SeasonMapBoston vs Philadelphia: which is better, month by month
Philadelphia beats Boston in 8 of 12 months — its lead peaks in January (53 vs 41) — while Boston wins June to September.
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.
Boston vs Philadelphia — all 12 months
| Month | Boston | Philadelphia | Winner | Gap |
|---|---|---|---|---|
| January | 41Ffreezing, rainy, clean air | 53Dcold, rainy, clean air | Philadelphia | 12 |
| February | 51Dcold, a little rain, clean air | 60Ccold, rainy | Philadelphia | 9 |
| March | 59Dcold, rainy, clean air | 69Ccool, rainy, clean air | Philadelphia | 10 |
| April | 70Bcool, rainy, clean air | 82Anice, rainy, clean air | Philadelphia | 12 |
| May | 86Anice, a little rain, clean air | 91Swarm, rainy | Philadelphia | 5 |
| June | 89Awarm, a little rain | 79Bhot, rainy | Boston | 10 |
| July | 76Bhot, rainy | 65Csweltering, rainy | Boston | 11 |
| August | 80Ahot, rainy | 72Bhot, rainy | Boston | 8 |
| September | 90Swarm, rainy, clean air | 81Awarm, rainy, clean air | Boston | 9 |
| October | 74Bnice, rainy, clean air | 85Anice, a little rain, clean air | Philadelphia | 11 |
| November | 63Ccold, rainy, clean air | 71Bcool, a little rain, clean air | Philadelphia | 8 |
| December | 46Fcold, rainy, clean air | 56Dcold, rainy, clean air | Philadelphia | 10 |
A month is a tie when the two are within 3 points. The widest gap is January (41 vs 53). Tap a month for that month's temperature, rain, humidity and air quality side by side.