Fine particles
2.1µg/m³Good · 1 hourCAMS model • Open-Meteo
BangkokAir 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.
Bangkok - latest available concentrations (September 27, 2026, 08:00 local time): PM2.5: 2.1 µg/m³, PM10: 2.5 µg/m³, O₃: 41 µg/m³, NO₂: 6.9 µg/m³, SO₂: 2.5 µg/m³, CO: 467 µg/m³. These are hourly CAMS model values for a point representing the city.
Air quality questions →
1 weather warning in effect for Thailand
Bangkok · Air pollutant concentrations
Data time: September 27, 2026 · 08:00 · local timeParticulate matter
2.5µg/m³Good · 1 hourOzone
41µg/m³Good · 1 hourNitrogen dioxide
6.9µg/m³Good · 1 hourSulphur dioxide
2.5µg/m³Good · 1 hourCarbon monoxide
467µg/m³PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
DAILY DATA · Bangkok
Bangkok - air pollution over recent days (2026-08-31 - 2026-09-26)
Concentrations of all available pollutants for this city.
PM2.5Lowest 2.21 2026-09-26Highest 20.03 2026-09-242026-08-31 - 2026-09-26
PM10Lowest 2.27 2026-09-26Highest 20.91 2026-09-042026-08-31 - 2026-09-26
O₃Lowest 32.08 2026-09-02Highest 97.38 2026-09-232026-08-31 - 2026-09-26
NO₂Lowest 7.08 2026-09-26Highest 41.93 2026-09-242026-08-31 - 2026-09-26
SO₂Lowest 2.33 2026-09-26Highest 17.82 2026-09-242026-08-31 - 2026-09-26
COLowest 473.75 2026-09-26Highest 1,149.75 2026-09-022026-08-31 - 2026-09-26
Scroll the chart or table sideways to see the full period.
| Pollutant | 2026-09-26 | 2026-09-25 | 2026-09-24 | 2026-09-23 | 2026-09-22 | 2026-09-21 | 2026-09-20 | 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 | 2.21 | 6.61 | 20.03 | 19.65 | 18.96 | 17.57 | 8.75 | 5.75 | 7.16 | 15.13 | 16.73 | 13.63 | 12.92 | 9 | 6.3 |
| PM10 | 2.27 | 6.72 | 20.29 | 20.18 | 20.83 | 19.26 | 10.38 | 6.35 | 8.17 | 20.1 | 20.91 | 18.8 | 16.65 | 12.89 | 8.08 |
| O₃ | 42.33 | 45.17 | 54.04 | 97.38 | 57.75 | 49.25 | 66.33 | 40.71 | 51.04 | 44.79 | 38.96 | 45.29 | 32.08 | 36.63 | 36.58 |
| NO₂ | 7.08 | 14.01 | 41.93 | 33.94 | 29.26 | 28.96 | 12.4 | 12.28 | 11.1 | 20.99 | 29.53 | 23.18 | 25.01 | 18.13 | 15.59 |
| SO₂ | 2.33 | 4.56 | 17.82 | 17.06 | 13.64 | 14.4 | 5.78 | 4.96 | 4.99 | 7.14 | 10.28 | 7.44 | 7.9 | 5.94 | 5.5 |
| CO | 473.75 | 524.83 | 748.42 | 861.83 | 1,121.13 | 991.21 | 1,008.21 | 945.5 | 670.38 | 754.63 | 699.92 | 844.17 | 1,149.75 | 716.04 | 1,089.08 |
A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.
AIR QUALITY ARCHIVE · Bangkok
Bangkok - air pollution history (2015-10 - 2020-05)
Compare monthly particle and gas concentrations in the available archive.
PM10Lowest 24.7 2016-06Highest 248 2016-122015-10 - 2020-05
O₃ (ppm)Lowest 0.00557 2019-06Highest 0.0245 2017-012015-10 - 2020-05
NO₂ (ppm)Lowest 0.0112 2020-05Highest 0.0488 2019-012015-10 - 2020-05
SO₂ (ppm)Lowest 0.00105 2017-05Highest 0.00624 2019-082015-10 - 2020-05
CO (ppm)Lowest 0.444 2016-07Highest 1.66 2018-102015-10 - 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 | 2017-03 | 2017-02 | 2017-01 | 2016-12 | 2016-11 | 2016-10 | 2016-09 | 2016-08 | 2016-07 | 2016-06 | 2016-05 | 2016-04 | 2016-03 | 2016-02 | 2016-01 | 2015-12 | 2015-11 | 2015-10 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM10 µg/m³ | 32.4 | 40.65 | 49.1 | 76.8 | 70.05 | 63.45 | 58.8 | 51.3 | 52.6 | 38.2 | 49.6 | 51.15 | 60.4 | 38 | 49.4 | 51 | 88.2 | 75.3 | 72.1 | 52.7 | 47.7 | 43.7 | 50 | 39.3 | 38.5 | 46.7 | 54.1 | 72.3 | 60.5 | 50.1 | 49.8 | 51.75 | 46.5 | 40.4 | 34.15 | 37.85 | 37.9 | 43.1 | 52.3 | 64.3 | 61.2 | 248 | 55.8 | 29 | 26 | 61.45 | 27.8 | 24.7 | 27.9 | 43.6 | 57.5 | 68.6 | 49.5 | 64.1 | 46.3 | 53.1 |
| O₃ (ppm) | — | 0.00844 | 0.0132 | 0.0229 | 0.021 | 0.0202 | 0.0188 | 0.0151 | 0.0129 | 0.00744 | 0.00977 | 0.00557 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.011 | 0.0122 | 0.00829 | 0.0133 | 0.0131 | 0.0227 | 0.0245 | — | 0.0164 | — | — | 0.0141 | 0.013 | 0.0109 | 0.0204 | 0.011 | 0.0138 | 0.0203 | 0.0154 | 0.0161 | 0.0113 | 0.0119 |
| NO₂ (ppm) | 0.0112 | 0.01406 | 0.0187 | 0.0304 | 0.03255 | 0.03835 | 0.0389 | 0.0326 | 0.0259 | 0.01615 | 0.01875 | 0.017 | 0.0267 | 0.0212 | 0.0252 | 0.0252 | 0.0488 | 0.0395 | 0.0414 | 0.0403 | 0.0344 | 0.0233 | 0.0245 | 0.0247 | 0.0306 | 0.0251 | 0.026 | 0.0335 | 0.035 | 0.0359 | 0.0336 | 0.02705 | 0.0238 | 0.0167 | 0.018 | 0.01935 | 0.0253 | 0.0245 | 0.0266 | 0.0368 | 0.0355 | — | 0.0335 | — | — | 0.0161 | 0.0171 | 0.0206 | 0.0249 | 0.0203 | 0.0306 | 0.041 | 0.031 | 0.0385 | 0.0371 | 0.0358 |
| SO₂ (ppm) | — | — | — | — | — | — | 0.00484 | 0.00187 | 0.00167 | 0.00624 | 0.00223 | 0.002 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.00136 | 0.00111 | 0.00143 | 0.0035 | — | — | 0.0025 | 0.00131 | 0.00105 | 0.00132 | 0.00135 | 0.00183 | 0.00175 | — | 0.00137 | — | — | — | 0.00233 | 0.00375 | 0.00143 | 0.00141 | 0.00275 | 0.00186 | 0.00167 | 0.00186 | 0.00129 | 0.00125 |
| CO (ppm) | 0.941 | 0.6775 | 0.654 | 0.8 | 1.007 | 1.0275 | 0.755 | 0.857 | 0.818 | 0.502 | 0.6285 | 0.922 | 0.974 | 0.683 | 0.74 | 0.578 | 1.24 | 1.45 | 1.3 | 1.66 | 1.62 | — | — | — | — | 1.63 | 1.13 | 1.22 | 1.54 | 1.24 | 1.45 | 1.58 | 1.31 | 0.983 | 1.207 | 1.0945 | 0.856 | 0.597 | 1.3 | 1.06 | 1.04 | 0.857 | 1.08 | 0.444 | 0.537 | 0.712 | 0.444 | 0.631 | 0.701 | 0.864 | 0.726 | 1.01 | 0.807 | 1.01 | 1.23 | 1.25 |
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 · Chong Nonsi, Yannawa
Chong Nonsi, Yannawa
Station code: Chong Nonsi, Yannawa
Monthly monitoring station data.
PM10Lowest 24.7 2016-06Highest 75.9 2020-022015-10 - 2020-05
O₃ (ppm)Lowest 0.00557 2019-06Highest 0.0245 2017-012015-10 - 2020-05
NO₂ (ppm)Lowest 0.0064 2020-05Highest 0.041 2016-022015-10 - 2020-05
SO₂ (ppm)Lowest 0.00105 2017-05Highest 0.00624 2019-082015-10 - 2020-05
CO (ppm)Lowest 0.286 2019-08Highest 1.79 2017-102015-10 - 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 | 2017-03 | 2017-02 | 2017-01 | 2016-12 | 2016-11 | 2016-10 | 2016-09 | 2016-08 | 2016-07 | 2016-06 | 2016-05 | 2016-04 | 2016-03 | 2016-02 | 2016-01 | 2015-12 | 2015-11 | 2015-10 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM10 µg/m³ | 30.6 | 38.3 | 49.5 | 75.9 | 70.9 | 62.1 | 57.6 | 52.3 | 55.7 | 42.2 | 55.3 | 60.3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 52.7 | 34.8 | 38.4 | 51.6 | — | — | 25.8 | 31.5 | 37.9 | 43.1 | 52.3 | 64.3 | 61.2 | — | 55.8 | 29 | 26 | 31.9 | 27.8 | 24.7 | 27.9 | 43.6 | 57.5 | 68.6 | 49.5 | 64.1 | 46.3 | 53.1 |
| O₃ (ppm) | — | 0.00844 | 0.0132 | 0.0229 | 0.021 | 0.0202 | 0.0188 | 0.0151 | 0.0129 | 0.00744 | 0.00977 | 0.00557 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.011 | 0.0122 | 0.00829 | 0.0133 | 0.0131 | 0.0227 | 0.0245 | — | 0.0164 | — | — | 0.0141 | 0.013 | 0.0109 | 0.0204 | 0.011 | 0.0138 | 0.0203 | 0.0154 | 0.0161 | 0.0113 | 0.0119 |
| NO₂ (ppm) | 0.0064 | 0.00962 | 0.0191 | 0.0314 | 0.0307 | 0.0377 | 0.0371 | 0.0306 | 0.0235 | 0.0142 | 0.016 | 0.0101 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.0315 | 0.0361 | 0.0332 | 0.026 | — | — | — | 0.0179 | 0.0253 | 0.0245 | 0.0266 | 0.0368 | 0.0355 | — | 0.0335 | — | — | 0.0161 | 0.0171 | 0.0206 | 0.0249 | 0.0203 | 0.0306 | 0.041 | 0.031 | 0.0385 | 0.0371 | 0.0358 |
| SO₂ (ppm) | — | — | — | — | — | — | 0.00484 | 0.00187 | 0.00167 | 0.00624 | 0.00223 | 0.002 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 0.00136 | 0.00111 | 0.00143 | 0.0035 | — | — | 0.0025 | 0.00131 | 0.00105 | 0.00132 | 0.00135 | 0.00183 | 0.00175 | — | 0.00137 | — | — | — | 0.00233 | 0.00375 | 0.00143 | 0.00141 | 0.00275 | 0.00186 | 0.00167 | 0.00186 | 0.00129 | 0.00125 |
| CO (ppm) | — | 0.451 | 0.335 | 0.52 | 0.594 | 0.515 | 0.539 | 0.494 | 0.476 | 0.286 | 0.297 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1.78 | — | 1.57 | 1.79 | — | — | 1.46 | 1.28 | 0.856 | 0.597 | 1.3 | 1.06 | 1.04 | — | 1.08 | 0.444 | 0.537 | 0.424 | 0.444 | 0.631 | 0.701 | 0.864 | 0.726 | 1.01 | 0.807 | 1.01 | 1.23 | 1.25 |
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 ↗Thailand
AIR QUALITY ARCHIVE · Rama IV Rd., Pathum Wan
Rama IV Rd., Pathum Wan
Station code: Rama IV Rd., Pathum Wan
Monthly monitoring station data.
PM10Lowest 34.2 2019-08Highest 248 2016-122016-08 - 2020-05
NO₂ (ppm)Lowest 0.016 2020-05Highest 0.0488 2019-012016-08 - 2020-05
CO (ppm)Lowest 0.578 2019-02Highest 1.66 2018-102016-08 - 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 | 2017-03 | 2017-02 | 2017-01 | 2016-12 | 2016-11 | 2016-10 | 2016-09 | 2016-08 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM10 µg/m³ | 34.2 | 43 | 48.7 | 77.7 | 69.2 | 64.8 | 60 | 50.3 | 49.5 | 34.2 | 43.9 | 42 | 60.4 | 38 | 49.4 | 51 | 88.2 | 75.3 | 72.1 | 52.7 | 47.7 | 43.7 | 50 | 39.3 | 38.5 | 46.7 | 54.1 | 72.3 | 68.3 | 65.4 | 61.2 | 51.9 | 46.5 | 40.4 | 42.5 | 44.2 | — | — | — | — | — | 248 | — | — | — | 91 |
| NO₂ (ppm) | 0.016 | 0.0185 | 0.0183 | 0.0294 | 0.0344 | 0.039 | 0.0407 | 0.0346 | 0.0283 | 0.0181 | 0.0215 | 0.0239 | 0.0267 | 0.0212 | 0.0252 | 0.0252 | 0.0488 | 0.0395 | 0.0414 | 0.0403 | 0.0344 | 0.0233 | 0.0245 | 0.0247 | 0.0306 | 0.0251 | 0.026 | 0.0335 | 0.0385 | 0.0357 | 0.034 | 0.0281 | 0.0238 | 0.0167 | 0.018 | 0.0208 | — | — | — | — | — | — | — | — | — | — |
| CO (ppm) | 0.941 | 0.904 | 0.973 | 1.08 | 1.42 | 1.54 | 0.971 | 1.22 | 1.16 | 0.718 | 0.96 | 0.922 | 0.974 | 0.683 | 0.74 | 0.578 | 1.24 | 1.45 | 1.3 | 1.66 | 1.62 | — | — | — | — | 1.63 | 1.13 | 1.22 | 1.3 | 1.24 | 1.33 | 1.37 | 1.31 | 0.983 | 0.954 | 0.909 | — | — | — | — | — | 0.857 | — | — | — | 1 |
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 ↗Thailand
Environment and quality of life ratings · Bangkok
Archived ratings of the local environment: green spaces, cleanliness, noise and water quality. Opinion indicators are separate from pollutant concentration measurements.
| Indicator | Bangkok | laoPDR | Cambodia | Vietnam | Myanmar | Malaysia |
|---|---|---|---|---|---|---|
| Green and Parks in the City | 43% | 37% | 36% | 42% | 33% | 54% |
| particulate matter PM2.5 (µg/m³) | 28 | — | — | — | — | — |
| Pleasure of spending time in the city | 37% | 38% | 32% | 30% | 24% | 48% |
| particulate matter PM10 (µg/m³) | 41 | — | — | — | — | — |
| Air Pollution | 74% | 72% | 68% | 78% | 83% | 53% |
| Garbage Disposal | 40% | 20% | 25% | 24% | 12% | 47% |
| Availability and quality of drinking water | 50% | 51% | 48% | 43% | 34% | 56% |
| Cleanliness and tidiness | 35% | 32% | 25% | 29% | 18% | 47% |
| Noise and Light pollution | 59% | 55% | 59% | 65% | 52% | 49% |
| Water Pollution | 70% | 73% | 73% | 73% | 74% | 62% |
Air quality in nearby cities
All cities →Thailand↗
Pak Kret
PM2.55.1
PM105.3
µg/m³
PM2.5 · FairNO₂ 15.9O₃ 32
September 27, 202608:00
Thailand↗
Samut Prakan Province
PM2.52.1
PM102.5
µg/m³
PM2.5 · GoodNO₂ 6.9O₃ 41
September 27, 202608:00
Thailand↗
Khlong Luang District
PM2.53
PM103.3
µg/m³
PM2.5 · GoodNO₂ 9.2O₃ 38
September 27, 202608:00
Thailand↗
Rangsit
PM2.53
PM103.3
µg/m³
PM2.5 · GoodNO₂ 9.2O₃ 38
September 27, 202608:00
Thailand↗
Nakhon Pathom
PM2.52.4
PM102.5
µg/m³
PM2.5 · GoodNO₂ 7O₃ 35
September 27, 202608:00
Thailand↗
Chonburi
PM2.52.4
PM103.3
µg/m³
PM2.5 · GoodNO₂ 5.7O₃ 44
September 27, 202608:00
Thailand↗
Si Racha
PM2.52.4
PM103.3
µg/m³
PM2.5 · GoodNO₂ 5.7O₃ 44
September 27, 202608:00
Thailand↗
Rayong
PM2.52.6
PM103.7
µg/m³
PM2.5 · GoodNO₂ 3.9O₃ 43
September 27, 202608:00
Thailand · air quality in other cities
WEATHER & SURROUNDINGS
Bangkok · weather forecast
Daily maximum and minimum temperatures. Forecast point: 13.754, 100.5014.
Scroll the forecast to see the following days.
Bangkok · September 24, 2026: minimum temperature 26.4°C, maximum 31.2°C. Wind: 15.5 km/h. Humidity: 78%.
Full forecast: temperature, rainfall, wind and humidity
| Date | Day °C | Min °C | Max °C | Night °C | Rain mm | Wind m/s | Humidity % | Clouds % |
|---|---|---|---|---|---|---|---|---|
| 2026-09-24 | 29.2 | 26.4 | 31.2 | 28.5 | 18.3 | 4.3 | 78 | 100 |
| 2026-09-25 | 26.6 | 25.4 | 29.2 | 26.8 | 78.6 | 6.2 | 94 | 100 |
| 2026-09-26 | 25.5 | 24.3 | 27 | 25.6 | 135.3 | 7.8 | 96 | 100 |
| 2026-09-27 | 29.8 | 26.2 | 30.6 | 28.3 | 1.4 | 5.3 | 77 | 100 |
| 2026-09-28 | 27 | 25.1 | 28.6 | 25.7 | 4.7 | 4.7 | 80 | 100 |
| 2026-09-29 | 29.6 | 25.3 | 30.2 | 26.8 | 0.2 | 3.7 | 63 | 100 |
| 2026-09-30 | 32.6 | 25.9 | 32.6 | 28 | 0.7 | 2.3 | 53 | 97 |
| 2026-10-01 | 32.6 | 26.8 | 33.2 | 28.7 | 3.7 | 2.7 | 53 | 98 |
| 2026-10-02 | 33.7 | 27.1 | 34 | 29.6 | 0.2 | 3.3 | 51 | 78 |
| 2026-10-03 | 34.1 | 27.4 | 34.2 | 29.7 | 0.4 | 4 | 46 | 40 |
| 2026-10-04 | 34.3 | 27.3 | 34.4 | 30 | 2.7 | 4.2 | 47 | 66 |
| 2026-10-05 | 34.1 | 27 | 34.4 | 30.1 | 0.5 | 4.9 | 45 | 68 |
| 2026-10-06 | 32.7 | 27.5 | 33.7 | 29.3 | 0.3 | 3.3 | 49 | 91 |
| 2026-10-07 | 29.9 | 26.6 | 30.4 | 26.8 | 36.4 | 1.8 | 69 | 86 |
| 2026-10-08 | 30.1 | 25.1 | 30.7 | 27 | 16.2 | 4 | 61 | 91 |
| 2026-10-09 | 31.3 | 24.6 | 31.5 | 27.1 | 3.2 | 2.6 | 48 | 63 |
| 2026-10-10 | 30.8 | 24.1 | 31.5 | 26.6 | 6.6 | 2.8 | 44 | 73 |
| 2026-10-11 | 31.4 | 23.9 | 31.7 | 27.3 | — | 3.2 | 44 | 83 |
UV index by day · Bangkok
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.
Bangkok · September 26, 2026: UV index: 0.7 .
| Indicator | 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 | 2026-10-11 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index | 0.7 | 5.5 | 5.4 | 6.3 | 8.1 | 8.1 | 8.5 | 8.6 | 8.3 | 8.5 | 6.8 | 7.4 | 8 | 8.4 | 8.4 | — |
AIR QUALITY QUESTIONS
Bangkok · air pollution - questions and answers
What do the latest air quality data show for Bangkok?
Bangkok - latest available concentrations (September 27, 2026, 08:00 local time): PM2.5: 2.1 µg/m³, PM10: 2.5 µg/m³, O₃: 41 µg/m³, NO₂: 6.9 µg/m³, SO₂: 2.5 µg/m³, CO: 467 µg/m³. These are hourly CAMS model values for a point representing the city.
When was PM2.5 highest in Bangkok over the past week?
The highest available daily mean PM2.5 was 20 µg/m³ (September 24, 2026). This comparison covers 7 days with data in the seven days before September 27, 2026. The day of the latest reading is excluded because it may be incomplete.
What period does the pollution history for Bangkok cover?
Available monthly means cover 2015-10 - 2020-05. The tables include PM10, O₃ (ppm), NO₂ (ppm), SO₂ (ppm), CO (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 Bangkok 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 Bangkok?
For September 26, 2026, the forecast UV index is 0.7. The UV section also shows the following available days.
What wind speed is forecast for Bangkok?
For September 24, 2026, forecast wind speed is 15.5 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.