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Air Quality History for St. Catharines, Canada

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

28
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

476h

PM2.5 Station

476h · 4 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-05-30 36 19–69 9.5 µg/m³ 10h 8
2026-05-29 42 14–187 14.5 µg/m³ 24h 8
2026-05-28 29 10–66 7.1 µg/m³ 24h 8
2026-05-27 45 18–176 14.2 µg/m³ 24h 8
2026-05-26 28 14–50 6.7 µg/m³ 24h 7
2026-05-25 42 14–160 12.2 µg/m³ 24h 8
2026-05-24 38 14–72 9.9 µg/m³ 24h 8
2026-05-23 49 15–176 15.6 µg/m³ 24h 8
2026-05-22 30 13–71 7.5 µg/m³ 24h 8
2026-05-21 54 15–151 15.8 µg/m³ 24h 9
2026-05-20 53 15–192 18.5 µg/m³ 24h 9
2026-05-19 42 18–76 10.7 µg/m³ 24h 8
2026-05-18 35 14–57 8.4 µg/m³ 24h 7
2026-05-17 34 12–71 8.4 µg/m³ 23h 6
2026-05-16 43 15–110 11.7 µg/m³ 22h 8
2026-05-15 46 11–118 13.0 µg/m³ 24h 10
2026-05-14 44 19–84 11.5 µg/m³ 24h 9
2026-05-13 38 21–66 9.5 µg/m³ 24h 10
2026-05-12 34 20–82 8.6 µg/m³ 24h 9
2026-05-11 45 12–93 12.2 µg/m³ 24h 10
2026-05-10 39 15–62 9.8 µg/m³ 13h 12
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