Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Wednesday Forecast:


Ozone

54 AQI
Max 8-hr Avg: 56 ppb

PM10

46 AQI
24-hr Avg: 50 µg/m3

PM2.5

32 AQI
24-hr Avg: 7.7 µg/m3

Thursday Forecast:


Ozone

51 AQI
Max 8-hr Avg: 55 ppb

PM10

44 AQI
24-hr Avg: 48 µg/m3

PM2.5

30 AQI
24-hr Avg: 7.1 µg/m3

Friday Forecast:


Ozone

58 AQI
Max 8-hr Avg: 57 ppb

PM10

45 AQI
24-hr Avg: 49 µg/m3

PM2.5

32 AQI
24-hr Avg: 7.7 µg/m3

Saturday Forecast:


Ozone

54 AQI
Max 8-hr Avg: 56 ppb

PM10

34 AQI
24-hr Avg: 37 µg/m3

PM2.5

35 AQI
24-hr Avg: 8.5 µg/m3

Sunday Forecast:


Ozone

58 AQI
Max 8-hr Avg: 57 ppb

PM10

32 AQI
24-hr Avg: 35 µg/m3

PM2.5

34 AQI
24-hr Avg: 8.2 µg/m3

Air Quality By Pollutant:

Pollutant
Wednesday
4/1/2020
Thursday
4/2/2020
Friday
4/3/2020
Saturday
4/4/2020
Sunday
4/5/2020
O3
54
51
58
54
58
PM10
46
44
45
34
32
PM2.5
32
30
32
35
34
Pollutant
WED
THU
FRI
SAT
SUN
O3
54
51
58
54
58
PM10
46
44
45
34
32
PM2.5
32
30
32
35
34
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

Yesterday, ozone was able to reach the low end of the Moderate Air Quality Index (AQI) category at two monitors in the northeast part of the Valley: Pinnacle Peak and Fountain Hills. This was actually around normal for this time of year. Cloud cover helped to limit ozone levels, but light winds were favorable for ozone build-up.

This morning, satellite still shows some clouds over Arizona, but cloud cover should gradually decrease as the day moves on. High temperatures should thus be able to finally reach into the 80s, which they were prevented from doing yesterday because of the clouds. In fact, the rest of this week is expected to be warm and sunny. Afternoon breezes will be periodic, too.

For ozone this week, sunny skies will be favorable for local ozone production. Therefore, ozone is forecast in the Moderate AQI category each day. However, breezes in the afternoon will help to limit ozone levels. We'll continue to watch ozone trends this week and make adjustments when necessary.

No issues are expected with either PM10 (dust) or PM2.5 (smoke), save for elevated levels in areas south/southwest of the Phoenix metro area on weekday mornings (hourly forecast graphs reflect this).

- M. Graves
ADEQ Meteorologist


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Thursday: Yellow
Friday: Yellow

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