Tucson Forecast

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Air Quality Hourly Forecast | Tucson

Click on each day to view forecast.

Monday Forecast:


Ozone

67 AQI
Max 8-hr Avg: 60 ppb

PM10

19 AQI
24-hr Avg: 21 µg/m3

PM2.5

29 AQI
24-hr Avg: 7.0 µg/m3

Tuesday Forecast:


Ozone

64 AQI
Max 8-hr Avg: 59 ppb

PM10

22 AQI
24-hr Avg: 24 µg/m3

PM2.5

28 AQI
24-hr Avg: 6.8 µg/m3

Wednesday Forecast:


Ozone

61 AQI
Max 8-hr Avg: 58 ppb

PM10

24 AQI
24-hr Avg: 26 µg/m3

PM2.5

27 AQI
24-hr Avg: 6.5 µg/m3

Thursday Forecast:


Ozone

58 AQI
Max 8-hr Avg: 57 ppb

PM10

22 AQI
24-hr Avg: 24 µg/m3

PM2.5

28 AQI
24-hr Avg: 6.6 µg/m3

Friday Forecast:


Ozone

58 AQI
Max 8-hr Avg: 57 ppb

PM10

24 AQI
24-hr Avg: 26 µg/m3

PM2.5

27 AQI
24-hr Avg: 6.4 µg/m3

Air Quality By Pollutant:

Pollutant
Monday
7/26/2021
Tuesday
7/27/2021
Wednesday
7/28/2021
Thursday
7/29/2021
Friday
7/30/2021
O3
67
64
61
58
58
PM10
19
22
24
22
24
PM2.5
29
28
27
28
27
Pollutant
MON
TUE
WED
THU
FRI
O3
67
64
61
58
58
PM10
19
22
24
22
24
PM2.5
29
28
27
28
27
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

After a cool and wet weekend, weather conditions in Tucson will return closer to normal this week. For this time of year, "normal" is highs in the upper 90s. But of course, during active periods of the monsoon, humidity will remain, and afternoon high temperatures will vary from day to day, depending on thunderstorm activity.

This week, an active monsoon pattern will persist over Arizona, which will open the door for continued daily thunderstorm chances in/around the Tucson area. And as usual, clouds, gusty winds, and rain will all be possible with any thunderstorm. For now though, thunderstorm coverage and chances look to increase during the latter half of the week.

Air quality-wise, ozone will be the main pollutant of interest for this forecast. Each day, before thunderstorms develop, ozone is expected to have enough time to form and accumulate in Tucson. Therefore, ozone is forecast in the Moderate Air Quality Index (AQI) category throughout the week. With greater storm chances later in the week, ozone levels are currently forecast to trend downwards.

Smoke from wildfires in northern California and the Pacific Northwest may also be present, which could help to increase ozone levels. But there is some uncertainty in the smoke's influence on ozone.

Regarding PM10 (dust), the recent rain in southeastern Arizona should help to stabilize soils enough to prevent any dust concerns for Tucson.

- M. Graves
ADEQ Meteorologist


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Monday: Yellow
Tuesday: Yellow

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