Air quality
Air quality in Khon Kaen today
Updated
Moderate (US AQI 56) Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. Model estimate for Mon, Oct 26, 8:00 am (01:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Khon Kaen, Thailand, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 56 Moderate
- PM2.5
- 9.8 µg/m³ 0.7× WHO 24-h guideline
- PM10
- 10 µg/m³
- Ozone
- 74 µg/m³
- Dominant pollutant
- PM2.5 sub-index 56
- Best hour today
- 3:00 pm AQI 52
- European AQI
- 30
Air quality in Khon Kaen right now
Right now the modelled US Air Quality Index for Khon Kaen, Thailand is 56, which falls in the "Moderate" band (up to 100). Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors.
The index is driven mainly by PM2.5, whose own sub-index is 56. Fine and coarse particles come from traffic, heating, industry, dust and smoke; they build up on calm nights and clear when wind or rain arrives.
PM2.5 is 9.8 µg/m³, within the WHO 24-hour guideline of 15 µg/m³; PM10 is 10 µg/m³ against a guideline of 45; ozone is 74 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 6 µg/m³ (below the 24-hour guideline of 25).
Also this hour: UV index 1.8, carbon monoxide 320 µg/m³.
NASA FIRMS shows 7 fire hotspots within 300 km in the last day (nearest about 221 km), but particle levels are not elevated enough to point to smoke right now.
Khon Kaen AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 50 around Tue 7:00 am to 64 around Mon 5:00 pm, from "Good" at best to "Moderate" at worst.
The following day is expected to be cleaner, averaging about 41 against 54 for the next 24 hours.
| Local time (Asia/Bangkok) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Mon 8:00 am | 56 | Moderate | 9.8 | 10 | 74 |
| Mon 11:00 am | 54 | Moderate | 9.4 | 10 | 117 |
| Mon 2:00 pm | 53 | Moderate | 7.8 | 8 | 124 |
| Mon 5:00 pm | 64 | Moderate | 9.2 | 10 | 94 |
| Mon 8:00 pm | 52 | Moderate | 18.5 | 19 | 37 |
| Mon 11:00 pm | 52 | Moderate | 8.8 | 9 | 48 |
| Tue 2:00 am | 52 | Moderate | 4.5 | 5 | 62 |
| Tue 5:00 am | 51 | Moderate | 5.4 | 6 | 58 |
| Tue 8:00 am | 50 | Good | 7.1 | 7 | 74 |
| Tue 11:00 am | 49 | Good | 6.2 | 8 | 115 |
| Tue 2:00 pm | 46 | Good | 4.9 | 6 | 104 |
| Tue 5:00 pm | 49 | Good | 5.5 | 6 | 89 |
| Tue 8:00 pm | 43 | Good | 6.7 | 7 | 53 |
| Tue 11:00 pm | 34 | Good | 5.7 | 6 | 54 |
| Wed 2:00 am | 32 | Good | 4.1 | 5 | 58 |
| Wed 5:00 am | 32 | Good | 3.9 | 4 | 71 |
| Wed 8:00 am | 31 | Good | 6.6 | 7 | 101 |
Every third hour of the CAMS forecast via Open-Meteo. US AQI uses rolling averages (24 h for particles, 8 h for ozone), so it moves more slowly than the hourly concentrations.
Best time to be outside in Khon Kaen today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 3:00 pm (AQI 52, Moderate) and the worst around 5:00 pm (AQI 64). That is a swing of 12 points, so a run or walk around 3:00 pm is noticeably better.
Khon Kaen vs the rest of Thailand
Across 24 Thailand cities we track, the average US AQI right now is 55 (Moderate). Khon Kaen at 56 is about average.
For context, the median across 3,556 cities worldwide is 58.
Air quality in cities near Khon Kaen
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Vientiane | 171 km | 62 | Moderate | 7.7 |
| Lat Phrao | 379 km | 56 | Moderate | 14.7 |
| Chatuchak | 380 km | 56 | Moderate | 14.7 |
| Wang Thonglang | 380 km | 56 | Moderate | 14.7 |
| Mueang Nonthaburi | 380 km | 56 | Moderate | 14.7 |
| Din Daeng | 382 km | 56 | Moderate | 14.7 |
| Bang Sue | 383 km | 56 | Moderate | 14.7 |
| Watthana | 387 km | 56 | Moderate | 14.7 |
Model vs measured
The nearest measured PM2.5 reading is 7.1 µg/m³ from Sensor.Community (median of 3 sensors), centred about 2 km from the city centre. That is close to the model estimate of 9.8 µg/m³. Low-cost sensors can read high in humid air; reference monitors are more accurate but sparser.
Advice for sensitive groups
At 56, most people are fine outdoors. If you are unusually sensitive to PM2.5, keep long or intense workouts to the cleaner hours shown above.
What the US AQI numbers mean
| US AQI | Category | What it means |
|---|---|---|
| 0-50 | Good | Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. |
| 51-100 | Moderate | Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. |
| 101-150 | Unhealthy for Sensitive Groups | People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. |
| 151-200 | Unhealthy | Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. |
| 201-300 | Very Unhealthy | Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors. |
| 301-500 | Hazardous | Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500. |
Values on this page are modelled by CAMS (Copernicus) and served by Open-Meteo; they are estimates for the area around the city centre, not readings from an official monitor.
Nearby cities
More for Khon Kaen
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), Sensor.Community, NASA FIRMS.