Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Wednesday Forecast:


Ozone

47 AQI
Max 8-hr Avg: 51 ppb

PM10

61 AQI
24-hr Avg: 75 µg/m3

PM2.5

58 AQI
24-hr Avg: 15.6 µg/m3

Thursday Forecast:


Ozone

45 AQI
Max 8-hr Avg: 49 ppb

PM10

63 AQI
24-hr Avg: 79 µg/m3

PM2.5

52 AQI
24-hr Avg: 12.6 µg/m3

Friday Forecast:


Ozone

43 AQI
Max 8-hr Avg: 46 ppb

PM10

59 AQI
24-hr Avg: 72 µg/m3

PM2.5

53 AQI
24-hr Avg: 12.9 µg/m3

Saturday Forecast:


Ozone

41 AQI
Max 8-hr Avg: 44 ppb

PM10

56 AQI
24-hr Avg: 65 µg/m3

PM2.5

52 AQI
24-hr Avg: 12.6 µg/m3

Sunday Forecast:


Ozone

42 AQI
Max 8-hr Avg: 45 ppb

PM10

44 AQI
24-hr Avg: 47 µg/m3

PM2.5

56 AQI
24-hr Avg: 14.7 µg/m3

Air Quality By Pollutant:

Pollutant
Wednesday
2/8/2023
Thursday
2/9/2023
Friday
2/10/2023
Saturday
2/11/2023
Sunday
2/12/2023
O3
47
45
43
41
42
PM10
61
63
59
56
44
PM2.5
58
52
53
52
56
Pollutant
WED
THU
FRI
SAT
SUN
O3
47
45
43
41
42
PM10
61
63
59
56
44
PM2.5
58
52
53
52
56
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

This morning, both PM10 (dust) and PM2.5 (smoke) are elevated in the industrial areas south, west, and northwest of Phoenix downtown. This is the highest these pollutants have been so far this work week. Weather conditions are also favorable for the local build-up of PM (i.e. calm, light winds).

Today, high pressure over Arizona will result in light winds for the Valley. PM10 and PM2.5 levels in the industrial areas should improve as the day heats up. But by the evening, they could increase again. The industrial areas will likely see both pollutants end up in the Moderate Air Quality Index (AQI) category. Elsewhere in the Valley should most likely see PM10 and PM2.5 in the Good AQI category.

After today, our attention shifts to the winds. The next several days are forecast to be breezy: winds out of the northeast on Thursday; winds out of the east on Friday and Saturday. With these winds comes the dual effect of reduced PM from local activity, but the possibility of dust from dust-prone areas. Then over the weekend, southerly winds preceding a cold front may result in pockets of dust from dust-prone areas.

In general, both PM10 and PM2.5 are forecast in the Moderate AQI category each day for now. But Moderate levels will be mostly limited to the industrial areas.

Check back tomorrow for the latest.

- M. Graves
ADEQ Meteorologist


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Thursday: Yellow

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