SmogRank / Thailand / Lampang / Lampang

Lampang, month by month

Lampang has a measured daily mean on 487 days since 1 January 2023. Its worst month was April 2026, at 170 US AQI (82.1 µg/m³), 15th of 2,941 cities on that month's world ranking. Its cleanest was June 2024, at 55 US AQI (11.4 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 200)104 days measured
Jan15 daysFeb91#252Mar155#46Apr170#15May10 daysJun9 daysJulnoneAugnoneSepnoneOctnone
2025too few days for a mean (a year needs 256)93 days measured
Jan10 daysFeb16 daysMar20 daysApr18 daysMay3 daysJunnoneJulnoneAugnoneSep3 daysOct2 daysNov7 daysDec14 days
2024too few days for a mean (a year needs 257)203 days measured
Jan120#54Feb163#10Mar19 daysApr162#10May93#63Jun55#414Jul18 daysAug19 daysSep5 daysOct3 daysNov3 daysDec1 day
2023too few days for a mean (a year needs 256)87 days measured
Jan122#26Feb2 daysMar9 daysApr17 daysMay15 daysJun11 daysJul5 daysAug3 daysSep3 daysOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Lampang'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 Lampang 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

37 months
MonthWhy
Oct 2026No day measured. The others: 12 with readings for part of the day (a day needs 18 hours).
Sep 2026No day measured. The others: 30 with readings for part of the day (a day needs 18 hours).
Aug 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jun 20269 of 30 days measured; a month needs 21. The others: 21 with under 18 hours of readings or readings that failed our checks.
May 202610 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks.
Jan 202615 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks.
Dec 202514 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Nov 20257 of 30 days measured; a month needs 21. The others: 23 with under 18 hours of readings or readings that failed our checks.
Oct 20252 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Sep 20253 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
Aug 2025No day measured. The others: 31 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.
Jun 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 20253 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Apr 202518 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks.
Mar 202520 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Feb 202516 of 28 days measured; a month needs 20. The others: 12 with under 18 hours of readings or readings that failed our checks.
Jan 202510 of 31 days measured; a month needs 22. The others: 21 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 20243 of 31 days measured; a month needs 22. The others: 28 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 202418 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Mar 202419 of 31 days measured; a month needs 22. The others: 12 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 202311 of 30 days measured; a month needs 21. The others: 19 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 202317 of 30 days measured; a month needs 21. The others: 2 missing from OpenAQ's archive, 11 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.

Lampang's worst months

MonthUS AQIDays measuredWorld rankEpisode
April 2026 17082.1 µg/m³24 of 3015thof 2,941–
February 2024 16372.7 µg/m³23 of 2910thof 2,486Thailand, February 2024
Northern Thailand and Laos, February 2024
April 2024 16271.2 µg/m³29 of 3010thof 2,520Thailand and Laos, April and May 2024
March 2026 15560.6 µg/m³23 of 3146thof 2,971–
January 2023 12243.9 µg/m³22 of 3126thof 1,261Northern Thailand and Laos, January and February 2023
January 2024 12043.1 µg/m³24 of 3154thof 2,385–

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.

Lampang's worst days

DayUS AQIEpisode
15 Feb 2023 257182.0 µg/m³North-western Thailand and Laos, February 2023
7 Apr 2023 257182.0 µg/m³Northern Thailand and Laos around Bangkok, 5 to 8 April 2023
7 Mar 2024 253178.0 µg/m³Northern Thailand and Laos, March 2024
1 Apr 2023 229154.0 µg/m³Northern Thailand and Laos, March and April 2023
8 Apr 2023 222147.0 µg/m³Northern Thailand and Laos around Bangkok, 5 to 8 April 2023
16 Apr 2023 204129.0 µg/m³–
2 Apr 2026 199124.0 µg/m³–
3 Apr 2026 199124.0 µg/m³–
4 Apr 2026 198122.0 µg/m³–
5 Apr 2026 198122.0 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, Lampang, Thailand, 1 Jan 2023 – 29 Jun 2026. Monitor data from Air4Thai via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/th/lampang/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.

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

Updated 2026-10-12 19:07 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).