SeasonMapKaruizawa vs Sapporo: which is better, month by month
Karuizawa beats Sapporo in 6 of 12 months — its lead peaks in December (58 vs 42) — while Sapporo wins May, June, July, September and October; they are within 3 points in April.
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.
Karuizawa vs Sapporo — all 12 months
| Month | Karuizawa | Sapporo | Winner | Gap |
|---|---|---|---|---|
| January | 51Dfreezing, a little rain, clean air | 40Ffreezing, a little rain, clean air | Karuizawa | 11 |
| February | 54Dfreezing, a little rain, clean air | 45Ffreezing, a little rain, clean air | Karuizawa | 9 |
| March | 63Ccold, rainy, reliable snow | 57Dcold, a little rain, muggy air | Karuizawa | 6 |
| April | 73Bcool, rainy | 74Bcool, rainy, muggy air | Tie | 1 |
| May | 79Bnice, rainy, muggy air | 84Anice, rainy, clean air | Sapporo | 5 |
| June | 77Bnice, soaked, muggy air | 89Anice, rainy, clean air | Sapporo | 12 |
| July | 71Bhot, soaked, clean air | 79Bhot, rainy, clean air | Sapporo | 8 |
| August | 75Bhot, soaked, clean air | 67Chot, soaked, clean air | Karuizawa | 8 |
| September | 78Bnice, soaked, clean air | 86Awarm, rainy, clean air | Sapporo | 8 |
| October | 66Ccool, soaked, clean air | 73Bcool, rainy, clean air | Sapporo | 7 |
| November | 69Ccold, a little rain, clean air | 59Dcold, rainy, clean air | Karuizawa | 10 |
| December | 58Dcold, a little rain, clean air | 42Ffreezing, a little rain, clean air | Karuizawa | 16 |
A month is a tie when the two are within 3 points. The widest gap is December (58 vs 42). Tap a month for that month's temperature, rain, humidity and air quality side by side.