What is the air quality trend in Cobourg?

Over the past 8 days, Cobourg had an average AQI of 49 based on station measurements. The worst day was 2026-09-04 with AQI 64.

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

86h

PM2.5 Station

86h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-09-05	56	17–154	17.7 µg/m³	8h	1
2026-09-04	64	10–175	23.0 µg/m³	11h	1
2026-09-03	50	13–233	22.7 µg/m³	13h	1
2026-09-02	49	5–154	14.3 µg/m³	15h	1
2026-09-01	46	15–137	13.4 µg/m³	16h	1
2026-08-31	43	6–162	13.7 µg/m³	11h	1
2026-08-30	41	13–117	11.5 µg/m³	8h	1
2026-08-29	44	30–50	10.4 µg/m³	4h	2

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