SeasonMapSan Juan vs Ulaanbaatar: which is better, month by month
San Juan and Ulaanbaatar split the year 5–5 — San Juan wins November to March, Ulaanbaatar wins May to September, and they are within 3 points in April and October.
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.
San Juan vs Ulaanbaatar — all 12 months
| Month | San Juan | Ulaanbaatar | Winner | Gap |
|---|---|---|---|---|
| January | 77Bhot, a little rain, clean air | 32Ffreezing, dry | San Juan | 45 |
| February | 75Bhot, a little rain, clean air | 35Ffreezing, dry | San Juan | 40 |
| March | 77Bhot, a little rain, clean air | 53Dfreezing, dry | San Juan | 24 |
| April | 72Bhot, rainy, clean air | 70Bcold, dry, clean air | Tie | 2 |
| May | 70Bsweltering, rainy, clean air | 81Acool, dry, clean air | Ulaanbaatar | 11 |
| June | 70Bsweltering, a little rain, clean air | 93Snice, a little rain, clean air | Ulaanbaatar | 23 |
| July | 66Csweltering, rainy, clean air | 90Swarm, a little rain, clean air | Ulaanbaatar | 24 |
| August | 64Csweltering, rainy, clean air | 87Anice, a little rain, clean air | Ulaanbaatar | 23 |
| September | 61Csweltering, rainy, clean air | 78Bcool, a little rain, clean air | Ulaanbaatar | 17 |
| October | 63Csweltering, rainy, clean air | 63Ccold, dry, clean air | Tie | 0 |
| November | 64Csweltering, soaked, clean air | 40Ffreezing, dry, reliable snow | San Juan | 24 |
| December | 73Bhot, a little rain, clean air | 29Ffreezing, dry, poor air quality | San Juan | 44 |
A month is a tie when the two are within 3 points. The widest gap is January (77 vs 32). Tap a month for that month's temperature, rain, humidity and air quality side by side.