Fine particles
11.9µg/m³Fair · 1 hourCAMS model • Open-Meteo
KathmanduAir 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.
Kathmandu - latest available concentrations (September 26, 2026, 06:45 local time): PM2.5: 11.9 µg/m³, PM10: 12.3 µg/m³, O₃: 68 µg/m³, NO₂: 6.1 µg/m³, SO₂: 2.1 µg/m³, CO: 454 µg/m³. These are hourly CAMS model values for a point representing the city.
Air quality questions →Kathmandu · Air pollutant concentrations
Data time: September 26, 2026 · 06:45 · local timeParticulate matter
12.3µg/m³Good · 1 hourOzone
68µg/m³Fair · 1 hourNitrogen dioxide
6.1µg/m³Good · 1 hourSulphur dioxide
2.1µg/m³Good · 1 hourCarbon monoxide
454µg/m³PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
DAILY DATA · Kathmandu
Kathmandu - air pollution over recent days (2026-08-31 - 2026-09-25)
Concentrations of all available pollutants for this city.
PM2.5Lowest 14.1 2026-09-01Highest 31.38 2026-09-202026-08-31 - 2026-09-25
PM10Lowest 14.2 2026-09-25Highest 31.63 2026-09-202026-08-31 - 2026-09-25
O₃Lowest 52.42 2026-09-25Highest 103.5 2026-09-192026-08-31 - 2026-09-25
NO₂Lowest 9.06 2026-09-06Highest 18.92 2026-09-212026-08-31 - 2026-09-25
SO₂Lowest 2.85 2026-09-25Highest 6.55 2026-09-212026-08-31 - 2026-09-25
COLowest 584.13 2026-09-06Highest 1,160.33 2026-09-192026-08-31 - 2026-09-25
Scroll the chart or table sideways to see the full period.
| Pollutant | 2026-09-25 | 2026-09-24 | 2026-09-23 | 2026-09-22 | 2026-09-21 | 2026-09-20 | 2026-09-19 | 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 | 14.11 | 18.35 | 15.26 | 23.33 | 23.66 | 31.38 | 24.78 | 21.98 | 20.6 | 18.23 | 24.49 | 17.03 | 16.27 | 14.1 | 21.2 |
| PM10 | 14.2 | 18.4 | 15.32 | 23.74 | 23.95 | 31.63 | 25.4 | 22.55 | 21.18 | 18.6 | 25.44 | 18.22 | 16.8 | 14.39 | 21.63 |
| O₃ | 52.42 | 57.58 | 80.96 | 77.54 | 85.04 | 91.88 | 103.5 | 92.46 | 89.25 | 81.25 | 69 | 69.54 | 67.08 | 75 | 81.83 |
| NO₂ | 15.87 | 17.79 | 10.46 | 18 | 18.92 | 15.48 | 12.64 | 11.48 | 9.06 | 12.63 | 17.61 | 13.73 | 11.85 | 11.89 | 14.83 |
| SO₂ | 2.85 | 2.88 | 3.43 | 6.33 | 6.55 | 6.49 | 5.18 | 5.03 | 3.71 | 4.25 | 5.53 | 4.48 | 4.36 | 4.58 | 5.79 |
| CO | 868.88 | 1,091.75 | 905.67 | 1,091.13 | 1,060.17 | 891.17 | 1,160.33 | 694.75 | 584.13 | 809.42 | 925.04 | 840.88 | 715.96 | 744.83 | 688.54 |
A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.
AIR QUALITY ARCHIVE · Kathmandu
Kathmandu - air pollution history (2017-04 - 2020-05)
Compare monthly particle and gas concentrations in the available archive.
PM2.5Lowest 13.7 2019-08Highest 99.95 2018-022017-04 - 2020-05
O₃ (ppm)Lowest 0.01256 2017-07Highest 0.0471 2019-052017-04 - 2020-05
Scroll the chart or table sideways to see the full period.
| Pollutant | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 | 2017-12 | 2017-11 | 2017-10 | 2017-09 | 2017-08 | 2017-07 | 2017-06 | 2017-05 | 2017-04 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 µg/m³ | 21.5 | 47.6 | 42.35 | 82.1 | 81.9 | 72 | 56.4 | 30.7 | 14.9 | 13.7 | 16.35 | 31.6 | 62.7 | 57.35 | 73.2 | 67.85 | 99.25 | 96.9 | 68.75 | 36.3 | 20.15 | 14.4 | 14.95 | 29.55 | 42.2 | 63.4 | 90.55 | 99.95 | 89.4 | 82.6 | 57.1 | 36.05 | 25.85 | 17.5 | 19.1 | 35.6 | 49.45 | 74.3 |
| O₃ (ppm) | 0.02885 | 0.0398 | 0.02735 | 0.01515 | 0.012835 | 0.01585 | 0.01845 | 0.02085 | 0.01465 | 0.0187 | 0.0221 | 0.0373 | 0.0471 | 0.03495 | 0.03275 | 0.01595 | 0.0138 | 0.0141 | 0.0158 | 0.02805 | 0.0191 | 0.01775 | 0.0185 | 0.034 | 0.03595 | 0.03665 | 0.0351 | 0.0218 | 0.0193 | 0.01885 | 0.02215 | 0.016705 | 0.015145 | 0.013185 | 0.01256 | 0.0403 | 0.0437 | 0.04095 |
A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.
Historical data by station 2
AIR QUALITY ARCHIVE · US Diplomatic Post: Embassy Kathmandu
US Diplomatic Post: Embassy Kathmandu
Station code: US Diplomatic Post: Embassy Kathmandu
Monthly monitoring station data.
PM2.5Lowest 12.6 2019-09Highest 99.9 2018-022017-04 - 2020-05
O₃ (ppm)Lowest 0.00242 2017-07Highest 0.0524 2019-052017-04 - 2020-05
Scroll the chart or table sideways to see the full period.
| Pollutant | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 | 2017-12 | 2017-11 | 2017-10 | 2017-09 | 2017-08 | 2017-07 | 2017-06 | 2017-05 | 2017-04 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 µg/m³ | 19.6 | 48.6 | 41.1 | 80.8 | 71.5 | 64.5 | 54 | 29.8 | 12.6 | 13.1 | 14.7 | 29.5 | 58.9 | 54.5 | 65.7 | 57.4 | 88.5 | 88.8 | 62 | 33.6 | 18 | 14 | 14.9 | 27.3 | 40.9 | 58.1 | 89.2 | 99.9 | 83.4 | 76 | 50.4 | 34.1 | 25.3 | 13.4 | 18.2 | 36.6 | 46 | 66 |
| O₃ (ppm) | 0.0353 | 0.0454 | 0.0314 | 0.0139 | 0.0164 | 0.0194 | 0.0219 | 0.0248 | 0.0183 | 0.0223 | 0.0266 | 0.04 | 0.0524 | 0.0413 | 0.0375 | 0.0161 | 0.0144 | 0.0149 | 0.017 | 0.033 | 0.0228 | 0.0212 | 0.0225 | 0.0392 | 0.0407 | 0.0405 | 0.0384 | 0.0225 | 0.0173 | 0.0166 | 0.0193 | 0.00281 | 0.00309 | 0.00367 | 0.00242 | 0.0379 | 0.047 | 0.0448 |
A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.
How should I interpret the data and averaging period? →
OpenAQ ↗StateAir_Kathmandu
AIR QUALITY ARCHIVE · US Diplomatic Post: Phora Durbar Kathmandu
US Diplomatic Post: Phora Durbar Kathmandu
Station code: US Diplomatic Post: Phora Durbar Kathmandu
Monthly monitoring station data.
PM2.5Lowest 14.3 2019-08Highest 110 2019-012017-04 - 2020-05
O₃ (ppm)Lowest 0.00927 2020-01Highest 0.0427 2017-062017-04 - 2020-05
Scroll the chart or table sideways to see the full period.
| Pollutant | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 | 2017-12 | 2017-11 | 2017-10 | 2017-09 | 2017-08 | 2017-07 | 2017-06 | 2017-05 | 2017-04 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 µg/m³ | 23.4 | 46.6 | 43.6 | 83.4 | 92.3 | 79.5 | 58.8 | 31.6 | 17.2 | 14.3 | 18 | 33.7 | 66.5 | 60.2 | 80.7 | 78.3 | 110 | 105 | 75.5 | 39 | 22.3 | 14.8 | 15 | 31.8 | 43.5 | 68.7 | 91.9 | 100 | 95.4 | 89.2 | 63.8 | 38 | 26.4 | 21.6 | 20 | 34.6 | 52.9 | 82.6 |
| O₃ (ppm) | 0.0224 | 0.0342 | 0.0233 | 0.0164 | 0.00927 | 0.0123 | 0.015 | 0.0169 | 0.011 | 0.0151 | 0.0176 | 0.0346 | 0.0418 | 0.0286 | 0.028 | 0.0158 | 0.0132 | 0.0133 | 0.0146 | 0.0231 | 0.0154 | 0.0143 | 0.0145 | 0.0288 | 0.0312 | 0.0328 | 0.0318 | 0.0211 | 0.0213 | 0.0211 | 0.025 | 0.0306 | 0.0272 | 0.0227 | 0.0227 | 0.0427 | 0.0404 | 0.0371 |
A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.
How should I interpret the data and averaging period? →
OpenAQ ↗StateAir_PhoraDurbar
Environment and quality of life ratings · Kathmandu
Archived ratings of the local environment: green spaces, cleanliness, noise and water quality. Opinion indicators are separate from pollutant concentration measurements.
| Indicator | Kathmandu | Bhutan | Bangladesh | India | Myanmar | Pakistan |
|---|---|---|---|---|---|---|
| Green and Parks in the City | 22% | 82% | 33% | 48% | 33% | 49% |
| particulate matter PM2.5 (µg/m³) | 48.5 | — | — | — | — | — |
| Pleasure of spending time in the city | 20% | 61% | 26% | 40% | 24% | 43% |
| particulate matter PM10 (µg/m³) | 87.1 | — | — | — | — | — |
| Air Pollution | 89% | 45% | 78% | 65% | 83% | 64% |
| Garbage Disposal | 17% | 47% | 22% | 34% | 12% | 34% |
| Availability and quality of drinking water | 28% | 64% | 44% | 48% | 34% | 44% |
| Cleanliness and tidiness | 17% | 57% | 23% | 37% | 18% | 40% |
| Noise and Light pollution | 57% | 55% | 63% | 59% | 52% | 59% |
| Water Pollution | 81% | 56% | 74% | 69% | 74% | 70% |
Air quality in nearby cities
All cities →Nepal↗
Bharatpur
PM2.511.8
PM1012.1
µg/m³
PM2.5 · FairNO₂ 5.2O₃ 65
September 26, 202606:45
Nepal↗
Bīrganj
PM2.59.4
PM109.7
µg/m³
PM2.5 · FairNO₂ 2O₃ 71
September 26, 202606:45
Nepal↗
Bagaha
PM2.58.3
PM108.5
µg/m³
PM2.5 · FairNO₂ 2.8O₃ 69
September 26, 202606:30
Nepal↗
Pokhara Lekhnath
PM2.55.6
PM105.6
µg/m³
PM2.5 · FairNO₂ 7.5O₃ 72
September 26, 202606:45
Nepal↗
Dharan
PM2.516.4
PM1016.8
µg/m³
PM2.5 · ModerateNO₂ 5.7O₃ 54
September 26, 202606:45
Nepal↗
Biratnagar
PM2.515.5
PM1015.9
µg/m³
PM2.5 · ModerateNO₂ 4.8O₃ 66
September 26, 202606:45
Nepal↗
Bahraich
PM2.59.3
PM109.4
µg/m³
PM2.5 · FairNO₂ 3.5O₃ 68
September 26, 202606:30
Nepal↗
Lakhīmpur
PM2.55.8
PM105.8
µg/m³
PM2.5 · FairNO₂ 6.6O₃ 71
September 26, 202606:30
Nepal · air quality in other cities
WEATHER & SURROUNDINGS
Kathmandu · weather forecast
Daily maximum and minimum temperatures. Forecast point: 27.7017, 85.3206.
Scroll the forecast to see the following days.
Kathmandu · September 23, 2026: minimum temperature 18.5°C, maximum 24.4°C. Wind: 7.5 km/h. Humidity: 80%.
Full forecast: temperature, rainfall, wind and humidity
| Date | Day °C | Min °C | Max °C | Night °C | Rain mm | Wind m/s | Humidity % | Clouds % |
|---|---|---|---|---|---|---|---|---|
| 2026-09-23 | 23.7 | 18.5 | 24.4 | 18.5 | 26 | 2.1 | 80 | 9 |
| 2026-09-24 | 19 | 16.7 | 20.2 | 17.1 | 30.9 | 2 | 98 | 100 |
| 2026-09-25 | 17 | 16.8 | 17.3 | 17.1 | 83.9 | 2.2 | 96 | 100 |
| 2026-09-26 | 17.7 | 16.7 | 22 | 18.3 | 11.2 | 2.6 | 97 | 100 |
| 2026-09-27 | 25.1 | 16.9 | 25.9 | 18.4 | 6.5 | 1.7 | 66 | 5 |
| 2026-09-28 | 24.7 | 17.7 | 24.7 | 17.8 | 2.2 | 1.8 | 73 | 81 |
| 2026-09-29 | 25.5 | 16.9 | 25.5 | 18.1 | 2.9 | 2 | 71 | 8 |
| 2026-09-30 | 24.9 | 17.2 | 24.9 | 17.7 | 1 | 2 | 71 | 24 |
| 2026-10-01 | 24.7 | 17.4 | 24.7 | 17.9 | 1.2 | 2.1 | 70 | 29 |
| 2026-10-02 | 24.3 | 17.6 | 24.3 | 17.6 | 4.3 | 1.9 | 72 | 29 |
| 2026-10-03 | 24.1 | 17 | 24.1 | 17.4 | 3.9 | 2.1 | 71 | 26 |
| 2026-10-04 | 23.8 | 17.1 | 23.8 | 17.2 | 6 | 1.8 | 71 | 63 |
| 2026-10-05 | 22.6 | 16.4 | 22.6 | 17.1 | 10 | 1.8 | 76 | 14 |
| 2026-10-06 | 22.8 | 16.2 | 22.8 | 16.5 | 10.8 | 1.7 | 73 | 17 |
| 2026-10-07 | 23.2 | 15.7 | 23.2 | 16.5 | 6.9 | 1.7 | 70 | 10 |
| 2026-10-08 | 23.7 | 15.8 | 23.7 | 16.6 | 5.4 | 1.8 | 68 | 7 |
| 2026-10-09 | 24.3 | 15.9 | 24.3 | 16.9 | 4.6 | 1.7 | 64 | 3 |
| 2026-10-10 | 24 | 16 | 24 | 17.1 | 4.8 | 1.9 | 67 | 19 |
UV index by day · Kathmandu
City data.
You can safely stay in the sun. Sunscreen only matters on very long exposure.
0-2 low3-5 moderate6-7 high8-10 very high11+ extreme
Scroll the forecast to see the following days.
Kathmandu · September 25, 2026: UV index: 0.5 .
| Indicator | 2026-09-25 | 2026-09-26 | 2026-09-27 | 2026-09-28 | 2026-09-29 | 2026-09-30 | 2026-10-01 | 2026-10-02 | 2026-10-03 | 2026-10-04 | 2026-10-05 | 2026-10-06 | 2026-10-07 | 2026-10-08 | 2026-10-09 | 2026-10-10 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index | 0.5 | 3.9 | 7.7 | 6.7 | 7.7 | 6.3 | 6.4 | 6.6 | 7.5 | 6.5 | 7.5 | 7.5 | 7.4 | 7.3 | 7.3 | — |
AIR QUALITY QUESTIONS
Kathmandu · air pollution - questions and answers
What do the latest air quality data show for Kathmandu?
Kathmandu - latest available concentrations (September 26, 2026, 06:45 local time): PM2.5: 11.9 µg/m³, PM10: 12.3 µg/m³, O₃: 68 µg/m³, NO₂: 6.1 µg/m³, SO₂: 2.1 µg/m³, CO: 454 µg/m³. These are hourly CAMS model values for a point representing the city.
When was PM2.5 highest in Kathmandu over the past week?
The highest available daily mean PM2.5 was 31.4 µg/m³ (September 20, 2026). This comparison covers 7 days with data in the seven days before September 26, 2026. The day of the latest reading is excluded because it may be incomplete.
What period does the pollution history for Kathmandu cover?
Available monthly means cover 2017-04 - 2020-05. The tables include PM2.5, O₃ (ppm). Missing values are marked with a dash, not treated as zero. Monthly archives and current model data may come from different sources.
Is the PM2.5 concentration for Kathmandu 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 Kathmandu?
For September 25, 2026, the forecast UV index is 0.5. The UV section also shows the following available days.
What wind speed is forecast for Kathmandu?
For September 23, 2026, forecast wind speed is 7.5 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.