Ulaanbaatar air quality
Mongolia · Live AQI and hourly forecast for the next 5 days · valid Sat 01:00 local time
Moderate
Model estimate. Nearby measurements are shown separately.
Acceptable. Unusually sensitive people should ease off long, intense outdoor effort.
- Next 24 hours
- 32–153US AQI, highest around Sun 00:00
- Best time outside
- Sat 11:00–14:00US AQI about 33
- PM2.5 vs WHO guideline
- 1.3×20 µg/m³ over 24 h, guideline 15
- Cigarette equivalent
- ≈ 0.9 a dayBerkeley Earth rule of thumb
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Pollutants in Ulaanbaatar right now
| Pollutant | Now | Level | Next 24 h vs WHO |
|---|---|---|---|
| Fine particles PM2.5 | 17 µg/m³ | Moderate | 1.3× |
| Coarse particles PM10 | 18 µg/m³ | Good | 0.5× |
| Nitrogen dioxide NO2 | 12 µg/m³ | Good | 0.6× |
| Ozone O3 | 58 µg/m³ | Good | 0.7× |
| Sulphur dioxide SO2 | 19 µg/m³ | Good | 0.6× |
| Carbon monoxide CO | 442 µg/m³ | Good | 0.3× |
| Aerosol optical depth | 0.11 | Whole atmosphere · dimensionless | |
| Desert dust | 1 µg/m³ | Modelled surface dust | |
| UV index | 0 | Low |
“Next 24 h vs WHO” compares the forecast with the World Health Organization’s 2021 guideline levels: 24-hour means of 15 µg/m³ for PM2.5, 45 for PM10, 25 for NO2, 40 for SO2 and 4 mg/m³ for CO, and 100 µg/m³ over 8 hours for ozone. Above 1× is above the guideline. Levels follow the US AQI, which is far less strict than the WHO, so air rated Good can still be above a guideline.
Next 48 hours
Hourly US AQI. Highest 157 around Sun 20:00, lowest 32 around Sat 12:00.
5-day air quality forecast for Ulaanbaatar
Daily range of the hourly US AQI, from lowest to highest, on a scale of 0 to 200.
| Day | US AQI | At worst | UV max | |
|---|---|---|---|---|
| Sat 14 Nov | 32–145 | Sensitive | ||
| Sun 15 Nov | 61–157 | Unhealthy | ||
| Mon 16 Nov | 34–153 | Unhealthy | ||
| Tue 17 Nov | 30–97 | Moderate |
Common questions about the air in Ulaanbaatar
Is the air in Ulaanbaatar safe today?
For most people, yes. Right now the US AQI in Ulaanbaatar is 65, which counts as moderate. Acceptable. Unusually sensitive people should ease off long, intense outdoor effort. It is expected to reach 153 (unhealthy) around Sun 00:00.
When is the best time to be outside in Ulaanbaatar?
Sat 11:00–14:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 33. The worst hour is around Sun 00:00, at 153.
What is the main pollutant in Ulaanbaatar?
Fine particles (PM2.5). It drives the index right now, at 17 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.
How does Ulaanbaatar's air compare with the WHO guideline?
1.3 times the guideline. Over the next 24 hours PM2.5 averages about 20 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. The other pollutants stay within their guideline levels.
How many cigarettes is a day of Ulaanbaatar's air?
About 0.9 cigarettes. Over the next 24 hours PM2.5 averages about 20 µg/m³. By Berkeley Earth's rule of thumb, 22 µg/m³ breathed for a day is roughly one cigarette.
Will air quality in Ulaanbaatar improve this week?
Tuesday looks cleanest. Its AQI peaks at 97, against 157 on Sunday, the worst day in the forecast.
Air quality near Ulaanbaatar
US AQI right now. Cleanest nearby: Shanghai (152); worst: Beijing (283). The tick on each bar is Ulaanbaatar, at 65.
- Beijing 1,168 km SE 283 Very unhealthy
- Xi'an 1,516 km S 180 Unhealthy
- Chengdu 1,940 km S 198 Unhealthy
- Seoul 1,992 km SE 158 Unhealthy
- Wuhan 2,023 km S 168 Unhealthy
- Shanghai 2,225 km SE 152 Unhealthy
About this forecast
Forecast from CAMS global via Open-Meteo: the Copernicus Atmosphere Monitoring Service (CAMS) model at about 40 km resolution (about 10 km inside Europe). Global runs update every 12 hours and European runs every 24 hours. Models smooth out street-level peaks, so busy roads and industrial sites can be worse than shown. Nearby station measurements are independent observations, not adjustments to the forecast. The point forecast uses Open-Meteo’s CAMS products, including a separate carbon monoxide product; it can differ from the globe’s global grid. The AQI rates each hour on the US EPA scale, the same way the map colors it; official daily figures average over 24 hours (8 for ozone), so they can read lower after a short peak. Readings for 47.89°N, 106.91°E, valid 2026-11-13 17:00 UTC.