Phoenix Forecast

Image of the skyline of downtown phoenix

Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Tuesday Forecast:


Ozone

84 AQI
Max 8-hr Avg: 65 ppb

PM10

55 AQI
24-hr Avg: 63 µg/m3

PM2.5

31 AQI
24-hr Avg: 7.5 µg/m3

Wednesday Forecast:

Alert: Ozone Health Watch in effect for Wednesday

Ozone

93 AQI
Max 8-hr Avg: 68 ppb

PM10

55 AQI
24-hr Avg: 63 µg/m3

PM2.5

31 AQI
24-hr Avg: 7.5 µg/m3

Thursday Forecast:


Ozone

67 AQI
Max 8-hr Avg: 60 ppb

PM10

53 AQI
24-hr Avg: 59 µg/m3

PM2.5

30 AQI
24-hr Avg: 7.2 µg/m3

Friday Forecast:


Ozone

64 AQI
Max 8-hr Avg: 59 ppb

PM10

52 AQI
24-hr Avg: 58 µg/m3

PM2.5

28 AQI
24-hr Avg: 6.7 µg/m3

Saturday Forecast:


Ozone

74 AQI
Max 8-hr Avg: 62 ppb

PM10

48 AQI
24-hr Avg: 52 µg/m3

PM2.5

27 AQI
24-hr Avg: 6.4 µg/m3

Air Quality By Pollutant:

Pollutant
Tuesday
6/18/2019
Wednesday
6/19/2019
Thursday
6/20/2019
Friday
6/21/2019
Saturday
6/22/2019
O3
84
93
67
64
74
PM10
55
55
53
52
48
PM2.5
31
31
30
28
27
Pollutant
TUE
WED
THU
FRI
SAT
O3
84
93
67
64
74
PM10
55
55
53
52
48
PM2.5
31
31
30
28
27
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

Ozone will be the main pollutant of interest for this Phoenix air quality forecast.

Today, despite relatively light winds expected near the ground, observed winds just above the ground this morning look elevated enough to help limit ozone levels. Thus, today's ozone forecast has been decreased below the Health Watch range (90-100 AQI).

Tomorrow (Wednesday), as higher pressure moves over the region, ozone levels are expected to have a greater potential to accumulate. Therefore, ozone is forecast to increase and an Ozone Health Watch has been issued.

By Thursday, a large low pressure system will begin to expand over the Northwest U.S. A low pressure trough will then swing through Arizona on Friday. Stronger winds out of the southwest both days are expected to help reduce ozone levels. Then on Saturday, ozone levels are forecast to increase as winds become lighter.

Regarding PM10 (dust), hourly forecast values reflect the local dust-producing activities near the West 43rd monitor (located southwest of the Pheonix metro area). Elsewhere around the Valley, PM10 is expected to remain in the Good AQI category.

Lastly, we continue to watch the Woodbury wildfire in the Superstition wilderness area. The good news is that winds look to be favorable to keep smoke to the east of the Valley. Thus, PM2.5 (smoke, soot) is forecast in the Good AQI category.

- M. Graves
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 >