SmogRank / United States / Oregon / Redmond
Redmond, month by month
Redmond has a measured daily mean on 1,247 days since 1 January 2023. Its worst month was August 2023, at 128 US AQI (46.6 µg/m³), 14th of 1,980 cities on that month's world ranking. Its cleanest was June 2026, at 13 US AQI (2.4 µg/m³). 2025 averaged 26 US AQI (4.7 µg/m³), against 42 US AQI (7.5 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
4 months
| Month | Why |
|---|---|
| Nov 2024 | 20 of 30 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 9 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive, 2 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. |
| Jan 2023 | 13 of 31 days measured; a month needs 22. The others: 7 missing from OpenAQ's archive, 11 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.
Redmond's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| August 2023 | 12846.6 µg/m³ | 14thof 1,980 | North-western United States and Canada, August 2023 |
| August 2026 | 8024.8 µg/m³ | 166thof 2,896 | North-western United States and Canada, 4 to 22 August 2026 North-western United States and Canada, July and August 2026 |
| July 2024 | 6013.9 µg/m³ | 234thof 2,566 | North-western United States and Canada, July 2024 |
| September 2024 | 6013.8 µg/m³ | 203rdof 2,010 | North-western United States and Canada, 4 to 11 September 2024 |
| August 2024 | 5913.3 µg/m³ | 238thof 2,010 | Oregon, Idaho and Utah, United States, August 2024 |
| July 2026 | 5913.3 µg/m³ | 682ndof 2,784 | North-western United States and Canada, July and August 2026 |
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.
Redmond's worst days
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, Redmond, 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/redmond-oregon/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.
Redmond now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 01:07 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).