SmogRank / Thailand / Yala / Betong

Betong, month by month

Betong has a measured daily mean on 667 days since 2 January 2023. Its worst month was February 2024, at 64 US AQI (15.9 µg/m³), 311th of 2,486 cities on that month's world ranking. Its cleanest was September 2025, at 32 US AQI (5.7 µg/m³).

Every month since 2023

202655 so far239 days measured777th of 2,791 in the world
Jan58#879Feb55#1,172Mar57#1,199Apr61#604May39#1,585Jun40#1,374Jul3 daysAug55#677Sep56#510Oct7 days
2025too few days for a mean (a year needs 256)197 days measured
Jan4 daysFeb59#940Mar60#1,051Apr42#1,866May37#1,706Jun50#1,601JulnoneAug5 daysSep32#2,242Oct9 daysNov8 daysDec51#1,536
2024too few days for a mean (a year needs 257)190 days measured
Jan21 daysFeb64#311Mar18 daysApr60#504May59#374Jun54#548Jul19 daysAug19 daysSep4 daysOct2 daysNov3 daysDecnone
2023too few days for a mean (a year needs 256)41 days measured
Jan4 daysFeb1 dayMar4 daysApr16 daysMay10 daysJun3 daysJulnoneAug1 daySep2 daysOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Betong'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 Betong marked; each year, the year's.
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
Oct 20267 of 12 days measured; a month needs 9. The others: 5 with readings for part of the day (a day needs 18 hours).
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 20258 of 30 days measured; a month needs 21. The others: 22 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 20255 of 31 days measured; a month needs 22. The others: 26 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.
Jan 20254 of 31 days measured; a month needs 22. The others: 27 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 20244 of 30 days measured; a month needs 21. The others: 26 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 202419 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Mar 202418 of 31 days measured; a month needs 22. The others: 13 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 20232 of 30 days measured; a month needs 21. The others: 28 with under 18 hours of readings or readings that failed our checks.
Aug 20231 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Jul 2023No day measured. The others: 1 missing from OpenAQ's archive, 30 with under 18 hours of readings or readings that failed our checks.
Jun 20233 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
May 202310 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks.
Apr 202316 of 30 days measured; a month needs 21. The others: 2 missing from OpenAQ's archive, 12 with under 18 hours of readings or readings that failed our checks.
Mar 20234 of 31 days measured; a month needs 22. The others: 19 missing from OpenAQ's archive, 8 with under 18 hours of readings or readings that failed our checks.
Feb 20231 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 2 with under 18 hours of readings or readings that failed our checks.
Jan 20234 of 31 days measured; a month needs 22. The others: 7 missing from OpenAQ's archive, 19 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.

Betong's worst months

MonthUS AQIDays measuredWorld rank
February 2024 6415.9 µg/m³22 of 29311thof 2,486
April 2026 6114.4 µg/m³30 of 30604thof 2,941
April 2024 6013.8 µg/m³28 of 30504thof 2,520
March 2025 6013.7 µg/m³25 of 311,051stof 2,862
February 2025 5913.4 µg/m³28 of 28940thof 2,633
May 2024 5913.3 µg/m³26 of 31374thof 2,684

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.

Betong's worst days

DayUS AQI
9 Oct 2026 11340.3 µg/m³
17 Sept 2026 9934.8 µg/m³
16 Apr 2023 9532.9 µg/m³
8 Oct 2026 9130.8 µg/m³
29 Aug 2026 8728.4 µg/m³
24 Aug 2026 8628.0 µg/m³
17 Apr 2023 8326.4 µg/m³
12 Apr 2023 8125.1 µg/m³
30 Sept 2026 7924.1 µg/m³
23 Aug 2026 7723.3 µg/m³

Daily means, the highest since 2 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, Betong, Thailand, 2 Jan 2023 – 11 Oct 2026. Monitor data from Air4Thai via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/th/betong/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.

Betong 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).