Tucson Forecast

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Air Quality Hourly Forecast | Tucson

Click on each day to view forecast.

Tuesday Forecast:


Ozone

34 AQI
Max 8-hr Avg: 37 ppb

PM10

47 AQI
24-hr Avg: 51 µg/m3

PM2.5

36 AQI
24-hr Avg: 8.7 µg/m3

Wednesday Forecast:


Ozone

32 AQI
Max 8-hr Avg: 35 ppb

PM10

30 AQI
24-hr Avg: 32 µg/m3

PM2.5

30 AQI
24-hr Avg: 7.2 µg/m3

Thursday Forecast:


Ozone

35 AQI
Max 8-hr Avg: 38 ppb

PM10

14 AQI
24-hr Avg: 15 µg/m3

PM2.5

24 AQI
24-hr Avg: 5.8 µg/m3

Friday Forecast:


Ozone

37 AQI
Max 8-hr Avg: 40 ppb

PM10

23 AQI
24-hr Avg: 25 µg/m3

PM2.5

39 AQI
24-hr Avg: 9.4 µg/m3

Saturday Forecast:


Ozone

34 AQI
Max 8-hr Avg: 37 ppb

PM10

24 AQI
24-hr Avg: 26 µg/m3

PM2.5

34 AQI
24-hr Avg: 8.2 µg/m3

Air Quality By Pollutant:

Pollutant
Tuesday
1/19/2021
Wednesday
1/20/2021
Thursday
1/21/2021
Friday
1/22/2021
Saturday
1/23/2021
O3
34
32
35
37
34
PM10
47
30
14
23
24
PM2.5
36
30
24
39
34
Pollutant
TUE
WED
THU
FRI
SAT
O3
34
32
35
37
34
PM10
47
30
14
23
24
PM2.5
36
30
24
39
34
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

Some active weather is in store for Arizona over the next few days. Today, a low pressure wave centered over central Nevada this morning will drop southward to over the Pacific Ocean, just west of the Baja Peninsula. This wave will then stall temporarily before progressing eastward through Arizona on Thursday.

During this time, cooler temperatures, cloud cover, breezy winds, and even rain will visit southern Arizona. Of immediate interest will be the winds today and tomorrow. Winds will begin out of the south, then shift to out of the east later in the evening. As a result, elevated PM10 (dust) levels will be possible at times today and tomorrow morning.

The good news though is that once the rain starts, it will help to bring dust levels back down. Currently, the window for rain looks to be from tomorrow afternoon through Thursday morning. But there's still plenty of uncertainty in the expected total rainfall amounts. Up to an inch or more is on the table.

By later Thursday, rain chances will diminish and winds weaken. But another low pressure wave will begin approaching from the west on Friday. We'll end the week with increased winds and some more rain chances.

Other than possible dust preceding the rain later tomorrow, no air quality issues are anticipated at this time, save any PM10 or PM2.5 (smoke) from local activity.

- M. Graves
ADEQ Meteorologist


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Tuesday: Green
Wednesday: Green

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