Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Friday Forecast:

Notice: Blowing dust possible

Ozone

54 AQI
Max 8-hr Avg: 56 ppb

PM10

75 AQI
24-hr Avg: 103 µg/m3

PM2.5

40 AQI
24-hr Avg: 9.7 µg/m3

Saturday Forecast:


Ozone

61 AQI
Max 8-hr Avg: 58 ppb

PM10

51 AQI
24-hr Avg: 55 µg/m3

PM2.5

37 AQI
24-hr Avg: 8.8 µg/m3

Sunday Forecast:


Ozone

67 AQI
Max 8-hr Avg: 60 ppb

PM10

44 AQI
24-hr Avg: 47 µg/m3

PM2.5

34 AQI
24-hr Avg: 8.2 µg/m3

Monday Forecast:


Ozone

84 AQI
Max 8-hr Avg: 65 ppb

PM10

59 AQI
24-hr Avg: 71 µg/m3

PM2.5

34 AQI
24-hr Avg: 8.2 µg/m3

Tuesday Forecast:


Ozone

80 AQI
Max 8-hr Avg: 64 ppb

PM10

60 AQI
24-hr Avg: 73 µg/m3

PM2.5

35 AQI
24-hr Avg: 8.4 µg/m3

Air Quality By Pollutant:

Pollutant
Friday
5/20/2022
Saturday
5/21/2022
Sunday
5/22/2022
Monday
5/23/2022
Tuesday
5/24/2022
O3
54
61
67
84
80
PM10
75
51
44
59
60
PM2.5
40
37
34
34
35
Pollutant
FRI
SAT
SUN
MON
TUE
O3
54
61
67
84
80
PM10
75
51
44
59
60
PM2.5
40
37
34
34
35
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

This morning (Friday), weather maps show that the jet stream has arrived in full force over the West. This has ultimately provoked the National Weather Service to issue Red Flag Warnings (i.e. critical fire weather conditions) across the Southwest because of the windy and dry weather. Today will be a windy day for the Valley, with afternoon wind speeds reaching up to 20-30 mph and higher gusts.

Given the strength of this afternoon's winds, blowing dust will be possible. Therefore, we've raised hourly forecast PM10 (dust) levels for the afternoon. PM10 levels will be highest for dust-prone areas, especially the typical industrial areas south/southwest of the Phoenix metro area. The good news, however, is that ozone levels will be limited today.

For most of the forecast period (Saturday through Monday), low pressure will be the dominating weather pattern over the West and Southwest. Weather-wise, each day, high temperatures will be held in the 90s; daytime winds will also be breezy, particularly over the weekend. Pockets of dust may be possible for dust-prone areas in the afternoons. Hourly forecast PM10 graphs reflect this. Ozone levels should also stay in the Moderate Air Quality Index (AQI) category, increasing more by Monday.

Then by Tuesday, the pattern over Arizona will begin to transition from low pressure to high pressure. Highs will approach the 100°F mark, and daytime breezes will increase out of the west. The air quality shouldn't change much from the previous day, though ozone may decrease slightly.

- M. Graves
ADEQ Meteorologist


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