Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Tuesday Forecast:


Ozone

51 AQI
Max 8-hr Avg: 55 ppb

PM10

41 AQI
24-hr Avg: 44 µg/m3

PM2.5

36 AQI
24-hr Avg: 8.7 µg/m3

Wednesday Forecast:


Ozone

54 AQI
Max 8-hr Avg: 56 ppb

PM10

40 AQI
24-hr Avg: 43 µg/m3

PM2.5

35 AQI
24-hr Avg: 8.5 µg/m3

Thursday Forecast:


Ozone

50 AQI
Max 8-hr Avg: 54 ppb

PM10

38 AQI
24-hr Avg: 41 µg/m3

PM2.5

30 AQI
24-hr Avg: 7.3 µg/m3

Friday Forecast:


Ozone

58 AQI
Max 8-hr Avg: 57 ppb

PM10

44 AQI
24-hr Avg: 47 µg/m3

PM2.5

35 AQI
24-hr Avg: 8.5 µg/m3

Saturday Forecast:


Ozone

54 AQI
Max 8-hr Avg: 56 ppb

PM10

33 AQI
24-hr Avg: 36 µg/m3

PM2.5

34 AQI
24-hr Avg: 8.2 µg/m3

Air Quality By Pollutant:

Pollutant
Tuesday
3/31/2020
Wednesday
4/1/2020
Thursday
4/2/2020
Friday
4/3/2020
Saturday
4/4/2020
O3
51
54
50
58
54
PM10
41
40
38
44
33
PM2.5
36
35
30
35
34
Pollutant
TUE
WED
THU
FRI
SAT
O3
51
54
50
58
54
PM10
41
40
38
44
33
PM2.5
36
35
30
35
34
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

Satellite imagery this morning (and just looking out the window) reveals clouds moving over the Valley. Skies are expected to be cloudy throughout the day. But despite the cloud cover, high temperatures this afternoon are still forecast to climb into the 80s. Winds will also be mostly light.

In regards to ozone, the cloud cover will help to limit local ozone production, since ozone needs sunlight to form; but light winds will be favorable for some accumulation. In all, ozone is forecast in the low end of the Moderate Air Quality Index (AQI) category today. Highest ozone levels are expected in the northeast area of the Valley.

Looking ahead, high pressure over Arizona today will give way for a more active weather pattern for the rest of the period. Relatively weak waves will swing over the state intermittently over the next several days, generally resulting in increased afternoon breezes. Winds look to be breezy and out of the west-southwest on Wednesday and Thursday, particularly Thursday. Winds then calm down on Friday before picking back up out of the southwest on Saturday.

Air quality-wise, this week, our focus will be ozone, as it will have the potential to reach the Moderate AQI category most days. But day-to-day variation in ozone will depend on clouds and winds. We'll continue to watch ozone trends closely. But in general, highest ozone levels are still expected to occur in northeast areas of the Valley.

In regards to particulates, both PM10 (dust) and PM2.5 (smoke) will likely continue to be locally elevated in the typical areas south/southwest of the Phoenix metro area in the mornings. However, they are forecast to remain in the Good AQI category.

- M. Graves
ADEQ Meteorologist


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Wednesday: Yellow
Thursday: Green

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