Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Thursday Forecast:

Alert: Ozone High Pollution Advisory in effect for Thursday

Ozone

115 AQI
Max 8-hr Avg: 75 ppb

PM10

60 AQI
24-hr Avg: 73 µg/m3

PM2.5

47 AQI
24-hr Avg: 11.3 µg/m3

Friday Forecast:

Alert: Ozone High Pollution Advisory in effect for Friday

Ozone

108 AQI
Max 8-hr Avg: 73 ppb

PM10

63 AQI
24-hr Avg: 79 µg/m3

PM2.5

46 AQI
24-hr Avg: 11.0 µg/m3

Saturday Forecast:


Ozone

87 AQI
Max 8-hr Avg: 66 ppb

PM10

41 AQI
24-hr Avg: 44 µg/m3

PM2.5

32 AQI
24-hr Avg: 7.6 µg/m3

Sunday Forecast:


Ozone

80 AQI
Max 8-hr Avg: 64 ppb

PM10

34 AQI
24-hr Avg: 37 µg/m3

PM2.5

29 AQI
24-hr Avg: 6.9 µg/m3

Monday Forecast:


Ozone

84 AQI
Max 8-hr Avg: 65 ppb

PM10

56 AQI
24-hr Avg: 66 µg/m3

PM2.5

31 AQI
24-hr Avg: 7.5 µg/m3

Air Quality By Pollutant:

Pollutant
Thursday
6/17/2021
Friday
6/18/2021
Saturday
6/19/2021
Sunday
6/20/2021
Monday
6/21/2021
O3
115
108
87
80
84
PM10
60
63
41
34
56
PM2.5
47
46
32
29
31
Pollutant
THU
FRI
SAT
SUN
MON
O3
115
108
87
80
84
PM10
60
63
41
34
56
PM2.5
47
46
32
29
31
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

High pressure will continue to be the dominant weather pattern over the Southwest through this forecast period. As a result, at least through Sunday, excessive heat will persist in the Phoenix Valley. Today and Friday are forecast to be the hottest days, with highs just above 115°F.

The Telegraph Fire, located about 40 miles east of Phoenix, also continues to burn. The good news is that lighter smoke production is expected today. However, we can't rule out the possibility of some smoke reaching the Valley.

View the Telegraph Fire smoke forecast here.

This morning, PM10 (dust) levels are running a little elevated at multiple monitors around the Valley. But once the day starts to heat up and winds pick up later this morning, PM10 levels should improve. However, both PM10 and PM2.5 (smoke) levels may be somewhat elevated again this afternoon, depending on smoke from the Telegraph Fire.

Ozone will continue to be elevated as well. An Ozone High Pollution Advisory (HPA) is in effect today, and another one will be issued for Friday as well. However, by Saturday, stronger westerly winds are expected to help reduce ozone levels. Such winds will also be favorable for keeping smoke from the Telegraph Fire out of the Valley. These winds are forecast through at least Monday.

PM10 is forecast in the Moderate Air Quality Index (AQI) category on weekdays because of local production of PM10 in areas south of the Phoenix metro area.

- M. Graves
ADEQ Meteorologist


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