SeasonMapChicago vs Philadelphia: which is better, month by month
Philadelphia beats Chicago in 8 of 12 months — its lead peaks in January (53 vs 40) — while Chicago 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.
Chicago vs Philadelphia — all 12 months
| Month | Chicago | Philadelphia | Winner | Gap |
|---|---|---|---|---|
| January | 40Ffreezing, a little rain, clean air | 53Dcold, rainy, clean air | Philadelphia | 13 |
| February | 49Ffreezing, a little rain, clean air | 60Ccold, rainy | Philadelphia | 11 |
| March | 64Ccold, a little rain, clean air | 69Ccool, rainy, clean air | Philadelphia | 5 |
| April | 71Bcool, rainy, clean air | 82Anice, rainy, clean air | Philadelphia | 11 |
| May | 83Anice, rainy, muggy air | 91Swarm, rainy | Philadelphia | 8 |
| June | 86Awarm, rainy | 79Bhot, rainy | Chicago | 7 |
| July | 76Bhot, rainy, muggy air | 65Csweltering, rainy | Chicago | 11 |
| August | 81Ahot, a little rain | 72Bhot, rainy | Chicago | 9 |
| September | 91Swarm, a little rain, clean air | 81Awarm, rainy, clean air | Chicago | 10 |
| October | 73Bnice, rainy, clean air | 85Anice, a little rain, clean air | Philadelphia | 12 |
| November | 62Ccold, a little rain, clean air | 71Bcool, a little rain, clean air | Philadelphia | 9 |
| December | 46Fcold, a little rain, 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 (40 vs 53). Tap a month for that month's temperature, rain, humidity and air quality side by side.