Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Friday Forecast:


Ozone

48 AQI
Max 8-hr Avg: 52 ppb

PM10

52 AQI
24-hr Avg: 58 µg/m3

PM2.5

28 AQI
24-hr Avg: 6.7 µg/m3

Saturday Forecast:


Ozone

48 AQI
Max 8-hr Avg: 52 ppb

PM10

44 AQI
24-hr Avg: 48 µg/m3

PM2.5

33 AQI
24-hr Avg: 8.0 µg/m3

Sunday Forecast:


Ozone

44 AQI
Max 8-hr Avg: 48 ppb

PM10

39 AQI
24-hr Avg: 42 µg/m3

PM2.5

29 AQI
24-hr Avg: 7.0 µg/m3

Monday Forecast:


Ozone

49 AQI
Max 8-hr Avg: 53 ppb

PM10

58 AQI
24-hr Avg: 70 µg/m3

PM2.5

41 AQI
24-hr Avg: 9.9 µg/m3

Tuesday Forecast:


Ozone

51 AQI
Max 8-hr Avg: 55 ppb

PM10

63 AQI
24-hr Avg: 79 µg/m3

PM2.5

45 AQI
24-hr Avg: 10.8 µg/m3

Air Quality By Pollutant:

Pollutant
Friday
10/18/2019
Saturday
10/19/2019
Sunday
10/20/2019
Monday
10/21/2019
Tuesday
10/22/2019
O3
48
48
44
49
51
PM10
52
44
39
58
63
PM2.5
28
33
29
41
45
Pollutant
FRI
SAT
SUN
MON
TUE
O3
48
48
44
49
51
PM10
52
44
39
58
63
PM2.5
28
33
29
41
45
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

Thursday’s low pressure trough can still be seen making its way over Arizona. That system should be out the door, so to speak, and into the southern Great Plains by the weekend.

Air quality fared well as winds got kicked up yesterday afternoon. The Salt River drainage did observe higher particulate readings as captured by the West 43rd PM10 monitor. That was the lone monitoring site that reached the Moderate AQI category for any of the major pollutants. The rest of the Valley was good across the board. Unsettled weather in terms of breeziness continues today. More apparent will be the undercut of peak temperatures by about 10 degrees (Thursday’s official high temperature at Sky Harbor was 96 degrees).

Great air quality is the rule now and for the weekend. This changes a bit to start next week. Light dispersion could start to have a negative effect on Phoenix area air quality. The storm track is projected to retreat north and east away from Arizona as a flat and weak high pressure ridge begins to occupy the southwest corner of the Lower 48. This is something to keep in mind as local dust and burning activities can accumulate to gradually deteriorate air quality should we not have a means to clear the Valley airshed out.

Have an outstanding weekend and enjoy the outdoors if you get a chance to do so!


- J. Malloy
ADEQ Meteorologist


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