Phoenix Forecast

Image of the skyline of downtown phoenix

Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Friday Forecast:


Ozone

77 AQI
Max 8-hr Avg: 63 ppb

PM10

66 AQI
24-hr Avg: 85 µg/m3

PM2.5

49 AQI
24-hr Avg: 11.7 µg/m3

Saturday Forecast:


Ozone

67 AQI
Max 8-hr Avg: 60 ppb

PM10

47 AQI
24-hr Avg: 51 µg/m3

PM2.5

45 AQI
24-hr Avg: 10.7 µg/m3

Sunday Forecast:


Ozone

74 AQI
Max 8-hr Avg: 62 ppb

PM10

45 AQI
24-hr Avg: 49 µg/m3

PM2.5

45 AQI
24-hr Avg: 10.7 µg/m3

Monday Forecast:


Ozone

80 AQI
Max 8-hr Avg: 64 ppb

PM10

53 AQI
24-hr Avg: 60 µg/m3

PM2.5

51 AQI
24-hr Avg: 12.1 µg/m3

Tuesday Forecast:


Ozone

80 AQI
Max 8-hr Avg: 64 ppb

PM10

57 AQI
24-hr Avg: 68 µg/m3

PM2.5

51 AQI
24-hr Avg: 12.1 µg/m3

Air Quality By Pollutant:

Pollutant
Friday
9/25/2020
Saturday
9/26/2020
Sunday
9/27/2020
Monday
9/28/2020
Tuesday
9/29/2020
O3
77
67
74
80
80
PM10
66
47
45
53
57
PM2.5
49
45
45
51
51
Pollutant
FRI
SAT
SUN
MON
TUE
O3
77
67
74
80
80
PM10
66
47
45
53
57
PM2.5
49
45
45
51
51
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

Most of the ozone monitors in the Phoenix area ended up in the mid-to-upper Moderate AQI range, with one monitor barely managing to peak into the Unhealthy for Sensitive Groups category. There is a weak mid-level trough to our west that should increase ventilation and help lower ozone levels. We forecast ozone to drop into the mid Moderate range through the weekend. We then forecast ozone to trend up a little early next week with a strong ridge over the west coast, but decent mid-level winds should prevent ozone from increasing too much.

PM10 levels this morning are rather high under these stagnant weather conditions. Fortunately, that should improve by late morning and be fine through the afternoon. We don't anticipate PM10 concentrations to be as high over the weekend with better ventilation and less dust-generating work activities. However, highest concentrations will continue to be during the morning and evening hours. PM10 will likely return to the Moderate category next Monday under calmer conditions and a return to normal work week activities. PM2.5 is forecast to stay in the Good range through the weekend, then like PM10, return to the Moderate range early next week.

- R. Nicoll
ADEQ Meteorologist


What Flag Should I Fly?

Monday: Yellow
Tuesday: Yellow

What is the Flag Program and how can my school/organization join? | Learn More >