferson | Manchester | ||||
|---|---|---|---|---|---|---|
| High | Low | Precip | High | Low | Precip | |
| January | 41.0°F | 26.3°F | 3.71 in | 39.5°F | 23.7°F | 3.58 in |
| February | 42.9°F | 27.8°F | 3.20 in | 42.9°F | 25.3°F | 2.94 in |
| March | 50.0°F | 32.8°F | 4.65 in | 51.8°F | 31.9°F | 4.14 in |
| April | 63.7°F | 42.8°F | 4.42 in | 64.5°F | 41.8°F | 3.84 in |
| May | 71.7°F | 51.4°F | 3.89 in | 73.2°F | 51.3°F | 3.96 in |
| June | 78.2°F | 61.1°F | 3.93 in | 80.8°F | 60.0°F | 3.80 in |
| July | 83.1°F | 67.5°F | 3.88 in | 84.9°F | 64.4°F | 4.73 in |
| August | 81.8°F | 67.0°F | 4.02 in | 83.1°F | 62.6°F | 4.19 in |
| September | 74.7°F | 61.3°F | 4.30 in | 76.7°F | 56.3°F | 5.11 in |
| October | 64.8°F | 48.8°F | 4.24 in | 65.4°F | 45.4°F | 4.19 in |
| November | 56.0°F | 40.3°F | 3.70 in | 53.9°F | 35.9°F | 3.36 in |
| December | 46.1°F | 32.1°F | 4.56 in | 43.7°F | 28.4°F | 4.04 in |
Cities that consider Port Jefferson their climate twin
These US cities have Port Jefferson in their top 3 most-similar list — meaning if you were to move from any of these places, Port Jefferson would feel familiar.
- Bridgeton, NJ (ranks Port Jefferson #3)
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 →