SmogRank / United States / Washington / Port Angeles
Port Angeles, month by month
Port Angeles has a measured daily mean on 1,228 days since 1 January 2023. Its worst month was November 2023, at 57 US AQI (12.5 µg/m³), 261st of 2,243 cities on that month's world ranking. Its cleanest was June 2024, at 22 US AQI (3.9 µg/m³). 2025 averaged 34 US AQI (6.1 µg/m³), against 33 US AQI (6.0 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
5 months
| Month | Why |
|---|---|
| Jun 2026 | 19 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks. |
| Apr 2026 | 9 of 30 days measured; a month needs 21. The others: 21 with under 18 hours of readings or readings that failed our checks. |
| Mar 2026 | 7 of 31 days measured; a month needs 22. The others: 24 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive. |
| 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. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Port Angeles's worst months
| Month | US AQI | World rank |
|---|---|---|
| November 2023 | 5712.5 µg/m³ | 261stof 2,243 |
| January 2025 | 5310.4 µg/m³ | 927thof 2,474 |
| December 2024 | 529.8 µg/m³ | 908thof 2,616 |
| January 2026 | 529.5 µg/m³ | 1,157thof 2,617 |
| January 2023 | 519.1 µg/m³ | 565thof 1,261 |
| November 2024 | 519.1 µg/m³ | 1,051stof 2,624 |
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.
Port Angeles's worst days
| Day | US AQI | Episode |
|---|---|---|
| 7 Nov 2023 | 10738.1 µg/m³ | – |
| 20 Aug 2023 | 9733.9 µg/m³ | North-western United States and Canada, August 2023 |
| 22 Sept 2023 | 8828.7 µg/m³ | – |
| 26 Aug 2023 | 8628.0 µg/m³ | North-western United States and Canada, August 2023 |
| 8 Nov 2023 | 8024.5 µg/m³ | – |
| 25 Aug 2023 | 7722.9 µg/m³ | North-western United States and Canada, August 2023 |
| 5 Aug 2026 | 7019.2 µg/m³ | – |
| 13 May 2023 | 6919.0 µg/m³ | – |
| 12 Dec 2024 | 6918.9 µg/m³ | – |
| 5 Jul 2023 | 6717.9 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, Port Angeles, 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/port-angeles/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.
Port Angeles now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 23:07 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).