SeasonMapBoston vs Chicago: which is better, month by month
Chicago beats Boston in 1 of 12 months — its lead peaks in March (64 vs 59) — and they are within 3 points in April to February.
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 Chicago — all 12 months
| Month | Boston | Chicago | Winner | Gap |
|---|---|---|---|---|
| January | 41Ffreezing, rainy, clean air | 40Ffreezing, a little rain, clean air | Tie | 1 |
| February | 51Dcold, a little rain, clean air | 49Ffreezing, a little rain, clean air | Tie | 2 |
| March | 59Dcold, rainy, clean air | 64Ccold, a little rain, clean air | Chicago | 5 |
| April | 70Bcool, rainy, clean air | 71Bcool, rainy, clean air | Tie | 1 |
| May | 86Anice, a little rain, clean air | 83Anice, rainy, muggy air | Tie | 3 |
| June | 89Awarm, a little rain | 86Awarm, rainy | Tie | 3 |
| July | 76Bhot, rainy | 76Bhot, rainy, muggy air | Tie | 0 |
| August | 80Ahot, rainy | 81Ahot, a little rain | Tie | 1 |
| September | 90Swarm, rainy, clean air | 91Swarm, a little rain, clean air | Tie | 1 |
| October | 74Bnice, rainy, clean air | 73Bnice, rainy, clean air | Tie | 1 |
| November | 63Ccold, rainy, clean air | 62Ccold, a little rain, clean air | Tie | 1 |
| December | 46Fcold, rainy, clean air | 46Fcold, a little rain, clean air | Tie | 0 |
A month is a tie when the two are within 3 points. The widest gap is March (59 vs 64). Tap a month for that month's temperature, rain, humidity and air quality side by side.