SmogRank / United States / California / Agoura
Agoura, month by month
Agoura has a measured daily mean on 1,105 days since 1 January 2023. Its worst month was December 2024, at 57 US AQI (12.4 µg/m³), 635th of 2,616 cities on that month's world ranking. Its cleanest was January 2023, at 27 US AQI (4.8 µg/m³). 2025 averaged 49 US AQI (8.9 µg/m³), against 51 US AQI (9.2 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
10 months
| Month | Why |
|---|---|
| Aug 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 2026 | 11 of 31 days measured; a month needs 22. The others: 20 with under 18 hours of readings or readings that failed our checks. |
| Jun 2026 | 8 of 30 days measured; a month needs 21. The others: 22 with under 18 hours of readings or readings that failed our checks. |
| May 2026 | 12 of 31 days measured; a month needs 22. The others: 19 with under 18 hours of readings or readings that failed our checks. |
| Apr 2026 | 10 of 30 days measured; a month needs 21. The others: 20 with under 18 hours of readings or readings that failed our checks. |
| Jun 2025 | 14 of 30 days measured; a month needs 21. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| May 2025 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Jun 2023 | 17 of 30 days measured; a month needs 21. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 19 missing from OpenAQ's archive, 1 with under 18 hours of readings or readings that failed our checks. |
| Feb 2023 | 1 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. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Agoura's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| December 2024 | 5712.4 µg/m³ | 635thof 2,616 | California, United States, December 2024 California and Oregon, United States, December 2024 |
| August 2025 | 5611.9 µg/m³ | 789thof 2,901 | – |
| September 2023 | 5611.6 µg/m³ | 368thof 2,176 | – |
| July 2024 | 5511.3 µg/m³ | 520thof 2,566 | – |
| September 2024 | 5511.0 µg/m³ | 344thof 2,010 | – |
| October 2024 | 5511.0 µg/m³ | 448thof 2,020 | – |
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.
Agoura's worst days
| Day | US AQI | Episode |
|---|---|---|
| 4 Dec 2024 | 8929.6 µg/m³ | California and Oregon, United States, December 2024 |
| 20 Dec 2025 | 8929.3 µg/m³ | Western United States and Mexico, December 2025 |
| 5 Dec 2024 | 8627.7 µg/m³ | California and Oregon, United States, December 2024 |
| 23 Dec 2024 | 8426.8 µg/m³ | California, United States, December 2024 |
| 21 Dec 2025 | 8326.1 µg/m³ | Western United States and Mexico, December 2025 |
| 23 Sept 2023 | 7823.6 µg/m³ | – |
| 24 Sept 2023 | 7622.6 µg/m³ | – |
| 18 Jan 2024 | 7622.3 µg/m³ | – |
| 22 Sept 2023 | 7321.1 µg/m³ | – |
| 3 Nov 2025 | 7320.9 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, Agoura, United States, 1 Jan 2023 – 11 Oct 2026. Monitor data from Clarity and AirGradient via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/us/agoura/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.
Agoura now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 23:07 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).