Hourly Weather | Today Saturday, July 18, 2026
Tucson, Arizona
9 AM
Cloudy Weather
82°
Feels Like 90°
19
Humidity: 60%
UV Index: 4
Wind: 5 mph
10 AM
Cloudy Weather
84°
Feels Like 93°
19
Humidity: 51%
UV Index: 6
Wind: 5 mph
11 AM
Cloudy Weather
88°
Feels Like 99°
19
Humidity: 44%
UV Index: 10
Wind: 5 mph
12 PM
Cloudy Weather
90°
Feels Like 99°
17
Humidity: 40%
UV Index: 11
Wind: 6 mph
1 PM
Cloudy Weather
90°
Feels Like 99°
14
Humidity: 36%
UV Index: 11
Wind: 7 mph
2 PM
Cloudy Weather
91°
Feels Like 99°
14
Humidity: 33%
UV Index: 8
Wind: 7 mph
3 PM
Cloudy Weather
91°
Feels Like 93°
18
Humidity: 33%
UV Index: 4
Wind: 7 mph
4 PM
Cloudy Weather
90°
Feels Like 91°
47
Humidity: 34%
UV Index: 3
Wind: 7 mph
5 PM
Sunny with a Chance of Thunderstorms
88°
Feels Like 84°
51
Humidity: 39%
UV Index: 1
Wind: 7 mph
6 PM
Cloudy Weather
88°
Feels Like 86°
47
Humidity: 40%
UV Index: 1
Wind: 6 mph
7 PM
Cloudy Weather
86°
Feels Like 84°
0
Humidity: 42%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Night
82°
Feels Like 81°
0
Humidity: 46%
UV Index: 0
Wind: 5 mph
9 PM
Cloudy Night
82°
Feels Like 81°
0
Humidity: 47%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
82°
Feels Like 81°
0
Humidity: 47%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
82°
Feels Like 81°
0
Humidity: 48%
UV Index: 0
Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

9 AM
12 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 2.98 µg/m³
  • PM10: 13.08 µg/m³
  • O3: 0.011 ppm
  • NO2: 1.3 ppb
  • SO2: 0 ppb
  • CO: 0.09 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: 3.57 µg/m³
  • PM10: 15.78 µg/m³
  • O3: 0.024 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.07 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: 3.04 µg/m³
  • PM10: 12.02 µg/m³
  • O3: 0.025 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.85 µg/m³
  • PM10: 10.84 µg/m³
  • O3: 0.025 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.75 µg/m³
  • PM10: 10.19 µg/m³
  • O3: 0.025 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.58 µg/m³
  • PM10: 9.34 µg/m³
  • O3: 0.025 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.47 µg/m³
  • PM10: 8.93 µg/m³
  • O3: 0.025 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.47 µg/m³
  • PM10: 8.84 µg/m³
  • O3: 0.023 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.49 µg/m³
  • PM10: 8.91 µg/m³
  • O3: 0.022 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.47 µg/m³
  • PM10: 9.06 µg/m³
  • O3: 0.022 ppm
  • NO2: 0.5 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.45 µg/m³
  • PM10: 9.32 µg/m³
  • O3: 0.022 ppm
  • NO2: 0.8 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.42 µg/m³
  • PM10: 9.62 µg/m³
  • O3: 0.020 ppm
  • NO2: 1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.41 µg/m³
  • PM10: 10.04 µg/m³
  • O3: 0.018 ppm
  • NO2: 1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.42 µg/m³
  • PM10: 10.3 µg/m³
  • O3: 0.017 ppm
  • NO2: 1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.52 µg/m³
  • PM10: 10.74 µg/m³
  • O3: 0.016 ppm
  • NO2: 1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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