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Xi'an air quality

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

167

Unhealthy

US AQI, mostly PM2.5

Everyone should cut back on outdoor exercise. Sensitive groups should stay indoors.

Next 24 hours
167–182US AQI, highest around Sun 20:00
Best time outside
Sun 08:00–11:00US AQI about 168
PM2.5 vs WHO guideline
6.6×100 µg/m³ over 24 h, guideline 15
Cigarette equivalent
≈ 4.5 a dayBerkeley Earth rule of thumb
European AQI
Poorlevel 4 of 6

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

Pollutants in Xi'an right now

PollutantNowNext 24 h vs WHOUS AQI band
Fine particles (PM2.5) 84 µg/m³ 6.6× Unhealthy
Coarse particles (PM10) 84 µg/m³ 2.2× Moderate
Nitrogen dioxide (NO2) 42 µg/m³ 3.0× Good
Ozone (O3) 9.0 µg/m³ 0.7× Good
Sulphur dioxide (SO2) 13 µg/m³ 0.5× Good
Carbon monoxide (CO) 1,367 µg/m³ 0.3× Good
Desert dust0 µg/m³
Smoke and haze (aerosol optical depth)0.98
UV index0.2

“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 183 around Mon 10:00, lowest 167 around Sun 08:00.

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

5-day air quality forecast for Xi'an

Daily range of the hourly US AQI, from lowest to highest, on a scale of 0 to 200.

DayUS AQIAt worstWorst hourPM2.5 avgUV max
Sun 27 Sept 165–182 Unhealthy 20:00 99 3.3
Mon 28 Sept 172–183 Unhealthy 10:00 87 1.0
Tue 29 Sept 160–173 Unhealthy 0:00 72 5.5
Wed 30 Sept 161–166 Unhealthy 18:00 72 4.5
Thu 1 Oct 153–162 Unhealthy 0:00 56 4.0

Common questions about the air in Xi'an

  1. Is the air in Xi'an safe today?

    No. Right now the US AQI in Xi'an is 167, which counts as unhealthy. Everyone should cut back on outdoor exercise. Sensitive groups should stay indoors.

  2. When is the best time to be outside in Xi'an?

    Sun 08:00–11:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 168. The worst hour is around Sun 20:00, at 182.

  3. What is the main pollutant in Xi'an?

    Fine particles (PM2.5). It drives the index right now, at 84 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.

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

    6.6 times the guideline. Over the next 24 hours PM2.5 averages about 100 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. PM10 and NO2 are also forecast above their guideline levels.

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

    About 4.5 cigarettes. Over the next 24 hours PM2.5 averages about 100 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 Xi'an improve this week?

    Thursday looks cleanest. Its AQI peaks at 162, against 183 on Monday, the worst day in the forecast.

Air quality near Xi'an

All 161 cities

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 34.34°N, 108.94°E, updated 2026-09-27 00:00 UTC.