SmogRank / United States / Oklahoma / Oklahoma City
Oklahoma City, month by month
Oklahoma City has a measured daily mean on 1,303 days since 1 January 2023. Its worst month was May 2023, at 59 US AQI (13.3 µg/m³), 199th of 1,600 cities on that month's world ranking. Its cleanest was November 2024, at 34 US AQI (6.1 µg/m³). 2025 averaged 48 US AQI (8.6 µg/m³), against 51 US AQI (9.1 µg/m³) in 2024.
Every month since 2023
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
2 months
| Month | Why |
|---|---|
| Jul 2026 | 14 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks. |
| Jul 2023 | 16 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 14 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.
Oklahoma City's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| May 2023 | 5913.3 µg/m³ | 199thof 1,600 | – |
| August 2023 | 5611.7 µg/m³ | 375thof 1,980 | – |
| August 2024 | 5611.6 µg/m³ | 379thof 2,010 | Southern and eastern United States and Mexico, July and August 2024 |
| July 2024 | 5410.9 µg/m³ | 576thof 2,566 | Southern and eastern United States and Mexico, July and August 2024 |
| September 2023 | 5410.8 µg/m³ | 451stof 2,176 | – |
| June 2023 | 5410.7 µg/m³ | 686thof 1,603 | – |
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.
Oklahoma City's worst days
| Day | US AQI | Episode |
|---|---|---|
| 14 Mar 2025 | 11943.0 µg/m³ | United States and Mexico, March 2025 |
| 9 Apr 2024 | 9734.0 µg/m³ | – |
| 1 Aug 2024 | 9532.5 µg/m³ | Southern and eastern United States and Mexico, July and August 2024 |
| 28 Jan 2026 | 9331.4 µg/m³ | Central United States, January 2026 |
| 5 Apr 2024 | 8828.9 µg/m³ | Oklahoma and Kansas, United States, April 2024 |
| 26 Feb 2023 | 8628.0 µg/m³ | Texas and Oklahoma, United States, February 2023 |
| 29 Jan 2026 | 8024.6 µg/m³ | Central United States, January 2026 |
| 14 May 2024 | 7722.9 µg/m³ | – |
| 12 May 2023 | 7622.6 µg/m³ | – |
| 23 May 2023 | 7622.4 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, Oklahoma City, United States, 1 Jan 2023 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/oklahoma-city/history (accessed 13 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.
Oklahoma City now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 02:07 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).