Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Tuesday Forecast:


Ozone

51 AQI
Max 8-hr Avg: 55 ppb

PM10

40 AQI
24-hr Avg: 43 µg/m3

PM2.5

38 AQI
24-hr Avg: 9.0 µg/m3

Wednesday Forecast:


Ozone

71 AQI
Max 8-hr Avg: 61 ppb

PM10

50 AQI
24-hr Avg: 54 µg/m3

PM2.5

35 AQI
24-hr Avg: 8.4 µg/m3

Thursday Forecast:

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

Ozone

101 AQI
Max 8-hr Avg: 71 ppb

PM10

54 AQI
24-hr Avg: 61 µg/m3

PM2.5

36 AQI
24-hr Avg: 8.6 µg/m3

Friday Forecast:

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

Ozone

101 AQI
Max 8-hr Avg: 71 ppb

PM10

56 AQI
24-hr Avg: 65 µg/m3

PM2.5

38 AQI
24-hr Avg: 9.2 µg/m3

Saturday Forecast:


Ozone

93 AQI
Max 8-hr Avg: 68 ppb

PM10

44 AQI
24-hr Avg: 48 µg/m3

PM2.5

37 AQI
24-hr Avg: 8.8 µg/m3

Air Quality By Pollutant:

Pollutant
Tuesday
7/5/2022
Wednesday
7/6/2022
Thursday
7/7/2022
Friday
7/8/2022
Saturday
7/9/2022
O3
51
71
101
101
93
PM10
40
50
54
56
44
PM2.5
38
35
36
38
37
Pollutant
TUE
WED
THU
FRI
SAT
O3
51
71
101
101
93
PM10
40
50
54
56
44
PM2.5
38
35
36
38
37
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

Air quality has been surprisingly good the past few days. A trough over the west coast has provided enough ventilation to actually keep ozone in the Good AQI range. PM10 and PM2.5 have also stayed in the Good AQI range the past few days, however, there were a few hours of elevated PM2.5 levels last night due to celebratory fireworks.

This week, we are forecasting ozone levels to begin trending up as the ridge strengthens over the region. Thursday and Friday look to have the calmest conditions, which may allow ozone to reach the Unhealthy for Sensitive Groups AQI category. Therefore, we do have an ozone High Pollution Watch in effect for Thursday and Friday. On Saturday, we may see some increased cloud cover as more storm activity returns to southern and eastern Arizona. This increased cloud cover will hopefully be enough to drop ozone back into the Moderate AQI range.

Looking at PM10, the calm and dry conditions the next few days will likely allow particulate levels to reach into the low Moderate AQI range by Thursday and Friday. Less dust-generating work activities on Saturday should help lower PM10 levels back down a little. PM2.5 is forecast to remain in the Good AQI range through the entire forecast period.

- R. Nicoll
ADEQ Meteorologist


What Flag Should I Fly?

Tuesday: Yellow
Wednesday: 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