SmogRank / United States / Oregon / Roseburg
Roseburg, month by month
Roseburg has a measured daily mean on 755 days since 16 January 2023. Its worst month was January 2026, at 48 US AQI (8.7 µg/m³), 1,313th of 2,617 cities on that month's world ranking. Its cleanest was June 2026, at 16 US AQI (2.9 µg/m³).
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
20 months
| Month | Why |
|---|---|
| May 2026 | 16 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks. |
| Feb 2025 | 11 of 28 days measured; a month needs 20. The others: 17 with under 18 hours of readings or readings that failed our checks. |
| Jun 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| May 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Apr 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Mar 2024 | No day measured. The others: 1 missing from OpenAQ's archive, 30 with under 18 hours of readings or readings that failed our checks. |
| Feb 2024 | No day measured. The others: 1 missing from OpenAQ's archive, 28 with under 18 hours of readings or readings that failed our checks. |
| Jan 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Dec 2023 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Nov 2023 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Oct 2023 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Sep 2023 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Aug 2023 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Jul 2023 | No day measured. The others: 1 missing from OpenAQ's archive, 30 with under 18 hours of readings or readings that failed our checks. |
| Jun 2023 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| May 2023 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Apr 2023 | No day measured. The others: 3 missing from OpenAQ's archive, 27 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | No day measured. The others: 20 missing from OpenAQ's archive, 11 with under 18 hours of readings or readings that failed our checks. |
| Feb 2023 | No day measured. The others: 25 missing from OpenAQ's archive, 3 with under 18 hours of readings or readings that failed our checks. |
| Jan 2023 | 1 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 14 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.
Roseburg's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| January 2026 | 488.7 µg/m³ | 1,313thof 2,617 | – |
| November 2025 | 386.8 µg/m³ | 1,919thof 2,715 | – |
| August 2026 | 386.8 µg/m³ | 2,174thof 2,896 | North-western United States and Canada, 4 to 22 August 2026 |
| September 2025 | 366.4 µg/m³ | 1,933rdof 3,104 | – |
| December 2025 | 346.1 µg/m³ | 2,428thof 3,006 | – |
| February 2026 | 315.5 µg/m³ | 2,522ndof 2,866 | – |
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.
Roseburg's worst days
| Day | US AQI | Episode |
|---|---|---|
| 6 Aug 2026 | 9030.3 µg/m³ | North-western United States and Canada, 4 to 22 August 2026 |
| 5 Aug 2026 | 8829.0 µg/m³ | North-western United States and Canada, 4 to 22 August 2026 |
| 4 Aug 2026 | 7622.4 µg/m³ | North-western United States and Canada, 4 to 22 August 2026 |
| 7 Aug 2026 | 7521.8 µg/m³ | North-western United States and Canada, 4 to 22 August 2026 |
| 1 Aug 2024 | 6918.6 µg/m³ | – |
| 28 Sept 2025 | 6717.8 µg/m³ | – |
| 31 Jul 2024 | 6315.5 µg/m³ | – |
| 29 Sept 2025 | 5913.5 µg/m³ | – |
| 27 Jan 2026 | 5913.5 µg/m³ | – |
| 4 Sept 2025 | 5913.4 µg/m³ | – |
Daily means, the highest since 16 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, Roseburg, United States, 16 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/roseburg/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.
Roseburg 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).