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Updated On: 8/20/2026 - 8:37 AM
Click on each day to view forecast.

Thursday Forecast:


Ozone

67 AQI
Max 8-hr Avg: 60 ppb

PM10

22 AQI
24-hr Avg: 24 µg/m3

PM2.5

32 AQI
24-hr Avg: 5.7 µg/m3

Friday Forecast:


Ozone

64 AQI
Max 8-hr Avg: 59 ppb

PM10

21 AQI
24-hr Avg: 23 µg/m3

PM2.5

36 AQI
24-hr Avg: 6.4 µg/m3

Saturday Forecast:


Ozone

64 AQI
Max 8-hr Avg: 59 ppb

PM10

21 AQI
24-hr Avg: 23 µg/m3

PM2.5

31 AQI
24-hr Avg: 5.6 µg/m3

Sunday Forecast:


Ozone

71 AQI
Max 8-hr Avg: 61 ppb

PM10

22 AQI
24-hr Avg: 24 µg/m3

PM2.5

32 AQI
24-hr Avg: 5.7 µg/m3

Monday Forecast:


Ozone

58 AQI
Max 8-hr Avg: 57 ppb

PM10

22 AQI
24-hr Avg: 24 µg/m3

PM2.5

31 AQI
24-hr Avg: 5.5 µg/m3

Air Quality By Pollutant:

Pollutant
Thursday
8/20/2026
Friday
8/21/2026
Saturday
8/22/2026
Sunday
8/23/2026
Monday
8/24/2026
O3
67
64
64
71
58
PM10
22
21
21
22
22
PM2.5
32
36
31
32
31
Pollutant
THU
FRI
SAT
SUN
MON
O3
67
64
64
71
58
PM10
22
21
21
22
22
PM2.5
32
36
31
32
31
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns


Forecast Discussion:

Monsoon activity began once again in the afternoon, and this brought an increase in PM10 and PM2.5 levels. The peak of activity was between 6-7 PM where gusts in Tucson reached 45-55 mph. With the increased activity from last night, less activity is forecast today than yesterday. Still, an evening increase in PM10 and PM2.5 is possible with brief blowing dust possible with any storms. However, both of these will be in the Good AQI category for the week.

Ozone reached the Moderate AQI category yesterday, and the rest of the week will continue this trend. This will be taken day by day as cloud cover and showers/thunderstorms will impact these levels.

- A. Hermansen
ADEQ Meteorologist


What Flag Should I Fly?

Friday: Yellow
Air Quality chart showing the air quality to be Yellow for Moderate for this specific time or day. Moderate air quality may be a health concern for those who are unusually sensitive to air pollution. 		Saturday: Yellow
Air Quality chart showing the air quality to be Yellow for Moderate for this specific time or day. Moderate air quality may be a health concern for those who are unusually sensitive to air pollution.

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