Fine particles
38.6µg/m³Moderate · 1 hourCAMS model • Open-Meteo
TehranAir quality, PM2.5 and PM10
Check PM2.5 and PM10 particle levels alongside ozone, nitrogen dioxide and other gases. Compare the latest available concentrations with recent days and explore changes in air pollution through the available historical records.
Tehran - latest available concentrations (October 23, 2026, 04:30 local time): PM2.5: 38.6 µg/m³, PM10: 41.2 µg/m³, O₃: 0 µg/m³, NO₂: 70.4 µg/m³, SO₂: 26.3 µg/m³, CO: 3,187 µg/m³. These are hourly CAMS model values for a point representing the city.
Air quality questions →
1 weather warning in effect for Iran
Tehran · Air pollutant concentrations
Data time: October 23, 2026 · 04:30 · local timeParticulate matter
41.2µg/m³Fair · 1 hourOzone
0µg/m³Good · 1 hourNitrogen dioxide
70.4µg/m³Poor · 1 hourSulphur dioxide
26.3µg/m³Fair · 1 hourCarbon monoxide
3,187µg/m³PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
DAILY DATA · Tehran
Tehran - air pollution over recent days (2026-08-31 - 2026-10-22)
Concentrations of all available pollutants for this city.
PM2.5Lowest 19.3 2026-08-31Highest 47.38 2026-10-162026-08-31 - 2026-10-22
PM10Lowest 38.11 2026-10-20Highest 65.15 2026-09-052026-08-31 - 2026-10-22
O₃Lowest 34.5 2026-10-22Highest 86.75 2026-08-312026-08-31 - 2026-10-22
NO₂Lowest 27.08 2026-08-31Highest 84.48 2026-10-182026-08-31 - 2026-10-22
SO₂Lowest 9.75 2026-08-31Highest 34.49 2026-10-162026-08-31 - 2026-10-22
COLowest 694.38 2026-08-31Highest 3,312.29 2026-10-172026-08-31 - 2026-10-22
Scroll the chart or table sideways to see the full period.
| Pollutant | 2026-10-22 | 2026-10-21 | 2026-10-20 | 2026-10-19 | 2026-10-18 | 2026-10-17 | 2026-10-16 | 2026-09-07 | 2026-09-06 | 2026-09-05 | 2026-09-04 | 2026-09-03 | 2026-09-02 | 2026-09-01 | 2026-08-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 36.55 | 36.94 | 29.55 | 32.31 | 37.93 | 40.76 | 47.38 | 34.21 | 28.07 | 36.28 | 31.11 | 25.42 | 28.07 | 27.46 | 19.3 |
| PM10 | 43.56 | 50.73 | 38.11 | 40.28 | 40.37 | 43.75 | 49.99 | 64.79 | 49.03 | 65.15 | 55 | 39.28 | 47.65 | 54.26 | 43.11 |
| O₃ | 34.5 | 37.96 | 52.25 | 49.17 | 65.96 | 59.83 | 52.54 | 67 | 60.13 | 57.88 | 57.13 | 63.58 | 52.5 | 75.83 | 86.75 |
| NO₂ | 63.49 | 64.35 | 66.76 | 75.77 | 84.48 | 76.87 | 84.21 | 56 | 48.34 | 50.65 | 50.13 | 47.8 | 43.12 | 30.7 | 27.08 |
| SO₂ | 29.28 | 24.46 | 21.12 | 30.29 | 30.72 | 28.01 | 34.49 | 18.56 | 19.26 | 20.03 | 23.54 | 18.81 | 15.98 | 11.88 | 9.75 |
| CO | 3,005.33 | 3,198.54 | 2,232.71 | 2,217.88 | 2,051.92 | 3,312.29 | 3,309.5 | 1,304.96 | 1,291.13 | 1,792.71 | 1,205.46 | 1,440.58 | 1,910.58 | 2,085.42 | 694.38 |
A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.
Environment and quality of life ratings · Tehran
Archived ratings of the local environment: green spaces, cleanliness, noise and water quality. Opinion indicators are separate from pollutant concentration measurements.
| Indicator | Tehran | Bahrain | Kuwait | Qatar | Iraq | United Arab Emirates |
|---|---|---|---|---|---|---|
| Green and Parks in the City | 48% | 34% | 45% | 52% | 40% | 58% |
| Pleasure of spending time in the city | 40% | 36% | 46% | 51% | 43% | 62% |
| Air Pollution | 65% | 74% | 69% | 63% | 66% | 49% |
| Garbage Disposal | 34% | 49% | 43% | 67% | 32% | 68% |
| Availability and quality of drinking water | 48% | 66% | 61% | 63% | 45% | 67% |
| Cleanliness and tidiness | 37% | 53% | 42% | 67% | 39% | 74% |
| Noise and Light pollution | 59% | 55% | 50% | 56% | 52% | 51% |
| Water Pollution | 69% | 51% | 52% | 45% | 63% | 39% |
Air quality in nearby cities
All cities →Iran↗
Karaj
PM2.520
PM1041.9
µg/m³
PM2.5 · ModerateNO₂ 51O₃ 30
October 23, 202604:30
Iran↗
Qom
PM2.510.3
PM1017.8
µg/m³
PM2.5 · FairNO₂ 37.9O₃ 16
October 23, 202604:30
Iran↗
Arak
PM2.522.1
PM1040.7
µg/m³
PM2.5 · ModerateNO₂ 49.2O₃ 12
October 23, 202604:30
Iran↗
Rasht
PM2.523.7
PM1040.2
µg/m³
PM2.5 · ModerateNO₂ 35.1O₃ 27
October 23, 202604:30
Iran↗
Hamadan
PM2.514.3
PM1031.3
µg/m³
PM2.5 · FairNO₂ 44.5O₃ 30
October 23, 202604:30
Iran↗
Eşfahān
PM2.515.2
PM1021.2
µg/m³
PM2.5 · ModerateNO₂ 49.8O₃ 0
October 23, 202604:30
Iran↗
Ardabīl
PM2.511.8
PM1020.8
µg/m³
PM2.5 · FairNO₂ 10.4O₃ 46
October 23, 202604:30
Iran↗
Kahrīz
PM2.521.1
PM1043.9
µg/m³
PM2.5 · ModerateNO₂ 35.7O₃ 32
October 23, 202604:30
Iran · air quality in other cities
WEATHER & SURROUNDINGS
Tehran · weather forecast
Daily maximum and minimum temperatures. Forecast point: 35.6944, 51.4215.
Scroll the forecast to see the following days.
Tehran · October 20, 2026: minimum temperature 19.7°C, maximum 29.4°C. Wind: 10 km/h. Humidity: 23%.
Full forecast: temperature, rainfall, wind and humidity
| Date | Day °C | Min °C | Max °C | Night °C | Rain mm | Wind m/s | Humidity % | Clouds % |
|---|---|---|---|---|---|---|---|---|
| 2026-10-20 | 26.7 | 19.7 | 29.4 | 25.1 | 0.5 | 2.8 | 23 | 17 |
| 2026-10-21 | 25.7 | 18.7 | 27.1 | 19.7 | 0.3 | 2.8 | 26 | 62 |
| 2026-10-22 | 23.9 | 17 | 25 | 18.6 | 3 | 2.5 | 28 | 64 |
| 2026-10-23 | 24.2 | 13.6 | 25.6 | 14 | 0.9 | 3.3 | 27 | 1 |
| 2026-10-24 | 16.6 | 10.8 | 18.1 | 11.9 | 2.3 | 3.4 | 37 | 19 |
| 2026-10-25 | 15.6 | 9.3 | 17.1 | 12.7 | 1.5 | 2.4 | 37 | 10 |
| 2026-10-26 | 12.4 | 9.2 | 14.6 | 9.6 | 7.7 | 2.2 | 55 | 5 |
| 2026-10-27 | 13.7 | 7 | 16 | 13.8 | 2.2 | 2.1 | 39 | 41 |
| 2026-10-28 | 19.2 | 14.8 | 21.1 | 19.7 | 0.8 | 2.3 | 24 | 26 |
| 2026-10-29 | 19.3 | 17.7 | 21.4 | 20.3 | 1.6 | 2.3 | 26 | 57 |
| 2026-10-30 | 19.7 | 18.2 | 22.4 | 20.9 | 0.6 | 2.3 | 26 | 32 |
| 2026-10-31 | 20.5 | 19.2 | 22.5 | 20.4 | 0.8 | 2.2 | 25 | 98 |
| 2026-11-01 | 20.7 | 18.7 | 23.1 | 21.5 | 0.5 | 2.3 | 26 | 61 |
| 2026-11-02 | 20.1 | 19.3 | 20.6 | 19.8 | 0.6 | 3.6 | 32 | 63 |
| 2026-11-03 | 19.6 | 18.2 | 22.5 | 18.6 | 4.3 | 5.8 | 35 | 83 |
| 2026-11-04 | 16.8 | 15.5 | 19.9 | 18 | 4 | 3.5 | 57 | 98 |
| 2026-11-05 | 14.4 | 13.3 | 17.4 | 15.9 | 9.7 | 4.1 | 69 | 97 |
| 2026-11-06 | 15.9 | 15.8 | 18.5 | 17.4 | 0.5 | 2.1 | 50 | 98 |
UV index by day · Tehran
City data.
Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.
0-2 low3-5 moderate6-7 high8-10 very high11+ extreme
Scroll the forecast to see the following days.
Tehran · October 22, 2026: UV index: 4.9 .
| Indicator | 2026-10-22 | 2026-10-23 | 2026-10-24 | 2026-10-25 | 2026-10-26 | 2026-10-27 | 2026-10-28 | 2026-10-29 | 2026-10-30 | 2026-10-31 | 2026-11-01 | 2026-11-02 | 2026-11-03 | 2026-11-04 | 2026-11-05 | 2026-11-06 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index | 4.9 | 5.2 | 5.2 | 4.9 | 5 | 4.7 | 4.2 | 4.5 | 4.3 | 3.8 | 2 | 4.5 | 4.1 | 3.4 | 4.3 | — |
AIR QUALITY QUESTIONS
Tehran · air pollution - questions and answers
What do the latest air quality data show for Tehran?
Tehran - latest available concentrations (October 23, 2026, 04:30 local time): PM2.5: 38.6 µg/m³, PM10: 41.2 µg/m³, O₃: 0 µg/m³, NO₂: 70.4 µg/m³, SO₂: 26.3 µg/m³, CO: 3,187 µg/m³. These are hourly CAMS model values for a point representing the city.
When was PM2.5 highest in Tehran over the past week?
The highest available daily mean PM2.5 was 47.4 µg/m³ (October 16, 2026). This comparison covers 7 days with data in the seven days before October 23, 2026. The day of the latest reading is excluded because it may be incomplete.
Is the PM2.5 concentration for Tehran an AQI score?
No. PM2.5 and PM10 are concentrations in µg/m³. AQI is a separate index calculated using a defined scale. When comparing air quality, also check other pollutants, the date and the averaging period.
What UV index does the available forecast show for Tehran?
For October 22, 2026, the forecast UV index is 4.9. The UV section also shows the following available days.
What wind speed is forecast for Tehran?
For October 20, 2026, forecast wind speed is 10 km/h. The weather table includes wind, temperature and other available parameters for subsequent days.
PM2.5 · PM10 · NO₂ · O₃
Understanding air quality and pollution data
What do PM2.5 and PM10 mean?
PM2.5 and PM10 are fractions of airborne particulate matter. PM2.5 covers fine particles up to 2.5 micrometres in diameter, while PM10 covers particles up to 10 micrometres. Concentrations in µg/m³ tell you how many micrograms of particles are present in a cubic metre of air. Compare values over the same time period.
Where does the air pollution data come from?
The latest concentrations come from the CAMS atmospheric model via Open-Meteo for each city’s coordinates. Values describe a model area, so conditions on individual streets may differ. Historical monitoring station data is shown separately where available.
How does PM2.5 concentration differ from AQI?
PM2.5 is the concentration of one particle fraction, expressed in µg/m³. AQI is an index calculated using a particular scale and thresholds. The pollutant cards show concentrations. Our city ranking compares PM2.5; PM10, ozone, nitrogen dioxide and other available gases add to the picture of air quality.
Which dates do the values and charts cover?
Each current value has a data date and time. Current concentration cards show the latest available hour, daily charts summarise individual days, and monthly records let you compare longer periods. These values represent different time intervals.
How can I check pollution in my city?
Search for your city and open its air quality page. Start with PM2.5 and PM10, then check the other available pollutants and the data timestamp. Charts and tables help you compare concentrations over time. Weather and historical climate information complement the pollution data.