Crystal Lake AQI History

Hourly air quality data for the past 24 hours in Crystal Lake, Illinois.

24-Hour Summary

Average AQI

Peak AQI

Best AQI

Hourly AQI Data

TimeAQICategoryPM2.5PM10
02:00 am31Good5.66.3
03:00 am17Good3.13.4
04:00 am9Good1.71.8
05:00 am11Good1.92.0
06:00 am17Good3.03.1
07:00 am43Good7.88.4
08:00 am51Moderate9.19.5
09:00 am52Moderate9.710.1
10:00 am52Moderate9.910.3
11:00 am52Moderate9.810.2
12:00 pm51Moderate9.39.7
01:00 pm49Good8.99.3
02:00 pm47Good8.59.0
03:00 pm46Good8.38.7
04:00 pm47Good8.48.8
05:00 pm47Good8.48.8
06:00 pm47Good8.48.7
07:00 pm3Good0.60.6
08:00 pm6Good1.01.1
09:00 pm9Good1.71.7
10:00 pm12Good2.12.2
11:00 pm14Good2.52.6
12:00 am16Good2.82.9
01:00 am16Good2.93.0
02:00 am16Good2.93.0
03:00 am16Good2.83.0
04:00 am16Good2.82.9
05:00 am16Good2.82.9
06:00 am17Good3.13.2
07:00 am14Good2.52.6
08:00 am16Good2.93.0
09:00 am25Good4.54.6
10:00 am35Good6.36.4
11:00 am39Good7.17.3
12:00 pm38Good6.87.1
01:00 pm36Good6.56.9
02:00 pm38Good6.87.2
03:00 pm39Good7.17.5
04:00 pm41Good7.47.7
05:00 pm42Good7.67.9
06:00 pm45Good8.18.4
07:00 pm37Good6.66.8
08:00 pm42Good7.57.7
09:00 pm48Good8.68.7
10:00 pm51Moderate9.39.5
11:00 pm51Moderate9.19.3
12:00 am51Moderate9.19.4
01:00 am52Moderate9.59.8
02:00 am51Moderate9.39.6
03:00 am47Good8.58.9
04:00 am43Good7.78.1
05:00 am39Good7.07.3
06:00 am34Good6.16.3
07:00 am4Good0.80.8
08:00 am2Good0.40.4
09:00 am3Good0.50.5
10:00 am3Good0.60.6
11:00 am4Good0.70.7
12:00 pm4Good0.80.8
01:00 pm5Good0.90.9
02:00 pm6Good1.01.0
03:00 pm6Good1.11.1
04:00 pm7Good1.21.2
05:00 pm8Good1.41.4
06:00 pm9Good1.71.7
07:00 pm24Good4.44.8
08:00 pm21Good3.83.9
09:00 pm18Good3.23.2
10:00 pm17Good3.03.0
11:00 pm16Good2.92.9
12:00 am17Good3.13.1
01:00 am19Good3.53.5
02:00 am22Good3.93.9
03:00 am23Good4.14.1
04:00 am22Good4.04.1
05:00 am22Good3.94.0
06:00 am22Good3.94.1
07:00 am11Good2.02.0
08:00 am11Good1.91.9
09:00 am11Good1.91.9
10:00 am11Good2.02.0
11:00 am12Good2.12.1
12:00 pm13Good2.32.3
01:00 pm14Good2.62.6
02:00 pm16Good2.82.8
03:00 pm16Good2.92.9
04:00 pm17Good3.13.1
05:00 pm17Good3.03.0
06:00 pm16Good2.82.8
07:00 pm1Good0.10.1
08:00 pm4Good0.70.7
09:00 pm7Good1.21.2
10:00 pm10Good1.81.9
11:00 pm14Good2.62.6
12:00 am19Good3.43.4
01:00 am23Good4.24.3
02:00 am25Good4.54.6
03:00 am30Good5.45.6
04:00 am34Good6.26.4
05:00 am38Good6.87.0
06:00 am42Good7.57.8
07:00 am54Moderate10.711.6
08:00 am51Moderate9.210.4
09:00 am36Good6.58.0
10:00 am32Good5.87.5
11:00 am34Good6.27.9
12:00 pm39Good7.08.6
01:00 pm42Good7.58.8
02:00 pm42Good7.68.7
03:00 pm41Good7.48.2
04:00 pm39Good7.17.7
05:00 pm39Good7.07.4
06:00 pm39Good7.17.3
07:00 pm22Good4.04.0
08:00 pm23Good4.14.1
09:00 pm24Good4.34.3
10:00 pm21Good3.73.7
11:00 pm16Good2.82.8
12:00 am12Good2.12.1
01:00 am9Good1.71.8
02:00 am10Good1.81.8
03:00 am11Good2.02.0
04:00 am12Good2.12.2
05:00 am12Good2.22.3
06:00 am12Good2.22.2
07:00 am6Good1.01.1
08:00 am5Good0.90.9
09:00 am5Good0.90.9
10:00 am6Good1.11.1
11:00 am7Good1.31.3
12:00 pm9Good1.61.6
01:00 pm11Good1.91.9
02:00 pm11Good2.02.0
03:00 pm11Good2.02.1
04:00 pm11Good2.02.0
05:00 pm11Good2.02.1
06:00 pm12Good2.12.2
07:00 pm52Moderate9.49.6
08:00 pm38Good6.97.1
09:00 pm46Good8.28.4
10:00 pm50Good9.09.1
11:00 pm49Good8.88.9
12:00 am45Good8.18.2
01:00 am43Good7.77.7
02:00 am42Good7.67.6
03:00 am44Good7.97.9
04:00 am46Good8.28.2
05:00 am45Good8.18.2
06:00 am43Good7.87.8
07:00 am51Moderate9.39.4
08:00 am51Moderate9.29.3
09:00 am54Moderate10.911.3
10:00 am57Moderate12.413.6
11:00 am57Moderate12.514.1
12:00 pm56Moderate11.613.5
01:00 pm55Moderate11.413.2
02:00 pm55Moderate11.513.4
03:00 pm56Moderate11.813.8
04:00 pm56Moderate12.014.0
05:00 pm56Moderate11.914.0
06:00 pm56Moderate11.613.6
07:00 pm55Moderate11.113.0
08:00 pm55Moderate11.212.9
09:00 pm56Moderate11.813.3
10:00 pm57Moderate12.113.6
11:00 pm57Moderate12.213.6
12:00 am56Moderate11.713.1
01:00 am53Moderate10.411.8
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