Tucson Forecast

Image of Downtown Tucson

Air Quality Hourly Forecast | Tucson

Click on each day to view forecast.

Wednesday Forecast:


Ozone

51 AQI
Max 8-hr Avg: 55 ppb

PM10

34 AQI
24-hr Avg: 37 µg/m3

PM2.5

33 AQI
24-hr Avg: 7.8 µg/m3

Thursday Forecast:


Ozone

58 AQI
Max 8-hr Avg: 57 ppb

PM10

33 AQI
24-hr Avg: 36 µg/m3

PM2.5

34 AQI
24-hr Avg: 8.1 µg/m3

Friday Forecast:


Ozone

47 AQI
Max 8-hr Avg: 51 ppb

PM10

36 AQI
24-hr Avg: 39 µg/m3

PM2.5

29 AQI
24-hr Avg: 7.0 µg/m3

Saturday Forecast:


Ozone

44 AQI
Max 8-hr Avg: 47 ppb

PM10

48 AQI
24-hr Avg: 52 µg/m3

PM2.5

28 AQI
24-hr Avg: 6.7 µg/m3

Sunday Forecast:


Ozone

46 AQI
Max 8-hr Avg: 50 ppb

PM10

35 AQI
24-hr Avg: 38 µg/m3

PM2.5

26 AQI
24-hr Avg: 6.3 µg/m3

Air Quality By Pollutant:

Pollutant
Wednesday
5/12/2021
Thursday
5/13/2021
Friday
5/14/2021
Saturday
5/15/2021
Sunday
5/16/2021
O3
51
58
47
44
46
PM10
34
33
36
48
35
PM2.5
33
34
29
28
26
Pollutant
WED
THU
FRI
SAT
SUN
O3
51
58
47
44
46
PM10
34
33
36
48
35
PM2.5
33
34
29
28
26
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

Ozone ended up in the Good Air Quality Index (AQI) category again yesterday, though it increased from the day before that. Looking ahead, high pressure will move over Arizona today and hang around through Thursday. As a result, lighter winds are expected each day, which will allow local ozone levels to accumulate more. Ozone is forecast in the Moderate AQI category today and Thursday.

Then by Friday, a weak low pressure wave will kick the high pressure out to the east and cause winds to increase out of the southwest (at least 10-15 mph) in Tucson. These winds are expected to be enough to reverse the rising ozone trend--ozone is thus forecast in the Good AQI category again.

But that's not all. Another low pressure wave--this one a bit stronger--will approach the state on Saturday and begin moving over by Sunday. Winds are forecast to be strongest on Saturday, reaching up to 15-20 mph with higher gusts, out of the southwest; Sunday will also be a breezy day. In light of these winds, ozone levels are forecast to continue in the Good AQI category over the weekend.

In regards to particulate matter (PM), PM10 (dust) levels are forecast to increase on Saturday with the breezy winds, given the potential for blowing dust. But we really can't rule out the possibility for pockets of dust in the afternoons Friday-Sunday. For now though, PM10 is forecast in the Good AQI category each day.

No issues with PM2.5 (smoke) are anticipated.

- M. Graves
ADEQ Meteorologist


What Flag Should I Fly?

Wednesday: Yellow
Thursday: Yellow

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