SeasonMapSeoul vs Shanghai: which is better, month by month
Shanghai beats Seoul in 4 of 12 months — its lead peaks in December (68 vs 52) — while Seoul wins May, June and September; they are within 3 points in the other 5 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.
Seoul vs Shanghai — all 12 months
| Month | Seoul | Shanghai | Winner | Gap |
|---|---|---|---|---|
| January | 47Ffreezing, dry | 62Ccold, a little rain, poor air quality | Shanghai | 15 |
| February | 59Dcold, dry | 66Ccold, a little rain, poor air quality | Shanghai | 7 |
| March | 74Bcool, a little rain | 73Bcool, rainy, poor air quality | Tie | 1 |
| April | 85Anice, a little rain | 83Anice, rainy, poor air quality | Tie | 2 |
| May | 90Swarm, rainy | 79Bwarm, rainy, muggy air | Seoul | 11 |
| June | 78Bhot, rainy | 55Dhot, soaked, poor air quality | Seoul | 23 |
| July | 51Dsweltering, soaked, muggy air | 48Fsweltering, soaked, poor air quality | Tie | 3 |
| August | 54Dsweltering, soaked, muggy air | 57Dsweltering, rainy, poor air quality | Tie | 3 |
| September | 75Bhot, rainy, muggy air | 61Chot, soaked, muggy air | Seoul | 14 |
| October | 83Anice, a little rain | 84Awarm, a little rain, muggy air | Tie | 1 |
| November | 70Bcool, a little rain | 78Bnice, a little rain, poor air quality | Shanghai | 8 |
| December | 52Dcold, dry | 68Ccold, a little rain, poor air quality | Shanghai | 16 |
A month is a tie when the two are within 3 points. The widest gap is June (78 vs 55). Tap a month for that month's temperature, rain, humidity and air quality side by side.