St. Catharines AQI History

Hourly air quality data for the past 24 hours in St. Catharines, Ontario.

24-Hour Summary

Average AQI

Peak AQI

Best AQI

Hourly AQI Data

TimeAQICategoryPM2.5PM10
02:00 am16Good2.82.9
03:00 am17Good3.13.1
04:00 am20Good3.63.7
05:00 am26Good4.64.7
06:00 am34Good6.16.3
07:00 am49Good8.89.1
08:00 am10Good1.81.8
09:00 am20Good3.63.6
10:00 am31Good5.65.7
11:00 am38Good6.97.0
12:00 pm41Good7.47.5
01:00 pm43Good7.77.9
02:00 pm47Good8.48.8
03:00 pm49Good8.99.3
04:00 pm49Good8.89.1
05:00 pm44Good8.08.3
06:00 pm41Good7.37.5
07:00 pm38Good6.86.9
08:00 pm19Good3.43.4
09:00 pm25Good4.54.6
10:00 pm33Good5.95.9
11:00 pm36Good6.46.4
12:00 am36Good6.46.4
01:00 am36Good6.46.4
02:00 am36Good6.56.5
03:00 am38Good6.86.8
04:00 am38Good6.96.9
05:00 am40Good7.27.2
06:00 am42Good7.67.6
07:00 am41Good7.37.3
08:00 am52Moderate9.79.7
09:00 am51Moderate9.19.1
10:00 am47Good8.58.5
11:00 am43Good7.77.7
12:00 pm40Good7.27.2
01:00 pm37Good6.66.6
02:00 pm33Good6.06.0
03:00 pm33Good6.06.1
04:00 pm35Good6.36.4
05:00 pm31Good5.55.6
06:00 pm28Good5.05.0
07:00 pm25Good4.54.5
08:00 pm24Good4.34.3
09:00 pm31Good5.55.5
10:00 pm28Good5.15.1
11:00 pm18Good3.33.3
12:00 am23Good4.24.4
01:00 am38Good6.97.5
02:00 am44Good8.08.7
03:00 am41Good7.37.9
04:00 am37Good6.77.2
05:00 am38Good6.97.4
06:00 am43Good7.78.3
07:00 am48Good8.79.4
08:00 am34Good6.26.8
09:00 am29Good5.25.5
10:00 am23Good4.24.4
11:00 am21Good3.73.8
12:00 pm20Good3.63.7
01:00 pm21Good3.83.9
02:00 pm23Good4.24.4
03:00 pm26Good4.64.8
04:00 pm29Good5.25.5
05:00 pm34Good6.26.5
06:00 pm39Good7.17.5
07:00 pm43Good7.88.2
08:00 pm58Moderate12.913.5
09:00 pm62Moderate15.015.7
10:00 pm65Moderate16.617.2
11:00 pm64Moderate16.116.6
12:00 am59Moderate13.313.8
01:00 am54Moderate10.711.1
02:00 am52Moderate9.59.7
03:00 am49Good8.99.1
04:00 am47Good8.48.5
05:00 am43Good7.87.9
06:00 am40Good7.27.3
07:00 am34Good6.26.3
08:00 am41Good7.37.6
09:00 am40Good7.27.4
10:00 am43Good7.77.9
11:00 am46Good8.38.4
12:00 pm52Moderate9.59.8
01:00 pm53Moderate10.410.8
02:00 pm53Moderate10.210.6
03:00 pm51Moderate9.19.5
04:00 pm38Good6.97.3
05:00 pm28Good5.15.4
06:00 pm21Good3.84.0
07:00 pm18Good3.33.4
08:00 pm22Good4.04.1
09:00 pm27Good4.84.8
10:00 pm31Good5.55.5
11:00 pm33Good6.06.0
12:00 am37Good6.76.7
01:00 am42Good7.57.5
02:00 am45Good8.18.1
03:00 am47Good8.48.4
04:00 am46Good8.38.4
05:00 am41Good7.47.7
06:00 am36Good6.46.7
07:00 am31Good5.66.0
08:00 am35Good6.36.8
09:00 am31Good5.66.1
10:00 am32Good5.76.1
11:00 am34Good6.16.5
12:00 pm36Good6.56.9
01:00 pm37Good6.77.1
02:00 pm39Good7.17.6
03:00 pm43Good7.88.3
04:00 pm46Good8.38.8
05:00 pm47Good8.59.1
06:00 pm47Good8.48.9
07:00 pm46Good8.38.7
08:00 pm51Moderate9.39.8
09:00 pm51Moderate9.19.6
10:00 pm51Moderate9.29.5
11:00 pm53Moderate10.010.3
12:00 am56Moderate12.012.4
01:00 am63Moderate15.515.8
02:00 am69Moderate18.518.9
03:00 am72Moderate20.520.9
04:00 am74Moderate21.521.9
05:00 am75Moderate22.122.4
06:00 am77Moderate22.823.1
07:00 am76Moderate22.522.8
08:00 am60Moderate13.814.0
09:00 am59Moderate13.413.6
10:00 am58Moderate13.113.2
11:00 am61Moderate14.514.6
12:00 pm65Moderate16.616.8
01:00 pm70Moderate19.219.6
02:00 pm75Moderate21.822.4
03:00 pm77Moderate23.123.9
04:00 pm77Moderate23.123.9
05:00 pm72Moderate20.421.2
06:00 pm63Moderate15.416.2
07:00 pm51Moderate9.39.8
08:00 pm57Moderate12.514.1
09:00 pm58Moderate13.014.3
10:00 pm59Moderate13.514.4
11:00 pm59Moderate13.514.1
12:00 am59Moderate13.613.9
01:00 am59Moderate13.613.9
02:00 am60Moderate13.814.0
03:00 am60Moderate13.914.0
04:00 am59Moderate13.513.6
05:00 am57Moderate12.512.6
06:00 am55Moderate11.411.4
07:00 am53Moderate10.010.1
08:00 am46Good8.28.2
09:00 am48Good8.78.8
10:00 am53Moderate10.010.0
11:00 am55Moderate11.411.4
12:00 pm58Moderate12.712.7
01:00 pm59Moderate13.313.3
02:00 pm59Moderate13.213.2
03:00 pm58Moderate12.712.7
04:00 pm56Moderate11.611.6
05:00 pm54Moderate10.510.6
06:00 pm51Moderate9.39.3
07:00 pm42Good7.67.6
08:00 pm36Good6.56.5
09:00 pm32Good5.85.8
10:00 pm34Good6.26.2
11:00 pm38Good6.86.9
12:00 am40Good7.27.3
01:00 am41Good7.47.4
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