What is the air quality trend in Saint-Hyacinthe?

Over the past 8 days, Saint-Hyacinthe had an average AQI of 42 based on station measurements. The worst day was 2026-05-26 with AQI 60.

How is Saint-Hyacinthe air quality measured?

Air quality in Saint-Hyacinthe 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 Saint-Hyacinthe, Canada

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

Historical PM2.5 and AQI trend from monitoring stations near Saint-Hyacinthe, Canada.

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

169h

PM2.5 Station

169h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-30	32	7–71	8.5 µg/m³	1.2	9h	11
2026-05-29	43	17–67	11.0 µg/m³	1.6	24h	11
2026-05-28	29	11–63	7.2 µg/m³	1.1	24h	9
2026-05-27	40	12–145	11.4 µg/m³	1.8	24h	11
2026-05-26	60	27–162	18.6 µg/m³	4.2	24h	11
2026-05-25	43	6–174	13.6 µg/m³	2.6	24h	10
2026-05-24	52	19–90	14.7 µg/m³	3.3	24h	10
2026-05-23	43	16–144	13.0 µg/m³	2.2	16h	9

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