What is the air quality trend in Cobourg?

Over the past 20 days, Cobourg had an average AQI of 54 based on station measurements. The worst day was 2026-05-23 with AQI 88.

How is Cobourg air quality measured?

Air quality in Cobourg is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Cobourg, Canada

Name: Cobourg Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Cobourg, Canada.

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

349h

PM2.5 Station

349h · 1 station

Temperature GFS model

79pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	66	10–426	35.9 µg/m³	16h	2
2026-05-28	53	14–143	15.7 µg/m³	16h	1
2026-05-27	45	12–159	14.3 µg/m³	14h	1
2026-05-26	66	30–127	19.9 µg/m³	16h	2
2026-05-25	85	33–186	31.4 µg/m³	18h	1
2026-05-24	56	13–152	18.3 µg/m³	12h	2
2026-05-23	88	11–163	32.8 µg/m³	22h	2
2026-05-22	46	12–154	13.7 µg/m³	17h	2
2026-05-21	51	7–129	15.7 µg/m³	17h	2
2026-05-20	78	9–218	34.9 µg/m³	21h	2
2026-05-19	44	9–159	14.6 µg/m³	17h	2
2026-05-18	41	6–99	11.9 µg/m³	17h	1
2026-05-17	22	7–39	5.2 µg/m³	9h	1
2026-05-16	41	6–228	16.8 µg/m³	19h	1
2026-05-15	36	9–65	8.9 µg/m³	21h	2
2026-05-14	76	21–500	52.7 µg/m³	20h	2
2026-05-13	50	9–137	14.6 µg/m³	19h	2
2026-05-12	44	5–91	12.3 µg/m³	19h	2
2026-05-11	54	5–191	20.4 µg/m³	20h	2
2026-05-10	41	10–95	11.2 µg/m³	19h	2

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