Hourly Weather | Today Thursday, July 23, 2026
Active Weather Warnings
Mission Viejo, California
6 AM
Cloudy Weather
68°
Feels Like 68°
0
Humidity: 84%
UV Index: 0
Wind: 4 mph
7 AM
Cloudy Weather
72°
Feels Like 73°
0
Humidity: 77%
UV Index: 1
Wind: 4 mph
8 AM
Cloudy Weather
73°
Feels Like 75°
0
Humidity: 72%
UV Index: 1
Wind: 4 mph
9 AM
Cloudy Weather
79°
Feels Like 81°
0
Humidity: 63%
UV Index: 2
Wind: 5 mph
10 AM
Cloudy Weather
81°
Feels Like 88°
0
Humidity: 57%
UV Index: 5
Wind: 6 mph
11 AM
Cloudy Weather
84°
Feels Like 93°
0
Humidity: 52%
UV Index: 8
Wind: 7 mph
12 PM
Sunny Weather
88°
Feels Like 97°
0
Humidity: 48%
UV Index: 10
Wind: 7 mph
1 PM
Sunny Weather
88°
Feels Like 97°
0
Humidity: 46%
UV Index: 11
Wind: 8 mph
2 PM
Cloudy Weather
90°
Feels Like 99°
0
Humidity: 45%
UV Index: 10
Wind: 8 mph
3 PM
Cloudy Weather
90°
Feels Like 97°
0
Humidity: 43%
UV Index: 8
Wind: 9 mph
4 PM
Sunny Weather
90°
Feels Like 93°
0
Humidity: 43%
UV Index: 5
Wind: 8 mph
5 PM
Cloudy Weather
88°
Feels Like 90°
0
Humidity: 44%
UV Index: 3
Wind: 8 mph
6 PM
Cloudy Weather
86°
Feels Like 88°
0
Humidity: 46%
UV Index: 2
Wind: 7 mph
7 PM
Cloudy Weather
84°
Feels Like 84°
0
Humidity: 50%
UV Index: 1
Wind: 7 mph
8 PM
Cloudy Night
81°
Feels Like 79°
0
Humidity: 58%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
77°
Feels Like 77°
0
Humidity: 64%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
73°
Feels Like 73°
0
Humidity: 72%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
72°
Feels Like 72°
0
Humidity: 78%
UV Index: 0
Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 6.22 µg/m³
  • PM10: 24.15 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.43 µg/m³
  • PM10: 24.91 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.67 µg/m³
  • PM10: 25.82 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.84 µg/m³
  • PM10: 26.39 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.97 µg/m³
  • PM10: 26.66 µg/m³
  • O3: 0.037 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.13 µg/m³
  • PM10: 26.72 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.34 µg/m³
  • PM10: 26.77 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.52 µg/m³
  • PM10: 26.88 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.59 µg/m³
  • PM10: 26.96 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.54 µg/m³
  • PM10: 27.13 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.33 µg/m³
  • PM10: 27.14 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7 µg/m³
  • PM10: 26.76 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.6 µg/m³
  • PM10: 25.95 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.21 µg/m³
  • PM10: 24.81 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.99 µg/m³
  • PM10: 24.04 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.96 µg/m³
  • PM10: 23.81 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.01 µg/m³
  • PM10: 23.9 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.02 µg/m³
  • PM10: 23.78 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

Weather Alerts and Warnings for Mission Viejo

Moderate Expected Likely

Heat Advisory

Heat Advisory issued July 22 at 9:01PM PDT until July 27 at 8:00PM PDT by NWS San Diego CA
Jul 22, 9:01 PM Jul 27, 8:00 PM
WHAT: High temperatures in the 90s and low temperatures in the
upper 60s and lower 70s expected.

WHERE: Orange County Inland Areas.

WHEN: Until 8 PM PDT Monday.

IMPACTS: Hot temperatures may cause heat illnesses.
+ Read More
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Updated: Jul 23, 5:53 AM Source: NWS Alert

Air Quality Alert

Air Quality Alert issued July 22 at 5:41PM PDT by NWS San Diego CA
Jul 22, 5:41 PM Jul 23, 5:45 PM
WHAT: The South Coast AQMD has issued an air quality alert due to
harmful levels of ozone pollution.
Visit https://www.aqmd.gov/alertinfo to check current and forecasted
air quality levels.

WHERE: in the South Coast Air Basin and Coachella Valley. Levels
of ozone pollution can vary by time and location depending on
emissions and air pollution transport.

WHEN: until 8 PM Monday. The highest ozone levels typically occur
in the afternoon and early-evening hours.

IMPACTS: Ozone air pollution can cause serious health problems,
including trouble breathing, asthma attacks, and lung damage.
Everyone can be affected, but sensitive groups such as people with
lung disease, older adults, people who are pregnant, children, and
those who spend a lot of time outdoors are at greater risk.
+ Read More
To protect your health, check air quality levels and act as needed: * When Air Quality Index (AQI) levels are "Unhealthy for Sensitive Groups" (orange), sensitive groups as specified above should limit extended or intense outdoor activity. * When AQI is "Unhealthy" (red), everyone may experience health impacts. Sensitive groups should avoid extended time outdoors. * When AQI is "Very Unhealthy" (purple), sensitive groups should avoid all outdoor physical activity. Everyone else should avoid extended or intense outdoor activity. * When AQI is "Hazardous" (maroon), everyone should avoid all outdoor physical activity. * ADDITIONAL DETAILS... To help keep indoor air clean when air quality is poor: * Keep windows and doors closed * Run your air conditioner and/or an air purifier * Do not use whole house fans or swamp coolers that bring in outside air if you have other methods to stay cool * Avoid other sources of pollution such as fireplaces, candles, incense, and grilling To help minimize outdoor ozone air pollution levels: * Limit the use of gasoline powered lawn and garden equipment until evening hours * Try to delay trips to the gas station and the use of household chemicals until the evening
Updated: Jul 23, 5:53 AM Source: NWS Alert