SmogRank / Thailand

Air quality in Chiang Khong

Chiang Rai, Thailand. Measured until 31 May 2026; not measured today, so it is only on past boards. We make model estimates only for places of 15,000 people or more.

Its measured days

SmogRank measured Chiang Khong with ground monitors from Air4Thai from 2 Jan 2023 to 31 May 2026: 460 days, averaging 51.9 µg/m³. Its monitors stopped giving readings we can use, so it isn't ranked today, but those days stay on the past boards: 460 day boards, 11 of them at #1.

1102031Jun 2025JulAugSepOctNovDecJan 2026FebMarAprMay2025-06-01: no data2025-06-02: no data2025-06-03: no data2025-06-04: no data2025-06-05: no data2025-06-06: no data2025-06-07: no data2025-06-08: no data2025-06-09: no data2025-06-10: no data2025-06-11: no data2025-06-12: no data2025-06-13: no data2025-06-14: no data2025-06-15: no data2025-06-16: no data2025-06-17: no data2025-06-18: no data2025-06-19: no data2025-06-20: no data2025-06-21: no data2025-06-22: no data2025-06-23: no data2025-06-24: no data2025-06-25: no data2025-06-26: no data2025-06-27: no data2025-06-28: no data2025-06-29: no data2025-06-30: no data2025-07-01: no data2025-07-02: no data2025-07-03: no data2025-07-04: no data2025-07-05: no data2025-07-06: no data2025-07-07: no data2025-07-08: no data2025-07-09: no data2025-07-10: no data2025-07-11: no data2025-07-12: no data2025-07-13: no data2025-07-14: no data2025-07-15: no data2025-07-16: no data2025-07-17: no data2025-07-18: no data2025-07-19: no data2025-07-20: no 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data2025-09-11: no data2025-09-12: no data2025-09-13: no data2025-09-14: no data2025-09-15: no data2025-09-16: no data2025-09-17: no data2025-09-18: no data2025-09-19: no data2025-09-20: no data2025-09-21: no data2025-09-22: no data2025-09-23: no data2025-09-24: no data2025-09-25: no data2025-09-26: no data2025-09-27: no data2025-09-28: no data2025-09-29: no data2025-09-30: no data2025-10-01: no data2025-10-02: no data2025-10-03: no data2025-10-04: no data2025-10-05: no data2025-10-06: no data2025-10-07: no data2025-10-08: no data2025-10-09: no data2025-10-10: no data2025-10-11: no data2025-10-12: no data2025-10-13: no data2025-10-14: no data2025-10-15: no data2025-10-16: no data2025-10-17: no data2025-10-18: no data2025-10-19: no data2025-10-20: no data2025-10-21: no data2025-10-22: no data2025-10-23: no data2025-10-24: no data2025-10-25: no data2025-10-26: no data2025-10-27: no data2025-10-28: no data2025-10-29: no data2025-10-30: no data2025-10-31: no data2025-11-01: no data2025-11-02: no data2025-11-03: no data2025-11-04: no data2025-11-05: no data2025-11-06: no data2025-11-07: no data2025-11-08: no data2025-11-09: no data2025-11-10: no data2025-11-11: no data2025-11-12: no data2025-11-13: no data2025-11-14: no data2025-11-15: no data2025-11-16: no data2025-11-17: no data2025-11-18: no data2025-11-19: no data2025-11-20: no data2025-11-21: no data2025-11-22: no data2025-11-23: no data2025-11-24: no data2025-11-25: no data2025-11-26: 23.0 µg/m³2025-11-27: 22.3 µg/m³2025-11-28: 22.4 µg/m³2025-11-29: 22.2 µg/m³2025-11-30: 25.6 µg/m³2025-12-01: 24.6 µg/m³2025-12-02: 25.7 µg/m³2025-12-03: 31.6 µg/m³2025-12-04: 19.7 µg/m³2025-12-05: 20.7 µg/m³2025-12-06: 21.9 µg/m³2025-12-07: no data2025-12-08: no data2025-12-09: 17.8 µg/m³2025-12-10: 17.8 µg/m³2025-12-11: 19.4 µg/m³2025-12-12: 16.9 µg/m³2025-12-13: 8.8 µg/m³2025-12-14: 7.7 µg/m³2025-12-15: 9.5 µg/m³2025-12-16: 9.5 µg/m³2025-12-17: 11.4 µg/m³2025-12-18: 10.4 µg/m³2025-12-19: 9.5 µg/m³2025-12-20: 12.9 µg/m³2025-12-21: 16.6 µg/m³2025-12-22: 13.9 µg/m³2025-12-23: 16.0 µg/m³2025-12-24: 17.8 µg/m³2025-12-25: 18.7 µg/m³2025-12-26: 17.8 µg/m³2025-12-27: 17.6 µg/m³2025-12-28: 18.1 µg/m³2025-12-29: 20.6 µg/m³2025-12-30: 22.7 µg/m³2025-12-31: 24.2 µg/m³2026-01-01: 29.7 µg/m³2026-01-02: 21.9 µg/m³2026-01-03: 20.0 µg/m³2026-01-04: 17.2 µg/m³2026-01-05: 16.4 µg/m³2026-01-06: 15.0 µg/m³2026-01-07: 14.4 µg/m³2026-01-08: 12.0 µg/m³2026-01-09: 12.1 µg/m³2026-01-10: 14.9 µg/m³2026-01-11: 16.6 µg/m³2026-01-12: 18.4 µg/m³2026-01-13: 21.0 µg/m³2026-01-14: 21.6 µg/m³2026-01-15: 23.4 µg/m³2026-01-16: 22.7 µg/m³2026-01-17: 20.3 µg/m³2026-01-18: 20.3 µg/m³2026-01-19: 19.3 µg/m³2026-01-20: 20.3 µg/m³2026-01-21: 20.0 µg/m³2026-01-22: 18.2 µg/m³2026-01-23: 19.2 µg/m³2026-01-24: 20.6 µg/m³2026-01-25: 22.7 µg/m³2026-01-26: 22.8 µg/m³2026-01-27: 22.6 µg/m³2026-01-28: 25.6 µg/m³2026-01-29: 28.0 µg/m³2026-01-30: 28.0 µg/m³2026-01-31: 30.7 µg/m³2026-02-01: 31.9 µg/m³2026-02-02: 28.2 µg/m³2026-02-03: 25.8 µg/m³2026-02-04: 23.0 µg/m³2026-02-05: 23.2 µg/m³2026-02-06: 28.7 µg/m³2026-02-07: 33.1 µg/m³2026-02-08: 31.5 µg/m³2026-02-09: 29.3 µg/m³2026-02-10: 23.5 µg/m³2026-02-11: 22.8 µg/m³2026-02-12: 23.1 µg/m³2026-02-13: 21.6 µg/m³2026-02-14: 22.8 µg/m³2026-02-15: 27.1 µg/m³2026-02-16: 29.1 µg/m³2026-02-17: 26.8 µg/m³2026-02-18: 26.9 µg/m³2026-02-19: 29.2 µg/m³2026-02-20: 21.6 µg/m³2026-02-21: 21.5 µg/m³2026-02-22: 35.6 µg/m³2026-02-23: 39.3 µg/m³2026-02-24: 41.8 µg/m³2026-02-25: 27.4 µg/m³2026-02-26: 9.8 µg/m³2026-02-27: 13.6 µg/m³2026-02-28: 26.0 µg/m³2026-03-01: 28.6 µg/m³2026-03-02: 29.6 µg/m³2026-03-03: 51.0 µg/m³2026-03-04: 63.4 µg/m³2026-03-05: 67.5 µg/m³2026-03-06: 51.8 µg/m³2026-03-07: 38.6 µg/m³2026-03-08: 43.1 µg/m³2026-03-09: 56.9 µg/m³2026-03-10: 41.0 µg/m³2026-03-11: 21.8 µg/m³2026-03-12: 27.0 µg/m³2026-03-13: 18.8 µg/m³2026-03-14: 19.0 µg/m³2026-03-15: 24.5 µg/m³2026-03-16: 26.7 µg/m³2026-03-17: 29.8 µg/m³2026-03-18: 29.7 µg/m³2026-03-19: 43.6 µg/m³2026-03-20: 50.7 µg/m³2026-03-21: 63.8 µg/m³2026-03-22: 54.5 µg/m³2026-03-23: 34.4 µg/m³2026-03-24: 44.1 µg/m³2026-03-25: 76.0 µg/m³2026-03-26: 82.0 µg/m³2026-03-27: 164.0 µg/m³2026-03-28: 153.0 µg/m³2026-03-29: 154.0 µg/m³2026-03-30: 151.0 µg/m³2026-03-31: 181.0 µg/m³2026-04-01: 173.0 µg/m³2026-04-02: 214.0 µg/m³2026-04-03: 218.0 µg/m³2026-04-04: 211.0 µg/m³2026-04-05: 223.0 µg/m³2026-04-06: 170.0 µg/m³2026-04-07: 124.0 µg/m³2026-04-08: 84.5 µg/m³2026-04-09: 84.2 µg/m³2026-04-10: 102.0 µg/m³2026-04-11: 114.0 µg/m³2026-04-12: 121.0 µg/m³2026-04-13: 190.0 µg/m³2026-04-14: 219.0 µg/m³2026-04-15: 187.0 µg/m³2026-04-16: 192.0 µg/m³2026-04-17: 179.0 µg/m³2026-04-18: 164.0 µg/m³2026-04-19: 201.0 µg/m³2026-04-20: 115.0 µg/m³2026-04-21: 105.0 µg/m³2026-04-22: 115.0 µg/m³2026-04-23: 72.6 µg/m³2026-04-24: 55.2 µg/m³2026-04-25: 57.7 µg/m³2026-04-26: 41.0 µg/m³2026-04-27: 38.5 µg/m³2026-04-28: 27.7 µg/m³2026-04-29: 23.7 µg/m³2026-04-30: 29.8 µg/m³2026-05-01: 27.8 µg/m³2026-05-02: 34.2 µg/m³2026-05-03: 31.1 µg/m³2026-05-04: 27.1 µg/m³2026-05-05: 22.6 µg/m³2026-05-06: 22.1 µg/m³2026-05-07: 25.0 µg/m³2026-05-08: 17.6 µg/m³2026-05-09: 11.3 µg/m³2026-05-10: 11.1 µg/m³2026-05-11: 8.3 µg/m³2026-05-12: 9.0 µg/m³2026-05-13: 9.6 µg/m³2026-05-14: 12.6 µg/m³2026-05-15: 12.1 µg/m³2026-05-16: 6.5 µg/m³2026-05-17: 11.4 µg/m³2026-05-18: 16.7 µg/m³2026-05-19: 23.3 µg/m³2026-05-20: 24.6 µg/m³2026-05-21: 20.0 µg/m³2026-05-22: 19.3 µg/m³2026-05-23: 15.9 µg/m³2026-05-24: 12.2 µg/m³2026-05-25: 9.7 µg/m³2026-05-26: 11.0 µg/m³2026-05-27: 14.2 µg/m³2026-05-28: 22.1 µg/m³2026-05-29: 17.0 µg/m³2026-05-30: 10.5 µg/m³2026-05-31: 9.0 µg/m³
Its last 12 measured months, one row per month, each square a day's mean PM2.5. Blank: no measured value that day.

Its highest places on the daily boards

DayRankµg/m³
16 Apr 2026#1of 2,678 192.0
14 Apr 2026#1of 2,904 219.0
6 Apr 2026#1of 2,931 170.0
5 Apr 2026#1of 2,944 223.0
4 Apr 2026#1of 2,979 211.0
3 May 2024#1of 2,670 177.0
2 May 2024#1of 2,665 237.0
1 May 2024#1of 2,665 164.0
8 Apr 2024#1of 2,504 155.0
7 Apr 2024#1of 2,562 185.0

Use this history

SmogRank, measured PM2.5 daily means, Chiang Khong, Thailand, 2 Jan 2023 to 31 May 2026, smogrank.com/th/chiang-khong (accessed 5 Oct 2026).

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.

Cities measured in Thailand today