Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Wednesday Forecast:


Ozone

38 AQI
Max 8-hr Avg: 41 ppb

PM10

35 AQI
24-hr Avg: 38 µg/m3

PM2.5

52 AQI
24-hr Avg: 12.8 µg/m3

Thursday Forecast:


Ozone

38 AQI
Max 8-hr Avg: 41 ppb

PM10

34 AQI
24-hr Avg: 37 µg/m3

PM2.5

33 AQI
24-hr Avg: 7.9 µg/m3

Friday Forecast:


Ozone

36 AQI
Max 8-hr Avg: 39 ppb

PM10

31 AQI
24-hr Avg: 34 µg/m3

PM2.5

38 AQI
24-hr Avg: 9.1 µg/m3

Saturday Forecast:


Ozone

38 AQI
Max 8-hr Avg: 41 ppb

PM10

22 AQI
24-hr Avg: 24 µg/m3

PM2.5

34 AQI
24-hr Avg: 8.2 µg/m3

Sunday Forecast:


Ozone

39 AQI
Max 8-hr Avg: 42 ppb

PM10

21 AQI
24-hr Avg: 23 µg/m3

PM2.5

51 AQI
24-hr Avg: 12.2 µg/m3

Air Quality By Pollutant:

Pollutant
Wednesday
1/27/2021
Thursday
1/28/2021
Friday
1/29/2021
Saturday
1/30/2021
Sunday
1/31/2021
O3
38
38
36
38
39
PM10
35
34
31
22
21
PM2.5
52
33
38
34
51
Pollutant
WED
THU
FRI
SAT
SUN
O3
38
38
36
38
39
PM10
35
34
31
22
21
PM2.5
52
33
38
34
51
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

The Valley enjoyed another day of rather superb air quality yesterday, in the wake of a cleansing winter storm that left much of the higher terrain in Arizona underneath a blanket of white. PM10 (dust), PM2.5 (smoke), and ozone all stayed in the Good Air Quality Index (AQI) without much effort.

This morning, for the most part, PM10 and PM2.5 have been running low across the Valley's monitoring sites. However, there are some outliers. Monitoring sites located south and/or southwest of the Phoenix metro area are seeing localized elevated PM10 or PM2.5 levels. This is unsurprising though, given the cold morning temperatures and calm winds--favorable conditions for the build-up of local air pollution.

In general, the hourly forecast graphs in this Phoenix Air Quality Forecast will best represent the air quality in areas south/southwest of the Phoenix metro area. This is because these areas typically see the highest PM10 and/or PM2.5 levels on any given calm morning (from local industrial activity).

The good news for this air quality forecast though, is that we still have some more active weather coming our way this week. First of all, easterly winds today, tonight, and tomorrow will help to limit PM10 and PM2.5 levels. Then on Friday, another winter storm will visit the region and bring breezy southwesterly winds and additional rain chances to the Valley. This weather should help to keep air pollution in check.

Over the weekend, weather conditions will return to calm and mild again. Mornings will also continue to be Phoenix-cold, leveling out in the low 40s. Air quality-wise, local levels of PM2.5 will have to be watched because of the overnight stagnant conditions.

- M. Graves
ADEQ Meteorologist


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