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Ulaanbaatar air quality

Mongolia · Live AQI and hourly forecast for the next 5 days · updated Sun 08:00 local time

47

Good

US AQI, mostly PM2.5

Great air. A perfect time to be outside.

Next 24 hours
42–56US AQI, highest around Mon 02:00
Best time outside
Sun 10:00–13:00US AQI about 43
PM2.5 vs WHO guideline
0.8×12 µg/m³ over 24 h, guideline 15
Cigarette equivalent
≈ 0.5 a dayBerkeley Earth rule of thumb
European AQI
Fairlevel 2 of 6

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The live globe, centred on Ulaanbaatar. Switch pollutants, drag through the next 5 days or press play. Full map →

Pollutants in Ulaanbaatar right now

PollutantNowNext 24 h vs WHOUS AQI band
Fine particles (PM2.5) 6.0 µg/m³ 0.8× Good
Coarse particles (PM10) 6.0 µg/m³ 0.3× Good
Nitrogen dioxide (NO2) 7.1 µg/m³ 0.4× Good
Ozone (O3) 50 µg/m³ 0.8× Good
Sulphur dioxide (SO2) 15 µg/m³ 0.4× Good
Carbon monoxide (CO) 982 µg/m³ 0.1× Good
Desert dust0 µg/m³
Smoke and haze (aerosol optical depth)0.06
UV index0.3

“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.

Next 48 hours

Hourly US AQI. Highest 56 around Mon 02:00, lowest 27 around Tue 07:00.

Good 0–50Moderate 51–100Sensitive 101–150Unhealthy 151–200Very unhealthy 201–300Hazardous 301+

5-day air quality forecast for Ulaanbaatar

Daily range of the hourly US AQI, from lowest to highest, on a scale of 0 to 150.

DayUS AQIAt worstWorst hourPM2.5 avgUV max
Sun 27 Sept 42–66 Moderate 0:00 11 4.3
Mon 28 Sept 46–56 Moderate 2:00 7.5 3.3
Tue 29 Sept 26–42 Good 0:00 3.9 3.5
Wed 30 Sept 22–32 Good 18:00 5.6 3.9
Thu 1 Oct 31–80 Moderate 21:00 25 3.6

Common questions about the air in Ulaanbaatar

  1. Is the air in Ulaanbaatar safe today?

    Yes. Right now the US AQI in Ulaanbaatar is 47, which counts as good. Great air. A perfect time to be outside. It is expected to reach 56 (moderate) around Mon 02:00.

  2. When is the best time to be outside in Ulaanbaatar?

    Sun 10:00–13:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 43. The worst hour is around Mon 02:00, at 56.

  3. What is the main pollutant in Ulaanbaatar?

    Fine particles (PM2.5). It drives the index right now, at 6.0 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.

  4. How does Ulaanbaatar's air compare with the WHO guideline?

    Within the guideline. Over the next 24 hours PM2.5 averages about 12 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. The other pollutants stay within their guideline levels.

  5. How many cigarettes is a day of Ulaanbaatar's air?

    About 0.5 cigarettes. Over the next 24 hours PM2.5 averages about 12 µg/m³. By Berkeley Earth's rule of thumb, 22 µg/m³ breathed for a day is roughly one cigarette.

  6. Will air quality in Ulaanbaatar improve this week?

    Wednesday looks cleanest. Its AQI peaks at 32, against 80 on Thursday, the worst day in the forecast.

Air quality near Ulaanbaatar

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About this forecast

Forecast from CAMS global via Open-Meteo: the Copernicus Atmosphere Monitoring Service (CAMS) model at about 40 km resolution (10 km inside Europe), refreshed twice a day. Models smooth out street-level peaks, so busy roads and industrial sites can be worse than shown; ground stations, where there are any nearby, show what monitors actually measure. The US AQI follows the US EPA scale and the European AQI the EEA bands. Readings for 47.89°N, 106.91°E, updated 2026-09-27 00:00 UTC.