Tucson Forecast

Image of Downtown Tucson

Air Quality Hourly Forecast | Tucson

Click on each day to view forecast.

Monday Forecast:


Ozone

45 AQI
Max 8-hr Avg: 49 ppb

PM10

17 AQI
24-hr Avg: 18 µg/m3

PM2.5

30 AQI
24-hr Avg: 7.1 µg/m3

Tuesday Forecast:


Ozone

47 AQI
Max 8-hr Avg: 51 ppb

PM10

21 AQI
24-hr Avg: 23 µg/m3

PM2.5

31 AQI
24-hr Avg: 7.5 µg/m3

Wednesday Forecast:


Ozone

46 AQI
Max 8-hr Avg: 50 ppb

PM10

21 AQI
24-hr Avg: 23 µg/m3

PM2.5

29 AQI
24-hr Avg: 7.0 µg/m3

Thursday Forecast:


Ozone

44 AQI
Max 8-hr Avg: 47 ppb

PM10

17 AQI
24-hr Avg: 18 µg/m3

PM2.5

29 AQI
24-hr Avg: 6.9 µg/m3

Friday Forecast:


Ozone

46 AQI
Max 8-hr Avg: 50 ppb

PM10

20 AQI
24-hr Avg: 22 µg/m3

PM2.5

30 AQI
24-hr Avg: 7.2 µg/m3

Air Quality By Pollutant:

Pollutant
Monday
9/27/2021
Tuesday
9/28/2021
Wednesday
9/29/2021
Thursday
9/30/2021
Friday
10/1/2021
O3
45
47
46
44
46
PM10
17
21
21
17
20
PM2.5
30
31
29
29
30
Pollutant
MON
TUE
WED
THU
FRI
O3
45
47
46
44
46
PM10
17
21
21
17
20
PM2.5
30
31
29
29
30
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

What a great weekend weather-wise! Well, if you like cooler and active weather. Looking at rain gauges, most locations in the city saw between 0.25 and 0.50 inches of rain this weekend, with Tucson International Airport measuring 0.30 inches. The high temperature yesterday was also a nice cool 82 degrees, which was 10 degrees below the average for this time of year!

Water vapor this morning shows the low pressure that brought all the rain to the region now centered over the Arizona/New Mexico border. As moisture wraps around the backside of the low, expect a slight chance of isolated showers and thunderstorms through today before chances come to an end shortly after sunset.

Expecting quiet weather tomorrow, before another trough of low pressure approaches from the northwest Wednesday into Thursday. As this system moves in, expecting rain chances to increase late Wednesday through Thursday, with another 0.25-0.50 inches of rain possible. This system will also bring more cool air with it, with afternoon high temperatures on Thursday forecast to be in the upper 70s to low 80s!

As the system moves east, high pressure is forecast to build back into the region Friday into the weekend, with afternoon high temperatures forecast to rise back into the upper 80s to low 90s Saturday and Sunday.

As for air quality, there is good news! With the active weather pattern continuing, along with all the rain lately settling dust, forecasting ozone, PM-10 and PM-2.5 to all be in the Good AQI category through the forecast period.

- M. Pace
ADEQ Meteorologist


What Flag Should I Fly?

Tuesday: Green
Wednesday: Green

What is the Flag Program and how can my school/organization join? | Learn More >