SmogRank / United States / New Jersey / Bayonne
Bayonne, month by month
Bayonne has a measured daily mean on 1,191 days since 17 January 2023. Its worst month was June 2023, at 63 US AQI (15.8 µg/m³), 362nd of 1,603 cities on that month's world ranking. Its cleanest was May 2025, at 17 US AQI (3.1 µg/m³). 2025 averaged 34 US AQI (6.2 µg/m³), against 29 US AQI (5.3 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
8 months
| Month | Why |
|---|---|
| Oct 2026 | 7 of 11 days measured; a month needs 8. The others: 2 with no readings from the monitor, 2 with readings for part of the day (a day needs 18 hours). |
| Nov 2025 | 11 of 30 days measured; a month needs 21. The others: 19 with under 18 hours of readings or readings that failed our checks. |
| Jul 2025 | 13 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks. |
| Jun 2025 | 16 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks. |
| Aug 2023 | 18 of 31 days measured; a month needs 22. The others: 13 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 | 3 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive. |
| Jan 2023 | 11 of 31 days measured; a month needs 22. The others: 1 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.
Bayonne's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| June 2023 | 6315.8 µg/m³ | 362ndof 1,603 | Eastern United States and Canada, June and July 2023 Eastern United States and Canada, May and June 2023 |
| July 2026 | 5913.6 µg/m³ | 644thof 2,784 | Northern United States and Canada, July 2026 |
| July 2023 | 5712.1 µg/m³ | 391stof 1,432 | North-eastern United States, 4 to 5 July 2023 Eastern United States and Canada, June and July 2023 |
| January 2026 | 519.3 µg/m³ | 1,190thof 2,617 | – |
| February 2026 | 468.3 µg/m³ | 1,883rdof 2,866 | – |
| December 2023 | 448.0 µg/m³ | 1,260thof 2,247 | – |
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.
Bayonne's worst days
| Day | US AQI | Episode |
|---|---|---|
| 7 Jun 2023 | 191113.0 µg/m³ | Eastern United States and Canada, May and June 2023 |
| 16 Jul 2026 | 17386.9 µg/m³ | Northern United States and Canada, July 2026 |
| 4 Jul 2023 | 16474.3 µg/m³ | North-eastern United States, 4 to 5 July 2023 |
| 8 Jun 2023 | 15561.7 µg/m³ | Eastern United States and Canada, May and June 2023 |
| 5 Jul 2023 | 15256.9 µg/m³ | North-eastern United States, 4 to 5 July 2023 |
| 6 Jun 2023 | 15055.3 µg/m³ | Eastern United States and Canada, May and June 2023 |
| 18 Jul 2026 | 13750.2 µg/m³ | Northern United States and Canada, July 2026 |
| 17 Jul 2026 | 13549.5 µg/m³ | Northern United States and Canada, July 2026 |
| 30 Jun 2023 | 13549.3 µg/m³ | Eastern United States and Canada, June and July 2023 |
| 27 Sept 2026 | 10737.9 µg/m³ | – |
Daily means, the highest since 17 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, Bayonne, United States, 17 Jan 2023 – 10 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/bayonne/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.
Bayonne 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).