Bangkok air quality
Thailand · Live AQI and hourly forecast for the next 5 days · updated Sun 07:00 local time
Good
Great air. A perfect time to be outside.
- Next 24 hours
- 19–27US AQI, highest around Sun 19:00
- Best time outside
- Sun 07:00–10:00US AQI about 19
- PM2.5 vs WHO guideline
- 0.1×1.6 µg/m³ over 24 h, guideline 15
- Cigarette equivalent
- ≈ 0 a dayBerkeley Earth rule of thumb
- European AQI
- Goodlevel 1 of 6
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Pollutants in Bangkok right now
| Pollutant | Now | Next 24 h vs WHO | US AQI band |
|---|---|---|---|
| Fine particles (PM2.5) | 1.6 µg/m³ | 0.1× | Good |
| Coarse particles (PM10) | 2.0 µg/m³ | 0.0× | Good |
| Nitrogen dioxide (NO2) | 6.7 µg/m³ | 0.2× | Good |
| Ozone (O3) | 41 µg/m³ | 0.6× | Good |
| Sulphur dioxide (SO2) | 2.4 µg/m³ | 0.0× | Good |
| Carbon monoxide (CO) | 452 µg/m³ | 0.1× | Good |
| Desert dust | 0 µg/m³ | ||
| Smoke and haze (aerosol optical depth) | 0.07 | ||
| UV index | 0.1 |
“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 32 around Mon 17:00, lowest 19 around Sun 07:00.
5-day air quality forecast for Bangkok
Daily range of the hourly US AQI, from lowest to highest, on a scale of 0 to 250.
| Day | US AQI | At worst | PM2.5 avg | |
|---|---|---|---|---|
| Sun 27 Sept | 18–27 | 1.5 | ||
| Mon 28 Sept | 22–32 | 2.9 | ||
| Tue 29 Sept | 21–42 | 5.4 | ||
| Wed 30 Sept | 31–117 | 12 | ||
| Thu 1 Oct | 54–205 | 19 |
Common questions about the air in Bangkok
Is the air in Bangkok safe today?
Yes. Right now the US AQI in Bangkok is 19, which counts as good. Great air. A perfect time to be outside.
When is the best time to be outside in Bangkok?
Sun 07:00–10:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 19. The worst hour is around Sun 19:00, at 27.
What is the main pollutant in Bangkok?
Ozone (O3). It drives the index right now, at 41 µg/m³. Formed by sunlight acting on traffic and plant emissions. Highest on hot, still afternoons, often downwind of cities.
How does Bangkok's air compare with the WHO guideline?
Within the guideline. Over the next 24 hours PM2.5 averages about 1.6 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. The other pollutants stay within their guideline levels.
How many cigarettes is a day of Bangkok's air?
Less than a tenth of one. Over the next 24 hours PM2.5 averages about 1.6 µg/m³. By Berkeley Earth's rule of thumb, 22 µg/m³ breathed for a day is roughly one cigarette.
Will air quality in Bangkok improve this week?
Today looks cleanest. Its AQI peaks at 27, against 205 on Thursday, the worst day in the forecast.
Measured near Bangkok
| Station | PM2.5 µg/m³ | Measured |
|---|---|---|
| Unnamed sensor Sensor.Community, low-cost sensor | 4.8 | Sun 07:32 |
| Unnamed sensor Sensor.Community, low-cost sensor | 0.5 | Sun 07:39 |
| Unnamed sensor Sensor.Community, low-cost sensor | 2.0 | Sun 07:39 |
Air quality near Bangkok
- Phnom Penh 539 km SE
- Yangon 577 km NW
- Chiang Mai 582 km N
- Ho Chi Minh City 741 km SE
- Hanoi 987 km NE
- Kuala Lumpur 1,188 km S
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 13.76°N, 100.50°E, updated 2026-09-27 00:00 UTC.