SmogRank / Thailand / Sa Kaeo / Aranyaprathet

Aranyaprathet, month by month

Aranyaprathet has a measured daily mean on 716 days since 1 January 2023. Its worst month was January 2024, at 124 US AQI (44.7 µg/m³), 46th of 2,385 cities on that month's world ranking. Its cleanest was August 2026, at 34 US AQI (6.2 µg/m³).

Every month since 2023

202669 so far223 days measured402nd of 2,793 in the world
Jan14 daysFeb105#172Mar83#373Apr78#331May58#526Jun50#813Jul3 daysAug34#2,407Sep20 daysOct50#712
2025too few days for a mean (a year needs 256)202 days measured
Jan5 daysFeb109#116Mar87#336Apr66#461May20 daysJun53#1,296JulnoneAug6 daysSep43#1,388Oct9 daysNov12 daysDec13 days
2024too few days for a mean (a year needs 257)200 days measured
Jan124#46Feb105#71Mar20 daysApr69#265May55#539Jun41#1,593Jul20 daysAug19 daysSep5 daysOct2 daysNov3 daysDecnone
2023too few days for a mean (a year needs 256)91 days measured
Jan84#81Feb2 daysMar9 daysApr19 daysMay15 daysJun12 daysJul5 daysAug3 daysSep3 daysOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Aranyaprathet'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 Aranyaprathet 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

28 months
MonthWhy
Sep 202620 of 30 days measured; a month needs 21. The others: 4 with no readings from the monitor, 5 with readings for part of the day (a day needs 18 hours), 1 with under 18 hours of readings or readings that failed our checks.
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.
Jan 202614 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Dec 202513 of 31 days measured; a month needs 22. The others: 18 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 20259 of 31 days measured; a month needs 22. The others: 22 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 202520 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Jan 20255 of 31 days measured; a month needs 22. The others: 26 with under 18 hours of readings or readings that failed our checks.
Dec 2024No day measured. The others: 31 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 20242 of 31 days measured; a month needs 22. The others: 29 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 202419 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Jul 202420 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Mar 202420 of 31 days measured; a month needs 22. The others: 11 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 20235 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 25 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 202315 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
Apr 202319 of 30 days measured; a month needs 21. The others: 2 missing from OpenAQ's archive, 9 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.

Aranyaprathet's worst months

MonthUS AQIDays measuredWorld rankEpisode
January 2024 12444.7 µg/m³23 of 3146thof 2,385–
February 2025 10938.6 µg/m³28 of 28116thof 2,633–
February 2026 10537.3 µg/m³23 of 28172ndof 2,866–
February 2024 10537.0 µg/m³23 of 2971stof 2,486Thailand, February 2024
March 2025 8728.4 µg/m³28 of 31336thof 2,862Thailand and Laos, March 2025
January 2023 8426.8 µg/m³23 of 3181stof 1,261–

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.

Aranyaprathet's worst days

DayUS AQIEpisode
15 Feb 2024 17183.5 µg/m³Thailand, February 2024
25 Jan 2025 17081.9 µg/m³–
24 Jan 2025 16676.2 µg/m³–
24 Mar 2025 16372.4 µg/m³Thailand and Laos, March 2025
14 Feb 2024 16270.9 µg/m³Thailand, February 2024
23 Mar 2025 16169.6 µg/m³Thailand and Laos, March 2025
19 Jan 2025 16169.5 µg/m³–
7 Feb 2025 15966.8 µg/m³–
26 Jan 2025 15866.1 µg/m³–
22 Jan 2024 15866.0 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, Aranyaprathet, Thailand, 1 Jan 2023 – 12 Oct 2026. Monitor data from Air4Thai via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/th/aranyaprathet/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.

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

Updated 2026-10-12 22:07 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).