Hourly Weather | Today Wednesday, September 16, 2026
Active Weather Warnings
Tempe, Arizona
4 AM
Rainy Weather
82°
Feels Like 81°
60
Humidity: 59%
UV Index: 0
Wind: 6 mph
5 AM
Cloudy Night
82°
Feels Like 84°
49
Humidity: 64%
UV Index: 0
Wind: 6 mph
6 AM
Cloudy Night
81°
Feels Like 82°
49
Humidity: 65%
UV Index: 0
Wind: 6 mph
7 AM
Cloudy Weather
79°
Feels Like 81°
49
Humidity: 70%
UV Index: 1
Wind: 6 mph
8 AM
Sunny with a Chance of Thunderstorms
77°
Feels Like 79°
61
Humidity: 85%
UV Index: 1
Wind: 6 mph
9 AM
Cloudy Weather
81°
Feels Like 86°
49
Humidity: 75%
UV Index: 2
Wind: 7 mph
10 AM
Cloudy Weather
82°
Feels Like 90°
49
Humidity: 67%
UV Index: 3
Wind: 7 mph
11 AM
Sunny with a Chance of Thunderstorms
79°
Feels Like 84°
63
Humidity: 80%
UV Index: 2
Wind: 7 mph
12 PM
Cloudy Weather
84°
Feels Like 93°
49
Humidity: 67%
UV Index: 4
Wind: 7 mph
1 PM
Cloudy Weather
86°
Feels Like 93°
34
Humidity: 58%
UV Index: 3
Wind: 7 mph
2 PM
Cloudy Weather
88°
Feels Like 91°
34
Humidity: 51%
UV Index: 3
Wind: 7 mph
3 PM
Cloudy Weather
90°
Feels Like 93°
40
Humidity: 48%
UV Index: 2
Wind: 7 mph
4 PM
Sunny with a Chance of Thunderstorms
88°
Feels Like 90°
69
Humidity: 64%
UV Index: 1
Wind: 7 mph
5 PM
Cloudy Weather
84°
Feels Like 90°
49
Humidity: 68%
UV Index: 1
Wind: 7 mph
6 PM
Sunny with a Chance of Thunderstorms
81°
Feels Like 84°
69
Humidity: 80%
UV Index: 0
Wind: 7 mph
7 PM
Stormy Weather
79°
Feels Like 81°
59
Humidity: 85%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Weather
81°
Feels Like 82°
49
Humidity: 74%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Weather
81°
Feels Like 82°
49
Humidity: 71%
UV Index: 0
Wind: 6 mph
10 PM
Stormy Weather
79°
Feels Like 81°
59
Humidity: 79%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Weather
79°
Feels Like 82°
49
Humidity: 80%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

4 AM
24 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.11 µg/m³
  • PM10: 17.72 µg/m³
  • O3: 0.026 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 AM
23 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.34 µg/m³
  • PM10: 19.06 µg/m³
  • O3: 0.025 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 AM
23 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.43 µg/m³
  • PM10: 19.66 µg/m³
  • O3: 0.024 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 AM
22 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.36 µg/m³
  • PM10: 19.36 µg/m³
  • O3: 0.024 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 AM
22 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.15 µg/m³
  • PM10: 17.97 µg/m³
  • O3: 0.023 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 AM
22 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.79 µg/m³
  • PM10: 15.67 µg/m³
  • O3: 0.023 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 AM
22 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.99 µg/m³
  • PM10: 10.38 µg/m³
  • O3: 0.024 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 AM
23 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.54 µg/m³
  • PM10: 7.51 µg/m³
  • O3: 0.025 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

12 PM
24 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.4 µg/m³
  • PM10: 6.6 µg/m³
  • O3: 0.026 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

1 PM
25 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.13 µg/m³
  • PM10: 5.28 µg/m³
  • O3: 0.027 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

2 PM
26 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1 µg/m³
  • PM10: 4.27 µg/m³
  • O3: 0.028 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

3 PM
26 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.97 µg/m³
  • PM10: 3.82 µg/m³
  • O3: 0.028 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

4 PM
27 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.96 µg/m³
  • PM10: 3.6 µg/m³
  • O3: 0.029 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 PM
27 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.98 µg/m³
  • PM10: 3.65 µg/m³
  • O3: 0.029 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 PM
27 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.99 µg/m³
  • PM10: 3.76 µg/m³
  • O3: 0.029 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 PM
27 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.05 µg/m³
  • PM10: 4.34 µg/m³
  • O3: 0.029 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM
26 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.18 µg/m³
  • PM10: 5.43 µg/m³
  • O3: 0.029 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM
26 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.33 µg/m³
  • PM10: 6.56 µg/m³
  • O3: 0.028 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM
25 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.48 µg/m³
  • PM10: 7.63 µg/m³
  • O3: 0.027 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM
24 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.63 µg/m³
  • PM10: 8.56 µg/m³
  • O3: 0.026 ppm
  • NO2: 0.4 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Weather Alerts and Warnings for Tempe

Severe Future Possible

Flood Watch

Flood Watch issued September 16 at 12:45AM MST until September 16 at 11:00PM MST by NWS Phoenix AZ
Sep 16, 1:45 AM Sep 17, 12:00 AM
WHAT: Flash flooding caused by excessive rainfall will be
possible.

WHERE: A portion of south central Arizona, including all of
Maricopa County, Northern and Western Pinal County, and Southern
Gila County.

WHEN: Through this evening.

IMPACTS: Excessive runoff may result in flooding of rivers,
creeks, streams, normally dry washes, and other low-lying and
flood-prone locations.

ADDITIONAL DETAILS:
- The combination of abundant moisture and a weather system moving
into the region will support rounds of showers and thunderstorms
today through this evening. Moderate to heavy rainfall with
rainfall rates in excess of 1-2 inches per hour is expected with
most storms. Some areas will see training of storms leading to
high rainfall accumulations.
- http://www.weather.gov/safety/flood
+ Read More
You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
Updated: Sep 16, 3:39 AM Source: NWS Alert