Updated On: 9/30/2026 - 9:29 AM
Click on each day to view forecast.
Wednesday Forecast:
Ozone
45 AQI
Max 8-hr Avg: 49 ppb
Max 8-hr Avg: 49 ppb
PM10
8 AQI
24-hr Avg: 9 µg/m3
24-hr Avg: 9 µg/m3
PM2.5
21 AQI
24-hr Avg: 3.7 µg/m3
24-hr Avg: 3.7 µg/m3
Thursday Forecast:
Ozone
50 AQI
Max 8-hr Avg: 54 ppb
Max 8-hr Avg: 54 ppb
PM10
10 AQI
24-hr Avg: 11 µg/m3
24-hr Avg: 11 µg/m3
PM2.5
27 AQI
24-hr Avg: 4.9 µg/m3
24-hr Avg: 4.9 µg/m3
Friday Forecast:
Ozone
43 AQI
Max 8-hr Avg: 46 ppb
Max 8-hr Avg: 46 ppb
PM10
17 AQI
24-hr Avg: 18 µg/m3
24-hr Avg: 18 µg/m3
PM2.5
28 AQI
24-hr Avg: 5.1 µg/m3
24-hr Avg: 5.1 µg/m3
Saturday Forecast:
Ozone
41 AQI
Max 8-hr Avg: 44 ppb
Max 8-hr Avg: 44 ppb
PM10
17 AQI
24-hr Avg: 18 µg/m3
24-hr Avg: 18 µg/m3
PM2.5
31 AQI
24-hr Avg: 5.6 µg/m3
24-hr Avg: 5.6 µg/m3
Sunday Forecast:
Ozone
44 AQI
Max 8-hr Avg: 47 ppb
Max 8-hr Avg: 47 ppb
PM10
18 AQI
24-hr Avg: 19 µg/m3
24-hr Avg: 19 µg/m3
PM2.5
31 AQI
24-hr Avg: 5.6 µg/m3
24-hr Avg: 5.6 µg/m3
Air Quality By Pollutant:
Pollutant
Wednesday
9/30/2026
9/30/2026
Thursday
10/1/2026
10/1/2026
Friday
10/2/2026
10/2/2026
Saturday
10/3/2026
10/3/2026
Sunday
10/4/2026
10/4/2026
O3
45
50
43
41
44
PM10
8
10
17
17
18
PM2.5
21
27
28
31
31
Pollutant
WED
THU
FRI
SAT
SUN
O3
45
50
43
41
44
PM10
8
10
17
17
18
PM2.5
21
27
28
31
31
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns
Forecast Discussion:
Ozone was in the Good AQI category yesterday. Dry conditions have returned and will continue the next several days. The sunshine will increase the daily ozone levels the next few days, and it is forecast to reach the Upper Good AQI range tomorrow. Starting Friday there will be stronger east to southeast winds, and this could help limit ozone concentrations.
PM10 and PM2.5 were in the Good AQI range yesterday. Around 0.25"-0.75" were dropped in the Tucson area yesterday, and this will help to limit how much PM10 is lofted in the coming days. The next chance for stronger winds will be Friday as they come from the east and southeast. This will be monitored, but overall it will begin a string of breezy days through the weekend. Daily PM10 levels are forecast to remain in the Good AQI range, and PM2.5 will have similar trends.
- A. Hermansen
ADEQ Meteorologist
PM10 and PM2.5 were in the Good AQI range yesterday. Around 0.25"-0.75" were dropped in the Tucson area yesterday, and this will help to limit how much PM10 is lofted in the coming days. The next chance for stronger winds will be Friday as they come from the east and southeast. This will be monitored, but overall it will begin a string of breezy days through the weekend. Daily PM10 levels are forecast to remain in the Good AQI range, and PM2.5 will have similar trends.
- A. Hermansen
ADEQ Meteorologist
What Flag Should I Fly?
Thursday: Green
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Friday: Green
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