Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Monday Forecast:

Alert: Ozone High Pollution Advisory in effect for Monday. Health Impacts >

Ozone

101 AQI
Max 8-hr Avg: 71 ppb

PM10

33 AQI
24-hr Avg: 36 µg/m3

PM2.5

33 AQI
24-hr Avg: 8.0 µg/m3

Tuesday Forecast:

Alert: Ozone High Pollution Advisory in effect for Tuesday. Health Impacts >

Ozone

108 AQI
Max 8-hr Avg: 73 ppb

PM10

41 AQI
24-hr Avg: 44 µg/m3

PM2.5

32 AQI
24-hr Avg: 7.7 µg/m3

Wednesday Forecast:


Ozone

80 AQI
Max 8-hr Avg: 64 ppb

PM10

48 AQI
24-hr Avg: 52 µg/m3

PM2.5

28 AQI
24-hr Avg: 6.7 µg/m3

Thursday Forecast:


Ozone

90 AQI
Max 8-hr Avg: 67 ppb

PM10

37 AQI
24-hr Avg: 40 µg/m3

PM2.5

23 AQI
24-hr Avg: 5.4 µg/m3

Friday Forecast:


Ozone

84 AQI
Max 8-hr Avg: 65 ppb

PM10

34 AQI
24-hr Avg: 37 µg/m3

PM2.5

24 AQI
24-hr Avg: 5.7 µg/m3

Air Quality By Pollutant:

Pollutant
Monday
8/15/2022
Tuesday
8/16/2022
Wednesday
8/17/2022
Thursday
8/18/2022
Friday
8/19/2022
O3
101
108
80
90
84
PM10
33
41
48
37
34
PM2.5
33
32
28
23
24
Pollutant
MON
TUE
WED
THU
FRI
O3
101
108
80
90
84
PM10
33
41
48
37
34
PM2.5
33
32
28
23
24
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Notice:
The Maricopa County Air Quality Department has issued a No Burn Day for today, 8/15/2022. Full Details >

Forecast Discussion:

Ozone levels over the weekend reached a little higher than expected on Saturday and lower on Sunday. Saturday ended up exceeding the federal health standard due to storm activity reaching the area later in the evening, which gave more time for ozone to build up. Then on Sunday, storm activity moved into the area earlier, which shutdown the development of ozone. As for PM10 and PM2.5, they were mostly good through the weekend, with just one PM2.5 monitor barely reaching the Moderate category on Sunday.

Looking ahead to this week, today and tomorrow are looking to be a little calmer when it comes to storm activity. As a result, ozone levels are forecast to have sufficient time to build up into the Unhealthy for Sensitive Groups AQI category. Therefore, we have issued ozone High Pollution Advisories for today and tomorrow. Beginning Wednesday, an inverted trough will begin moving into the region from the southeast. This is forecast to improve ventilation and increase thunderstorm activity across the state, which should help lower ozone levels back down into the Moderate AQI category.

As for particulates, we are expecting fairly quiet conditions the next couple days. Other than slightly elevated concentrations during the calm mornings, we don't anticipate any issues. For the later half of the week, increased thunderstorm activity around the area will increase the chances for brief dust in the afternoons from thunderstorm outflows. However, given the recent rain the area has received, we aren't forecasting any major dust events. PM10 and PM2.5 are forecast to stay in the Good AQI category through the forecast period.

- R. Nicoll
ADEQ Meteorologist


What Flag Should I Fly?

Monday: Orange
Tuesday: Orange

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

Ozone & Your Health

People most vulnerable to the impacts of air pollution include children, older adults, adults exercising outdoors, people with heart or lung disease, and those suffering from asthma and bronchitis. Exposure to ozone can increase the number and severity of asthma attacks, cause or aggravate bronchitis or other lung disease, and reduce the body's ability to fight infection. Symptoms may include itchy eyes, nose and throat, wheezing, coughing, shortness of breath, chest pain and upper respiratory issues | View ADEQ Ozone Fact Sheet >

Please help reduce ozone by doing one or more of the following:
  • Drive as little as possible, carpool, use public transit or telecommute
  • Re-fuel your vehicle in the evening
  • Avoid waiting in long drive-thru lines, if possible
  • Use low-VOC (Volatile Organic Compounds) or water-based paints, stains, finishes and paint strippers - delay big painting projects
  • Make sure containers of household cleaners, garage and yard chemicals, and other solvents are sealed properly to prevent vapors from evaporating into the air