Chiang Mai PM2.5 History & Daily Calendar 2024
Historical source observations, analyses and downloads are unavailable until the required permissions are verified. Inspect official source links and interpretation limits.
Read the analysis →Thailand historical PM2.5 observations
Historical observations and downloads are unavailable until the required permissions are verified.
1 January–31 December 2024 · 366 calendar dates · daily mean PM2.5 (µg/m³)
Bangkok PM2.5 History & Daily Calendar 2024
Historical source observations, analyses and downloads are unavailable until the required permissions are verified. Inspect official source links and interpretation limits.
Read the analysis →Chiang Mai vs Bangkok PM2.5: 2024 Station Comparison
Historical source observations, analyses and downloads are unavailable until the required permissions are verified. Inspect official source links and interpretation limits.
Read the analysis →How to read these observations
- This is one historical year, not live air quality, a 20-year archive or a long-term seasonal normal. March–November comparisons describe 2024 only.
- Values describe selected monitoring stations, not every district or a citywide average. They do not predict conditions at a property or future pollution.
- Missing or invalid measurements stay missing and are excluded from averages. Zero is retained as an observation. Means are calculated from available daily means, without interpolation or AQI conversion.
- Station codes identify the historical series. Coordinates on the linked current-reference pages come from October 2026; historical station relocation has not been verified.