SmogRank / United States / Arizona / Yuma
Yuma, month by month
Yuma has a measured daily mean on 1,321 days since 1 January 2023. Its worst month was October 2024, at 57 US AQI (12.4 µg/m³), 363rd of 2,020 cities on that month's world ranking. Its cleanest was March 2023, at 29 US AQI (5.2 µg/m³). 2025 averaged 44 US AQI (7.9 µg/m³), against 44 US AQI (7.9 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
1 month
| Month | Why |
|---|---|
| Aug 2023 | 18 of 31 days measured; a month needs 22. The others: 13 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.
Yuma's worst months
| Month | US AQI | World rank |
|---|---|---|
| October 2024 | 5712.4 µg/m³ | 363rdof 2,020 |
| July 2023 | 5511.0 µg/m³ | 538thof 1,432 |
| October 2023 | 5410.6 µg/m³ | 285thof 2,012 |
| November 2023 | 529.8 µg/m³ | 668thof 2,243 |
| October 2025 | 529.7 µg/m³ | 592ndof 2,614 |
| September 2024 | 529.6 µg/m³ | 504thof 2,010 |
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.
Yuma's worst days
| Day | US AQI |
|---|---|
| 1 Sept 2023 | 15460.3 µg/m³ |
| 23 Jul 2023 | 15459.8 µg/m³ |
| 10 Jul 2026 | 15358.1 µg/m³ |
| 20 Aug 2023 | 10637.6 µg/m³ |
| 22 Feb 2023 | 10336.3 µg/m³ |
| 3 Apr 2023 | 10035.3 µg/m³ |
| 11 Jul 2026 | 10035.2 µg/m³ |
| 4 Aug 2026 | 8929.3 µg/m³ |
| 8 Jan 2025 | 8829.0 µg/m³ |
| 30 Sept 2023 | 8728.5 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, Yuma, 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/yuma/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.
Yuma now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 18:07 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).