Ulaanbaatar weather in May
May in Ulaanbaatar: cool, a little rain, with clean air — a great time to visit.
#5 of 12 months in Ulaanbaatar · #367 of 604 destinations to visit in May · comfort 79/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Ulaanbaatar climate normals — May
| Daytime high | 15°C / 59°F | 🙂 cool |
|---|---|---|
| Nighttime low | 2°C / 35°F | |
| Feels like (high) | 11°C / 52°F | |
| Rainfall | 31 mm / 1.2 in | 🌦 some rain |
| Rainy days | 7 days | |
| Humidity | 46% | 🍃 comfortable |
| Dew point | -3°C / 26°F | |
| Sunshine | 11.9 h/day | |
| Daylight | 15.2 h | |
| Wind | 20 km/h / 12 mph | |
| Snowfall | 9.3 cm / 3.7 in | |
| Air quality (US AQI) | 46 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Ulaanbaatar in May — FAQ
- Is May a good time to visit Ulaanbaatar?
- May in Ulaanbaatar: cool, a little rain, with clean air — a great time to visit. It ranks #5 of 12 months for Ulaanbaatar on SeasonMap's comfort score (79/100).
- What is the weather like in Ulaanbaatar in May?
- In May, Ulaanbaatar averages a daily high of 15.2°C and a low of 1.7°C, with about 30.5 mm of rain over roughly 7.2 rainy days.
- What is the air quality in Ulaanbaatar in May?
- Ulaanbaatar has a mean US Air Quality Index of about 46 in May.
- Does it snow in Ulaanbaatar in May?
- Ulaanbaatar sees roughly 9.3 cm of snowfall in May.