SmogRank / United States / Oregon / Grants Pass
Grants Pass, month by month
Grants Pass has a measured daily mean on 1,359 days since 1 January 2023. Its worst month was August 2023, at 123 US AQI (44.5 µg/m³), 20th of 1,980 cities on that month's world ranking. Its cleanest was June 2026, at 14 US AQI (2.5 µg/m³). 2025 averaged 42 US AQI (7.5 µg/m³), against 34 US AQI (6.1 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
Grants Pass's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| August 2023 | 12344.5 µg/m³ | 20thof 1,980 | North-western United States and Canada, August 2023 |
| September 2025 | 6717.5 µg/m³ | 273rdof 3,104 | North-western United States and Canada, August and September 2025 |
| November 2023 | 5913.5 µg/m³ | 202ndof 2,243 | – |
| January 2025 | 5913.2 µg/m³ | 597thof 2,474 | Western United States and Mexico, January and February 2025 |
| November 2025 | 5812.8 µg/m³ | 695thof 2,715 | – |
| January 2026 | 5812.8 µg/m³ | 886thof 2,617 | – |
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.
Grants Pass's worst days
| Day | US AQI | Episode |
|---|---|---|
| 27 Aug 2023 | 289214.0 µg/m³ | North-western United States and Canada, August 2023 |
| 28 Aug 2023 | 286211.0 µg/m³ | North-western United States and Canada, August 2023 |
| 25 Aug 2023 | 250175.0 µg/m³ | North-western United States and Canada, August 2023 |
| 28 Sept 2025 | 229154.0 µg/m³ | – |
| 21 Aug 2023 | 191113.0 µg/m³ | North-western United States and Canada, August 2023 |
| 26 Aug 2023 | 191112.0 µg/m³ | North-western United States and Canada, August 2023 |
| 27 Sept 2025 | 17286.0 µg/m³ | – |
| 24 Aug 2023 | 16777.9 µg/m³ | North-western United States and Canada, August 2023 |
| 31 Aug 2023 | 15663.2 µg/m³ | North-western United States and Canada, August 2023 |
| 16 Sept 2023 | 15662.3 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, Grants Pass, 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/grants-pass/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.
Grants Pass now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 22:07 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).