SeasonMapChicago vs Indianapolis: which is better, month by month
Indianapolis beats Chicago in 3 of 12 months — its lead peaks in October (82 vs 73) — while Chicago wins June to July; they are within 3 points in the other 7 months.
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 Indianapolis — all 12 months
| Month | Chicago | Indianapolis | Winner | Gap |
|---|---|---|---|---|
| January | 40Ffreezing, a little rain, clean air | 41Ffreezing, a little rain, clean air | Tie | 1 |
| February | 49Ffreezing, a little rain, clean air | 54Dcold, a little rain, clean air | Indianapolis | 5 |
| March | 64Ccold, a little rain, clean air | 63Ccold, rainy, clean air | Tie | 1 |
| April | 71Bcool, rainy, clean air | 74Bnice, rainy, clean air | Tie | 3 |
| May | 83Anice, rainy, muggy air | 88Anice, rainy, clean air | Indianapolis | 5 |
| June | 86Awarm, rainy | 79Bhot, rainy | Chicago | 7 |
| July | 76Bhot, rainy, muggy air | 69Chot, rainy | Chicago | 7 |
| August | 81Ahot, a little rain | 78Bhot, rainy | Tie | 3 |
| September | 91Swarm, a little rain, clean air | 89Awarm, a little rain, clean air | Tie | 2 |
| October | 73Bnice, rainy, clean air | 82Anice, a little rain, clean air | Indianapolis | 9 |
| November | 62Ccold, a little rain, clean air | 64Ccold, a little rain, clean air | Tie | 2 |
| December | 46Fcold, a little rain, clean air | 49Fcold, a little rain, clean air | Tie | 3 |
A month is a tie when the two are within 3 points. The widest gap is October (73 vs 82). Tap a month for that month's temperature, rain, humidity and air quality side by side.