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Tehran air quality

Iran · Live AQI and hourly forecast for the next 5 days · updated Sun 02:30 local time

97

Moderate

US AQI, mostly PM2.5

Acceptable. Unusually sensitive people should ease off long, intense outdoor effort.

Next 24 hours
93–106US AQI, highest around Sun 09:00
Best time outside
Sun 23:00–2:00US AQI about 95
PM2.5 vs WHO guideline
2.1×31 µg/m³ over 24 h, guideline 15
Cigarette equivalent
≈ 1.4 a dayBerkeley Earth rule of thumb
European AQI
Poorlevel 4 of 6

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

Pollutants in Tehran right now

PollutantNowNext 24 h vs WHOUS AQI band
Fine particles (PM2.5) 51 µg/m³ 2.1× Sensitive
Coarse particles (PM10) 60 µg/m³ 1.1× Moderate
Nitrogen dioxide (NO2) 75 µg/m³ 1.9× Good
Ozone (O3) 1.0 µg/m³ 1.2× Good
Sulphur dioxide (SO2) 22 µg/m³ 0.5× Good
Carbon monoxide (CO) 2,849 µg/m³ 0.3× Good
Desert dust22 µg/m³
Smoke and haze (aerosol optical depth)0.26
UV index0.0

“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 110 around Tue 01:00, lowest 90 around Mon 04:00.

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

5-day air quality forecast for Tehran

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 92–106 Sensitive 9:00 33 7.0
Mon 28 Sept 90–107 Sensitive 23:00 39 7.0
Tue 29 Sept 108–113 Sensitive 4:00 40 7.2
Wed 30 Sept 92–112 Sensitive 0:00 31 6.5
Thu 1 Oct 92–111 Sensitive 16:00 41 6.4

Common questions about the air in Tehran

  1. Is the air in Tehran safe today?

    For most people, yes. Right now the US AQI in Tehran is 97, which counts as moderate. Acceptable. Unusually sensitive people should ease off long, intense outdoor effort. It is expected to reach 106 (unhealthy for sensitive groups) around Sun 09:00.

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

    Sun 23:00–2:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 95. The worst hour is around Sun 09:00, at 106.

  3. What is the main pollutant in Tehran?

    Fine particles (PM2.5). It drives the index right now, at 51 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.

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

    2.1 times the guideline. Over the next 24 hours PM2.5 averages about 31 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. PM10, NO2 and O3 are also forecast above their guideline levels.

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

    About 1.4 cigarettes. Over the next 24 hours PM2.5 averages about 31 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 Tehran improve this week?

    Today looks cleanest. Its AQI peaks at 106, against 113 on Tuesday, the worst day in the forecast.

Air quality near Tehran

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 35.69°N, 51.39°E, updated 2026-09-26 23:00 UTC.