Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Thursday Forecast:

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

Ozone

105 AQI
Max 8-hr Avg: 72 ppb

PM10

41 AQI
24-hr Avg: 44 µg/m3

PM2.5

28 AQI
24-hr Avg: 6.6 µg/m3

Friday Forecast:

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

Ozone

101 AQI
Max 8-hr Avg: 71 ppb

PM10

49 AQI
24-hr Avg: 53 µg/m3

PM2.5

30 AQI
24-hr Avg: 7.2 µg/m3

Saturday Forecast:


Ozone

90 AQI
Max 8-hr Avg: 67 ppb

PM10

44 AQI
24-hr Avg: 48 µg/m3

PM2.5

32 AQI
24-hr Avg: 7.6 µg/m3

Sunday Forecast:


Ozone

80 AQI
Max 8-hr Avg: 64 ppb

PM10

40 AQI
24-hr Avg: 43 µg/m3

PM2.5

33 AQI
24-hr Avg: 7.9 µg/m3

Monday Forecast:


Ozone

87 AQI
Max 8-hr Avg: 66 ppb

PM10

45 AQI
24-hr Avg: 49 µg/m3

PM2.5

54 AQI
24-hr Avg: 13.5 µg/m3

Air Quality By Pollutant:

Pollutant
Thursday
6/30/2022
Friday
7/1/2022
Saturday
7/2/2022
Sunday
7/3/2022
Monday
7/4/2022
O3
105
101
90
80
87
PM10
41
49
44
40
45
PM2.5
28
30
32
33
54
Pollutant
THU
FRI
SAT
SUN
MON
O3
105
101
90
80
87
PM10
41
49
44
40
45
PM2.5
28
30
32
33
54
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, 7/1/2022. Full Details >

Forecast Discussion:

Yesterday (Wednesday) was a more active day, but storm activity was not very widespread in the Valley. Several strong outflows moved through during the afternoon, bringing plenty of dust to the region. Fortunately, no PM-10 (dust) monitors exceeded the federal health standard as dust was fairly dense but did not last long. During the evening, strong thunderstorms formed over the Bradshaws, which sent another outflow through the Valley from NW to SE, allowing isolated thunderstorms to form. The highest rainfall totals were in Sun City West, with one Maricopa County Flood Control gauge measuring 0.51 inches.

This morning there are plenty of debris clouds and a few light showers in the Valley as a weak disturbance moves through. These clouds and isolated showers will quickly move off toward the north-northeast a bit later this morning. Starting today through at least July 4th high pressure will continue slowly moving eastward as a trough of low pressure develops along the West Coast of the United States. This is going to bring a southwest to northeast flow to the region that will act to push a lot of the moisture well east of the Valley of the Sun. As a result, expecting slight chances for isolated storms in the Valley this afternoon as moisture is still present, but after that, chances will be low (less than 10%).

As for air quality, ozone will be the primary pollutant of concern. Lately, ozone values have been running slightly higher than forecasts, and with not much storm activity expected this afternoon, values are forecast to exceed the federal health standard, with similar conditions expected tomorrow. As a result, an Ozone High Pollution Advisory will be issued for Phoenix today and tomorrow. As the trough deepens along the West Coast this weekend, ozone values are expected to lower given the increase in breezes at the surface and high up in the atmosphere, as a result, the Ozone High Pollution Watch that was in place this weekend will be dropped.

Have a great day!

- M. Pace
ADEQ Meteorologist


What Flag Should I Fly?

Friday: Orange
Saturday: 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