SeasonMapCharleston vs Philadelphia: which is better, month by month
Charleston beats Philadelphia in 6 of 12 months — its lead peaks in January (74 vs 53) — while Philadelphia wins May to September; they are within 3 points in October.
Each place is scored under the lens that suits its type. Comfort is SeasonMap's 0–100 estimate from ERA5 climate normals, not a forecast.
Charleston vs Philadelphia — all 12 months
| Month | Charleston | Philadelphia | Winner | Gap |
|---|---|---|---|---|
| January | 74Bcool, a little rain, clean air | 53Dcold, rainy, clean air | Charleston | 21 |
| February | 79Bnice, a little rain, clean air | 60Ccold, rainy | Charleston | 19 |
| March | 86Anice, a little rain | 69Ccool, rainy, clean air | Charleston | 17 |
| April | 90Snice, rainy, clean air | 82Anice, rainy, clean air | Charleston | 8 |
| May | 80Ahot, rainy, clean air | 91Swarm, rainy | Philadelphia | 11 |
| June | 66Chot, rainy, muggy air | 79Bhot, rainy | Philadelphia | 13 |
| July | 58Dsweltering, rainy, muggy air | 65Csweltering, rainy | Philadelphia | 7 |
| August | 59Dsweltering, soaked, muggy air | 72Bhot, rainy | Philadelphia | 13 |
| September | 69Chot, rainy, clean air | 81Awarm, rainy, clean air | Philadelphia | 12 |
| October | 85Awarm, a little rain, clean air | 85Anice, a little rain, clean air | Tie | 0 |
| November | 86Anice, a little rain, clean air | 71Bcool, a little rain, clean air | Charleston | 15 |
| December | 72Bcool, rainy, clean air | 56Dcold, rainy, clean air | Charleston | 16 |
A month is a tie when the two are within 3 points. The widest gap is January (74 vs 53). Tap a month for that month's temperature, rain, humidity and air quality side by side.