SmogRank / Thailand / Kanchanaburi / Kanchanaburi

Kanchanaburi, month by month

Kanchanaburi has a measured daily mean on 725 days since 1 January 2023. Its worst month was April 2024, at 123 US AQI (44.4 µg/m³), 39th of 2,520 cities on that month's world ranking. Its cleanest was September 2025, at 56 US AQI (11.8 µg/m³).

Every month since 2023

202681 so far245 days measured257th of 2,791 in the world
Jan101#118Feb94#223Mar82#398Apr96#194May75#253Jun66#283Jul3 daysAug64#349Sep67#308Oct81#54
2025too few days for a mean (a year needs 256)212 days measured
Jan3 daysFeb111#107Mar107#179Apr80#236May19 daysJun60#534JulnoneAug6 daysSep56#481Oct10 daysNov12 daysDec83#346
2024too few days for a mean (a year needs 257)178 days measured
Jan21 daysFeb18 daysMar17 daysApr123#39May82#85Jun71#93Jul16 daysAug17 daysSep5 daysOct1 dayNov3 daysDec1 day
2023too few days for a mean (a year needs 256)90 days measured
Jan72#145Feb2 daysMar9 daysApr18 daysMay14 daysJun12 daysJul7 daysAug3 daysSep3 daysOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Kanchanaburi's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Kanchanaburi marked; each year, the year's. A dashed square is the running month, so far.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Months without a mean, and why

27 months
MonthWhy
Jul 20263 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Nov 202512 of 30 days measured; a month needs 21. The others: 18 with under 18 hours of readings or readings that failed our checks.
Oct 202510 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks.
Aug 20256 of 31 days measured; a month needs 22. The others: 25 with under 18 hours of readings or readings that failed our checks.
Jul 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
May 202519 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Jan 20253 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Dec 20241 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Nov 20243 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
Oct 20241 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Sep 20245 of 30 days measured; a month needs 21. The others: 25 with under 18 hours of readings or readings that failed our checks.
Aug 202417 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Jul 202416 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks.
Mar 202417 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Feb 202418 of 29 days measured; a month needs 21. The others: 1 missing from OpenAQ's archive, 10 with under 18 hours of readings or readings that failed our checks.
Jan 202421 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Dec 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 20233 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
Aug 20233 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jul 20237 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 23 with under 18 hours of readings or readings that failed our checks.
Jun 202312 of 30 days measured; a month needs 21. The others: 18 with under 18 hours of readings or readings that failed our checks.
May 202314 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Apr 202318 of 30 days measured; a month needs 21. The others: 2 missing from OpenAQ's archive, 10 with under 18 hours of readings or readings that failed our checks.
Mar 20239 of 31 days measured; a month needs 22. The others: 19 missing from OpenAQ's archive, 3 with under 18 hours of readings or readings that failed our checks.
Feb 20232 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 1 with under 18 hours of readings or readings that failed our checks.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Kanchanaburi's worst months

MonthUS AQIDays measuredWorld rankEpisode
April 2024 12344.4 µg/m³28 of 3039thof 2,520–
February 2025 11139.4 µg/m³27 of 28107thof 2,633–
March 2025 10738.0 µg/m³25 of 31179thof 2,862Thailand and Laos, March 2025
January 2026 10135.5 µg/m³31 of 31118thof 2,617–
April 2026 9633.1 µg/m³30 of 30194thof 2,941–
February 2026 9432.2 µg/m³28 of 28223rdof 2,866–

Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.

Kanchanaburi's worst days

DayUS AQIEpisode
15 Feb 2024 189109.0 µg/m³Thailand, February 2024
2 Apr 2024 16677.2 µg/m³–
7 Feb 2024 16574.9 µg/m³Northern Thailand, February 2024
6 Feb 2024 16270.5 µg/m³–
23 Jan 2024 16169.3 µg/m³–
31 Jan 2024 16169.1 µg/m³–
23 Mar 2024 15967.3 µg/m³–
24 Jan 2024 15866.0 µg/m³–
24 Mar 2025 15865.1 µg/m³Thailand and Laos, March 2025
29 Jan 2024 15764.3 µg/m³–

Daily means, the highest since 1 Jan 2023; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.

Use this history

SmogRank, PM2.5 monthly and daily means, Kanchanaburi, Thailand, 1 Jan 2023 – 12 Oct 2026. Monitor data from Air4Thai via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/th/kanchanaburi/history (accessed 12 Oct 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

Kanchanaburi now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 20:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).