Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Wednesday Forecast:


Ozone

44 AQI
Max 8-hr Avg: 48 ppb

PM10

31 AQI
24-hr Avg: 33 µg/m3

PM2.5

31 AQI
24-hr Avg: 7.4 µg/m3

Thursday Forecast:


Ozone

45 AQI
Max 8-hr Avg: 49 ppb

PM10

44 AQI
24-hr Avg: 47 µg/m3

PM2.5

46 AQI
24-hr Avg: 11.1 µg/m3

Friday Forecast:


Ozone

46 AQI
Max 8-hr Avg: 50 ppb

PM10

42 AQI
24-hr Avg: 45 µg/m3

PM2.5

49 AQI
24-hr Avg: 11.7 µg/m3

Saturday Forecast:


Ozone

43 AQI
Max 8-hr Avg: 46 ppb

PM10

34 AQI
24-hr Avg: 37 µg/m3

PM2.5

51 AQI
24-hr Avg: 12.2 µg/m3

Sunday Forecast:


Ozone

41 AQI
Max 8-hr Avg: 44 ppb

PM10

31 AQI
24-hr Avg: 33 µg/m3

PM2.5

45 AQI
24-hr Avg: 10.9 µg/m3

Air Quality By Pollutant:

Pollutant
Wednesday
2/26/2020
Thursday
2/27/2020
Friday
2/28/2020
Saturday
2/29/2020
Sunday
3/1/2020
O3
44
45
46
43
41
PM10
31
44
42
34
31
PM2.5
31
46
49
51
45
Pollutant
WED
THU
FRI
SAT
SUN
O3
44
45
46
43
41
PM10
31
44
42
34
31
PM2.5
31
46
49
51
45
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

Yesterday was the Valley's fourth consecutive day of ozone, PM10 (dust), and PM2.5 (smoke) finishing in the Good Air Quality Index (AQI) category. Breezy winds out of the northeast played a role in keeping airborne particulates dispersed and thus, their concentrations low.

So far this morning, as of 7 AM, PM10 and PM2.5 levels have been running low around the Valley, thanks to continued winds. The only spots seeing somewhat elevated levels are the typical ones: areas southwest of the Phoenix metro area. As winds persist through the morning and into the early afternoon, they should help to limit PM10 and PM2.5 levels. Both pollutants are expected to stay in the Good AQI category today.

On Thursday and Friday, high pressure will gradually slide over the Southwest, resulting in lighter winds throughout the atmosphere and warming temperatures. Light winds are expected all day Thursday, but winds will be out of the east late morning and through afternoon on Friday. Then on Saturday, a strong jet stream is forecast to move over Arizona. This jet will cause winds to slightly increase out of the southwest later Saturday, then become breezy Sunday afternoon. Saturday is forecast to be the warmest day, with highs breaching the 80°F mark.

In regards to air quality, PM2.5 will be the primary pollutant of interest as morning/overnight levels should increase over the next several days because of the lighter winds; it may also have the potential to reach the Moderate AQI category over the weekend. PM10 should remain in the Good AQI category due to the stabilizing effect of the recent rain. And lastly, ozone should also stay in the Good AQI category.

- M. Graves
ADEQ Meteorologist


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Wednesday: Green
Thursday: Green

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