Chiang Mai vs Ulaanbaatar in September
Ulaanbaatar is the better pick in September — 82 vs 54 on SeasonMap's comfort score. Ulaanbaatar is cool, a little rain, clean air, while Chiang Mai is sweltering, soaked, very humid.
Chiang Mai vs Ulaanbaatar — September climate, side by side
| Chiang Mai | Ulaanbaatar | |
|---|---|---|
| Comfort score | 54/100 (D) | 82/100 (A) |
| Feels-like high | 36°C | 14°C |
| Avg high / low | 30° / 23° | 17° / 4° |
| Rainfall | 237 mm | 39 mm |
| Rainy days | 23 | 7 |
| Humidity | 87% | 64% |
| Air quality (AQI) | 53 | 36 |
Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.
Chiang Mai vs Ulaanbaatar in September — FAQ
- Is September better in Chiang Mai or Ulaanbaatar?
- Ulaanbaatar is the better pick in September — 82 vs 54 on SeasonMap's comfort score. Ulaanbaatar is cool, a little rain, clean air, while Chiang Mai is sweltering, soaked, very humid.
- What is the weather like in Chiang Mai vs Ulaanbaatar in September?
- In September, Chiang Mai averages 30°C high / 23°C low with about 237 mm of rain; Ulaanbaatar averages 17°C high / 4°C low with about 39 mm.