Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Wednesday Forecast:

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

Ozone

105 AQI
Max 8-hr Avg: 72 ppb

PM10

60 AQI
24-hr Avg: 73 µg/m3

PM2.5

36 AQI
24-hr Avg: 8.7 µg/m3

Thursday Forecast:

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

Ozone

105 AQI
Max 8-hr Avg: 72 ppb

PM10

62 AQI
24-hr Avg: 77 µg/m3

PM2.5

40 AQI
24-hr Avg: 9.5 µg/m3

Friday Forecast:


Ozone

93 AQI
Max 8-hr Avg: 68 ppb

PM10

54 AQI
24-hr Avg: 62 µg/m3

PM2.5

37 AQI
24-hr Avg: 8.9 µg/m3

Saturday Forecast:


Ozone

74 AQI
Max 8-hr Avg: 62 ppb

PM10

51 AQI
24-hr Avg: 55 µg/m3

PM2.5

39 AQI
24-hr Avg: 9.4 µg/m3

Sunday Forecast:


Ozone

61 AQI
Max 8-hr Avg: 58 ppb

PM10

46 AQI
24-hr Avg: 50 µg/m3

PM2.5

39 AQI
24-hr Avg: 9.3 µg/m3

Air Quality By Pollutant:

Pollutant
Wednesday
5/25/2022
Thursday
5/26/2022
Friday
5/27/2022
Saturday
5/28/2022
Sunday
5/29/2022
O3
105
105
93
74
61
PM10
60
62
54
51
46
PM2.5
36
40
37
39
39
Pollutant
WED
THU
FRI
SAT
SUN
O3
105
105
93
74
61
PM10
60
62
54
51
46
PM2.5
36
40
37
39
39
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, 5/26/2022. Full Details >

Forecast Discussion:

High pressure is now strengthening over the western United States, and that means temperatures are on the rise. We are expecting afternoon temperatures to be back in the triple digits for the remainder of the week. Temperatures aren't the only thing on the rise, these calm and sunny conditions will also cause ozone levels to increase. We are forecasting ozone concentrations to reach into the Unhealthy for Sensitive Groups AQI category today and tomorrow. Therefore, there are Ozone High Pollution Advisories in effect for today (Wednesday) and tomorrow (Thursday). Beginning Friday, the ridge over the region will begin to move off to the east, and troughing will begin pushing in from the west. This will begin to improve ventilation over the region, and should start a downward trend in ozone levels.

Looking at particulates, we expect to continue seeing elevated PM10 concentrations during the stagnant morning hours. Then, afternoon concentrations will improve with better atmospheric mixing during the warmer hours. As we head into the weekend, we are expecting lower morning concentrations due to less dust-generating work activities going on. However, afternoon concentrations are forecast to be a little higher with breezier conditions as the trough moves into the region. Overall though, we do expect the weekend to have lower concentrations than during the week. PM2.5 isn't expected to be an issue and should stay in the Good AQI range through the forecast period.

- R. Nicoll
ADEQ Meteorologist


What Flag Should I Fly?

Thursday: Orange
Friday: Yellow

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