SmogRank / United States / Arizona / West Sedona

West Sedona, month by month

West Sedona has a measured daily mean on 450 days since 8 April 2025. Its worst month was June 2025, at 36 US AQI (6.5 µg/m³), 2,094th of 2,508 cities on that month's world ranking. Its cleanest was May 2026, at 17 US AQI (3.0 µg/m³).

Every month since 2025

202641 so far199 days measured2,119th of 2,791 in the world

Jan22#2,493 Feb25#2,658 Mar28#2,679 Apr27#2,552 May17#2,812 Jun24#2,245Jul13 daysAug8 daysSep6 daysOct2 days

2025too few days for a mean (a year needs 256)251 days measured

JanFebMarApr30#2,443 May35#1,828 Jun36#2,094 Jul34#2,236 Aug36#2,366 Sep30#2,391 Oct27#2,088 Nov29#2,349 Dec20#2,898

Each square is a month's mean PM2.5 in US AQI from West Sedona's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with West Sedona marked; each year, the year's.

Good0–50

Moderate51–100

Sensitive groups101–150

Unhealthy151–200

Very unhealthy201–300

Hazardous301+

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

4 months

Month	Why
Oct 2026	2 of 11 days measured; a month needs 8. The others: 1 with no readings from the monitor, 8 with readings for part of the day (a day needs 18 hours).
Sep 2026	6 of 30 days measured; a month needs 21. The others: 24 with readings for part of the day (a day needs 18 hours).
Aug 2026	8 of 31 days measured; a month needs 22. The others: 23 with readings for part of the day (a day needs 18 hours).
Jul 2026	13 of 31 days measured; a month needs 22. The others: 9 with no readings from the monitor, 8 with readings for part of the day (a day needs 18 hours), 1 with readings left out by our checks.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

West Sedona's worst months

Month	US AQI	Days measured	World rank
June 2025	366.5 µg/m³	30 of 30	2,094thof 2,508
August 2025	366.5 µg/m³	28 of 31	2,366thof 2,901
May 2025	356.3 µg/m³	31 of 31	1,828thof 2,826
July 2025	346.2 µg/m³	30 of 31	2,236thof 2,889
April 2025	305.4 µg/m³	23 of 30	2,443rdof 2,951
September 2025	305.4 µg/m³	28 of 30	2,391stof 3,104

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.

West Sedona's worst days

Day	US AQI
2 Jul 2026	18198.9 µg/m³
3 Jul 2026	17793.2 µg/m³
1 Jul 2026	16981.6 µg/m³
4 Jul 2026	15055.2 µg/m³
4 Aug 2026	14151.9 µg/m³
7 Jul 2026	9935.0 µg/m³
8 Jul 2026	9834.1 µg/m³
5 Jul 2026	9231.2 µg/m³
6 Jul 2026	9030.3 µg/m³
13 Nov 2025	8024.5 µg/m³

Daily means, the highest since 8 Apr 2025; 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, West Sedona, United States, 8 Apr 2025 – 10 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/west-sedona/history (accessed 12 Oct 2026).

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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.

West Sedona 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).