Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Friday Forecast:

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

Ozone

122 AQI
Max 8-hr Avg: 77 ppb

PM10

39 AQI
24-hr Avg: 42 µg/m3

PM2.5

26 AQI
24-hr Avg: 6.3 µg/m3

Saturday Forecast:

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

Ozone

119 AQI
Max 8-hr Avg: 76 ppb

PM10

36 AQI
24-hr Avg: 39 µg/m3

PM2.5

25 AQI
24-hr Avg: 6.0 µg/m3

Sunday Forecast:

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

Ozone

108 AQI
Max 8-hr Avg: 73 ppb

PM10

35 AQI
24-hr Avg: 38 µg/m3

PM2.5

24 AQI
24-hr Avg: 5.7 µg/m3

Monday Forecast:


Ozone

93 AQI
Max 8-hr Avg: 68 ppb

PM10

41 AQI
24-hr Avg: 44 µg/m3

PM2.5

26 AQI
24-hr Avg: 6.2 µg/m3

Tuesday Forecast:


Ozone

87 AQI
Max 8-hr Avg: 66 ppb

PM10

43 AQI
24-hr Avg: 46 µg/m3

PM2.5

27 AQI
24-hr Avg: 6.4 µg/m3

Air Quality By Pollutant:

Pollutant
Friday
8/5/2022
Saturday
8/6/2022
Sunday
8/7/2022
Monday
8/8/2022
Tuesday
8/9/2022
O3
122
119
108
93
87
PM10
39
36
35
41
43
PM2.5
26
25
24
26
27
Pollutant
FRI
SAT
SUN
MON
TUE
O3
122
119
108
93
87
PM10
39
36
35
41
43
PM2.5
26
25
24
26
27
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, 8/7/2022. Full Details >

Forecast Discussion:

The Valley was graced by morning thunderstorms and rain yesterday (Thursday). But once storm activity and storm-related clouds departed to the west, ozone quickly increased around the Valley. Light winds and sunny skies for the rest of the day were favorable conditions for elevated ozone. When was all said and done, eight monitors saw ozone exceed the federal health standard.

Today (Friday) looks to be a quiet day, as is typical after an active monsoon day. Given yesterday's ozone outcome, plus more light winds and sunny skies today, ozone is expected to be elevated again. Ozone will have the potential to exceed the health standard again, therefore we've issued an Ozone High Pollution Advisory (HPA) for today.

Saturday also looks to be a mostly quiet day. The main difference is that there will be a greater chance for thunderstorm winds to move into the Valley later in the evening/night. But since the atmosphere will have dried out a bit by then, actual thunderstorm chances for the Valley will be slim. Air quality-wise, light winds and mostly sunny skies will be favorable for elevated ozone again. Therefore, we issued an Ozone HPA for Saturday. Brief jumps in PM10 (dust) may also be possible in the evening/night with the winds, but nothing too significant is anticipated.

By Sunday, a disturbance passing over the region is forecast to help spur on thunderstorm activity in the evening/night. Ahead of these storms, gusts could result in brief blowing dust. But any rain would help to knock down airborne dust. What happens with ozone during the day however, will depend on the timing of storm-related clouds. An Ozone HPA has been issued for Sunday because of the potential for elevated ozone still.

Then by early next week, a passing tropical system below the Gulf will help to push moisture into Arizona and result in daily thunderstorm chances for the Valley. What happens from day to day is highly uncertain at this point though. Ozone should continue to be the main pollutant of interest, rising and falling with monsoonal weather. We will reevaluate the ozone forecast for Monday and Tuesday to see if any changes need to be made.

- M. Graves
ADEQ Meteorologist


What Flag Should I Fly?

Sunday: Orange
Monday: 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