SmogRank / United States / California / King City
King City, month by month
King City has a measured daily mean on 1,206 days since 7 May 2023. Its worst month was August 2026, at 55 US AQI (11.2 µg/m³), 667th of 2,896 cities on that month's world ranking. Its cleanest was February 2024, at 13 US AQI (2.3 µg/m³). 2025 averaged 30 US AQI (5.4 µg/m³), against 31 US AQI (5.6 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
King City's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| August 2026 | 5511.2 µg/m³ | 667thof 2,896 | – |
| July 2026 | 5310.2 µg/m³ | 1,303rdof 2,784 | – |
| June 2024 | 519.1 µg/m³ | 911thof 2,563 | – |
| June 2026 | 519.1 µg/m³ | 790thof 2,497 | – |
| May 2026 | 498.9 µg/m³ | 1,021stof 2,874 | – |
| September 2023 | 488.6 µg/m³ | 899thof 2,176 | California and Oregon, United States, September 2023 |
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.
King City's worst days
| Day | US AQI | Episode |
|---|---|---|
| 20 Sept 2023 | 10436.7 µg/m³ | California and Oregon, United States, September 2023 |
| 21 Sept 2023 | 8527.2 µg/m³ | California and Oregon, United States, September 2023 |
| 31 Aug 2023 | 7924.1 µg/m³ | – |
| 22 Sept 2023 | 7823.4 µg/m³ | California and Oregon, United States, September 2023 |
| 6 Jun 2024 | 6818.1 µg/m³ | – |
| 23 Sept 2023 | 6717.7 µg/m³ | California and Oregon, United States, September 2023 |
| 3 Aug 2026 | 6717.6 µg/m³ | – |
| 30 Aug 2023 | 6516.5 µg/m³ | – |
| 16 May 2026 | 6516.5 µg/m³ | – |
| 5 Jul 2024 | 6516.4 µg/m³ | – |
Daily means, the highest since 7 May 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, King City, United States, 7 May 2023 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/king-city/history (accessed 12 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.
King City 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).