SeasonMapChicago vs Napa: which is better, month by month
Napa beats Chicago in 11 of 12 months — its lead peaks in January (64 vs 40) — and they are within 3 points in 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 Napa — all 12 months
| Month | Chicago | Napa | Winner | Gap |
|---|---|---|---|---|
| January | 40Ffreezing, a little rain, clean air | 64Ccool, soaked, clean air | Napa | 24 |
| February | 49Ffreezing, a little rain, clean air | 73Bcool, rainy, clean air | Napa | 24 |
| March | 64Ccold, a little rain, clean air | 77Bnice, rainy, clean air | Napa | 13 |
| April | 71Bcool, rainy, clean air | 93Snice, dry, clean air | Napa | 22 |
| May | 83Anice, rainy, muggy air | 95Swarm, dry, clean air | Napa | 12 |
| June | 86Awarm, rainy | 91Swarm, dry, clean air | Napa | 5 |
| July | 76Bhot, rainy, muggy air | 92Shot, dry, clean air | Napa | 16 |
| August | 81Ahot, a little rain | 90Shot, dry, clean air | Napa | 9 |
| September | 91Swarm, a little rain, clean air | 88Ahot, dry, clean air | Tie | 3 |
| October | 73Bnice, rainy, clean air | 86Awarm, a little rain, clean air | Napa | 13 |
| November | 62Ccold, a little rain, clean air | 76Bnice, a little rain, clean air | Napa | 14 |
| December | 46Fcold, a little rain, clean air | 63Ccool, rainy, clean air | Napa | 17 |
A month is a tie when the two are within 3 points. The widest gap is January (40 vs 64). Tap a month for that month's temperature, rain, humidity and air quality side by side.