Hourly Weather | Today Tuesday, July 21, 2026
Livermore, California
2 AM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 58%
UV Index: 0
Wind: 6 mph
3 AM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 63%
UV Index: 0
Wind: 6 mph
4 AM
Cloudy Night
64°
Feels Like 63°
0
Humidity: 65%
UV Index: 0
Wind: 6 mph
5 AM
Cloudy Night
64°
Feels Like 64°
0
Humidity: 67%
UV Index: 0
Wind: 6 mph
6 AM
Cloudy Night
64°
Feels Like 63°
0
Humidity: 69%
UV Index: 0
Wind: 6 mph
7 AM
Cloudy Weather
66°
Feels Like 66°
0
Humidity: 61%
UV Index: 1
Wind: 5 mph
8 AM
Cloudy Weather
73°
Feels Like 73°
0
Humidity: 50%
UV Index: 2
Wind: 5 mph
9 AM
Cloudy Weather
79°
Feels Like 81°
0
Humidity: 41%
UV Index: 3
Wind: 5 mph
10 AM
Cloudy Weather
82°
Feels Like 88°
0
Humidity: 33%
UV Index: 5
Wind: 6 mph
11 AM
Cloudy Weather
88°
Feels Like 93°
0
Humidity: 26%
UV Index: 7
Wind: 7 mph
12 PM
Cloudy Weather
91°
Feels Like 99°
0
Humidity: 22%
UV Index: 10
Wind: 8 mph
1 PM
Cloudy Weather
95°
Feels Like 100°
0
Humidity: 20%
UV Index: 11
Wind: 10 mph
2 PM
Cloudy Weather
97°
Feels Like 100°
0
Humidity: 19%
UV Index: 10
Wind: 12 mph
3 PM
Cloudy Weather
100°
Feels Like 100°
0
Humidity: 18%
UV Index: 7
Wind: 13 mph
4 PM
Cloudy Weather
99°
Feels Like 99°
0
Humidity: 19%
UV Index: 5
Wind: 14 mph
5 PM
Cloudy Weather
97°
Feels Like 97°
0
Humidity: 20%
UV Index: 3
Wind: 14 mph
6 PM
Cloudy Weather
93°
Feels Like 91°
0
Humidity: 22%
UV Index: 2
Wind: 13 mph
7 PM
Cloudy Weather
91°
Feels Like 90°
0
Humidity: 24%
UV Index: 1
Wind: 12 mph
8 PM
Sunny Weather
88°
Feels Like 84°
0
Humidity: 27%
UV Index: 0
Wind: 10 mph
9 PM
Night
84°
Feels Like 81°
0
Humidity: 32%
UV Index: 0
Wind: 9 mph
10 PM
Night
81°
Feels Like 79°
0
Humidity: 36%
UV Index: 0
Wind: 8 mph
11 PM
Night
79°
Feels Like 75°
0
Humidity: 40%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

2 AM
29 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.63 µg/m³
  • PM10: 12.57 µg/m³
  • O3: 0.031 ppm
  • NO2: 1.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

3 AM
28 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.72 µg/m³
  • PM10: 12.76 µg/m³
  • O3: 0.030 ppm
  • NO2: 1.8 ppb
  • SO2: 0.4 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.83 µg/m³
  • PM10: 13.01 µg/m³
  • O3: 0.029 ppm
  • NO2: 1.8 ppb
  • SO2: 0.4 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.95 µg/m³
  • PM10: 13.26 µg/m³
  • O3: 0.029 ppm
  • NO2: 1.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.06 µg/m³
  • PM10: 13.46 µg/m³
  • O3: 0.028 ppm
  • NO2: 2 ppb
  • SO2: 0.5 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

7 AM
26 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.13 µg/m³
  • PM10: 13.52 µg/m³
  • O3: 0.027 ppm
  • NO2: 2.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

8 AM
26 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.17 µg/m³
  • PM10: 13.39 µg/m³
  • O3: 0.028 ppm
  • NO2: 2.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.31 µg/m³
  • PM10: 13.23 µg/m³
  • O3: 0.029 ppm
  • NO2: 1.9 ppb
  • SO2: 0.6 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.63 µg/m³
  • PM10: 13.33 µg/m³
  • O3: 0.033 ppm
  • NO2: 1.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.51 µg/m³
  • PM10: 14.24 µg/m³
  • O3: 0.039 ppm
  • NO2: 1.5 ppb
  • SO2: 0.7 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.09 µg/m³
  • PM10: 15.87 µg/m³
  • O3: 0.046 ppm
  • NO2: 1 ppb
  • SO2: 0.7 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.71 µg/m³
  • PM10: 17.15 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.7 ppb
  • SO2: 0.7 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

2 PM
65 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 11.95 µg/m³
  • PM10: 17.9 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.5 ppb
  • SO2: 0.7 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

3 PM
78 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 12.34 µg/m³
  • PM10: 17.71 µg/m³
  • O3: 0.063 ppm
  • NO2: 0.4 ppb
  • SO2: 0.7 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

4 PM
84 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 12.19 µg/m³
  • PM10: 16.94 µg/m³
  • O3: 0.065 ppm
  • NO2: 0.3 ppb
  • SO2: 0.7 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

5 PM
90 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 12.11 µg/m³
  • PM10: 16.34 µg/m³
  • O3: 0.067 ppm
  • NO2: 0.4 ppb
  • SO2: 0.7 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

6 PM
92 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 11.85 µg/m³
  • PM10: 15.57 µg/m³
  • O3: 0.067 ppm
  • NO2: 0.5 ppb
  • SO2: 0.7 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

7 PM
85 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.93 µg/m³
  • PM10: 14.26 µg/m³
  • O3: 0.065 ppm
  • NO2: 0.7 ppb
  • SO2: 0.6 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

8 PM
71 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.67 µg/m³
  • PM10: 12.92 µg/m³
  • O3: 0.061 ppm
  • NO2: 0.9 ppb
  • SO2: 0.6 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

9 PM
58 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.81 µg/m³
  • PM10: 12.21 µg/m³
  • O3: 0.057 ppm
  • NO2: 1 ppb
  • SO2: 0.5 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

10 PM
51 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.66 µg/m³
  • PM10: 12.14 µg/m³
  • O3: 0.054 ppm
  • NO2: 1.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

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

Pollutant Concentrations:

  • PM2.5: 8.89 µg/m³
  • PM10: 12.36 µg/m³
  • O3: 0.053 ppm
  • NO2: 1.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.10 ppm

Health Recommendations:

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