Winchester AQI History

Hourly air quality data for the past 24 hours in Winchester, Massachusetts.

24-Hour Summary

Average AQI

Peak AQI

Best AQI

Hourly AQI Data

TimeAQICategoryPM2.5PM10
03:00 am51Moderate9.39.5
04:00 am52Moderate9.59.7
05:00 am52Moderate9.810.1
06:00 am53Moderate10.310.7
07:00 am55Moderate11.311.7
08:00 am53Moderate10.210.5
09:00 am52Moderate9.49.9
10:00 am44Good8.08.6
11:00 am39Good7.07.6
12:00 pm37Good6.77.3
01:00 pm36Good6.57.1
02:00 pm36Good6.57.2
03:00 pm40Good7.27.9
04:00 pm39Good7.17.7
05:00 pm39Good7.07.6
06:00 pm34Good6.16.5
07:00 pm27Good4.95.2
08:00 pm61Moderate14.315.0
09:00 pm61Moderate14.314.8
10:00 pm63Moderate15.515.9
11:00 pm66Moderate16.917.4
12:00 am68Moderate18.218.7
01:00 am70Moderate19.119.7
02:00 am71Moderate20.020.7
03:00 am73Moderate20.921.6
04:00 am74Moderate21.422.2
05:00 am74Moderate21.722.5
06:00 am74Moderate21.722.5
07:00 am74Moderate21.622.5
08:00 am63Moderate15.516.2
09:00 am52Moderate9.511.1
10:00 am52Moderate9.914.2
11:00 am48Good8.712.9
12:00 pm39Good7.110.5
01:00 pm34Good6.19.0
02:00 pm31Good5.57.9
03:00 pm27Good4.87.0
04:00 pm26Good4.76.9
05:00 pm33Good6.08.8
06:00 pm33Good6.08.3
07:00 pm43Good7.79.9
08:00 pm71Moderate19.626.3
09:00 pm67Moderate17.722.5
10:00 pm63Moderate15.719.4
11:00 pm64Moderate16.119.4
12:00 am63Moderate15.619.2
01:00 am59Moderate13.616.6
02:00 am55Moderate11.213.2
03:00 am53Moderate10.211.5
04:00 am53Moderate10.010.6
05:00 am49Good8.89.1
06:00 am47Good8.58.8
07:00 am39Good7.17.5
08:00 am39Good7.18.9
09:00 am26Good4.65.8
10:00 am17Good3.13.9
11:00 am12Good2.22.6
12:00 pm9Good1.62.0
01:00 pm9Good1.71.9
02:00 pm10Good1.82.0
03:00 pm11Good2.02.4
04:00 pm15Good2.73.1
05:00 pm20Good3.64.6
06:00 pm25Good4.55.8
07:00 pm26Good4.76.0
08:00 pm53Moderate10.012.6
09:00 pm55Moderate11.313.8
10:00 pm58Moderate12.915.0
11:00 pm61Moderate14.415.9
12:00 am63Moderate15.717.2
01:00 am64Moderate16.017.5
02:00 am64Moderate15.917.5
03:00 am63Moderate15.316.9
04:00 am61Moderate14.315.8
05:00 am58Moderate13.114.4
06:00 am55Moderate11.412.5
07:00 am52Moderate9.810.6
08:00 am22Good3.94.1
09:00 am23Good4.24.5
10:00 am24Good4.44.9
11:00 am23Good4.14.6
12:00 pm22Good4.04.6
01:00 pm24Good4.35.5
02:00 pm33Good5.97.7
03:00 pm47Good8.410.7
04:00 pm52Moderate9.911.8
05:00 pm55Moderate11.113.0
06:00 pm57Moderate12.414.1
07:00 pm58Moderate13.014.5
08:00 pm75Moderate22.224.9
09:00 pm74Moderate21.423.3
10:00 pm73Moderate21.122.9
11:00 pm72Moderate20.622.0
12:00 am71Moderate20.121.1
01:00 am77Moderate23.024.0
02:00 am76Moderate22.623.4
03:00 am75Moderate22.222.9
04:00 am72Moderate20.321.0
05:00 am67Moderate17.918.8
06:00 am62Moderate14.917.6
07:00 am59Moderate13.317.5
08:00 am36Good6.49.0
09:00 am37Good6.69.7
10:00 am41Good7.310.7
11:00 am41Good7.310.7
12:00 pm39Good7.110.2
01:00 pm39Good7.010.0
02:00 pm39Good7.010.0
03:00 pm37Good6.79.4
04:00 pm36Good6.48.9
05:00 pm35Good6.38.7
06:00 pm35Good6.38.5
07:00 pm38Good6.88.9
08:00 pm69Moderate19.024.0
09:00 pm71Moderate20.124.7
10:00 pm73Moderate20.825.2
11:00 pm74Moderate21.425.7
12:00 am74Moderate21.525.6
01:00 am71Moderate19.823.5
02:00 am69Moderate18.722.6
03:00 am66Moderate17.321.4
04:00 am64Moderate16.220.3
05:00 am63Moderate15.319.4
06:00 am61Moderate14.718.6
07:00 am60Moderate13.917.3
08:00 am61Moderate14.217.8
09:00 am64Moderate15.920.4
10:00 am66Moderate17.222.2
11:00 am68Moderate18.023.0
12:00 pm70Moderate19.324.4
01:00 pm68Moderate18.423.7
02:00 pm66Moderate16.922.1
03:00 pm63Moderate15.319.9
04:00 pm60Moderate13.717.5
05:00 pm56Moderate11.914.9
06:00 pm58Moderate12.915.2
07:00 pm61Moderate14.316.1
08:00 pm78Moderate23.527.2
09:00 pm79Moderate24.327.7
10:00 pm77Moderate23.125.9
11:00 pm74Moderate21.223.2
12:00 am69Moderate18.920.1
01:00 am65Moderate16.617.5
02:00 am62Moderate15.015.7
03:00 am61Moderate14.415.0
04:00 am61Moderate14.415.0
05:00 am62Moderate14.915.5
06:00 am63Moderate15.716.4
07:00 am64Moderate16.116.8
08:00 am29Good5.35.4
09:00 am27Good4.84.9
10:00 am17Good3.13.2
11:00 am15Good2.72.7
12:00 pm14Good2.62.7
01:00 pm14Good2.52.6
02:00 pm13Good2.42.4
03:00 pm13Good2.42.4
04:00 pm14Good2.52.5
05:00 pm14Good2.62.6
06:00 pm16Good2.82.8
07:00 pm26Good4.74.8
08:00 pm37Good6.66.9
09:00 pm38Good6.97.5
10:00 pm43Good7.78.6
11:00 pm44Good8.09.1
12:00 am39Good7.18.4
01:00 am35Good6.37.7
02:00 am32Good5.87.1
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