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Today Hourly 7 days 30 days Air Quality
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Hourly Weather | Today › Thursday, December 4, 2025
Active Weather Warnings
Chula Vista, California
3 AM
Cloudy Night
52°
Feels Like 52°
0
Humidity: 55%
Wind: 5 mph
UV Index: 0
4 AM
Cloudy Night
50°
Feels Like 48°
0
Humidity: 59%
Wind: 5 mph
UV Index: 0
5 AM
Cloudy Night
48°
Feels Like 46°
0
Humidity: 60%
Wind: 5 mph
UV Index: 0
6 AM
Cloudy Night
46°
Feels Like 45°
0
Humidity: 62%
Wind: 5 mph
UV Index: 0
7 AM
Cloudy Weather
48°
Feels Like 48°
0
Humidity: 56%
Wind: 5 mph
UV Index: 0
8 AM
Cloudy Weather
54°
Feels Like 55°
0
Humidity: 45%
Wind: 6 mph
UV Index: 1
9 AM
Cloudy Weather
61°
Feels Like 63°
0
Humidity: 37%
Wind: 6 mph
UV Index: 2
10 AM
Cloudy Weather
64°
Feels Like 66°
0
Humidity: 31%
Wind: 6 mph
UV Index: 2
11 AM
Cloudy Weather
68°
Feels Like 70°
0
Humidity: 28%
Wind: 7 mph
UV Index: 3
12 PM
Cloudy Weather
70°
Feels Like 72°
0
Humidity: 26%
Wind: 7 mph
UV Index: 3
1 PM
Cloudy Weather
72°
Feels Like 72°
0
Humidity: 26%
Wind: 8 mph
UV Index: 3
2 PM
Cloudy Weather
72°
Feels Like 73°
0
Humidity: 26%
Wind: 8 mph
UV Index: 2
3 PM
Cloudy Weather
70°
Feels Like 70°
0
Humidity: 29%
Wind: 9 mph
UV Index: 2
4 PM
Cloudy Weather
68°
Feels Like 66°
0
Humidity: 34%
Wind: 8 mph
UV Index: 1
5 PM
Cloudy Night
64°
Feels Like 63°
0
Humidity: 41%
Wind: 7 mph
UV Index: 0
6 PM
Cloudy Night
61°
Feels Like 61°
0
Humidity: 47%
Wind: 6 mph
UV Index: 0
7 PM
Night
57°
Feels Like 57°
0
Humidity: 54%
Wind: 5 mph
UV Index: 0
8 PM
Cloudy Night
55°
Feels Like 55°
0
Humidity: 58%
Wind: 5 mph
UV Index: 0
9 PM
Cloudy Night
54°
Feels Like 52°
0
Humidity: 59%
Wind: 5 mph
UV Index: 0
10 PM
Cloudy Night
52°
Feels Like 50°
0
Humidity: 59%
Wind: 5 mph
UV Index: 0
11 PM
Cloudy Night
52°
Feels Like 50°
0
Humidity: 58%
Wind: 5 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

3 AM
52 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.77 µg/m³
  • PM10: 22.23 µg/m³
  • O3: 0.054 ppm
  • NO2: 0.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

4 AM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.57 µg/m³
  • PM10: 22.01 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

5 AM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.33 µg/m³
  • PM10: 21.46 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

6 AM
50 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12 µg/m³
  • PM10: 20.86 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 11.6 µg/m³
  • PM10: 20.12 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.99 µg/m³
  • PM10: 19.09 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.3 µg/m³
  • PM10: 18.02 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.74 µg/m³
  • PM10: 17.16 µg/m³
  • O3: 0.054 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

11 AM
52 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.51 µg/m³
  • PM10: 16.76 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

12 PM
54 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.62 µg/m³
  • PM10: 16.93 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

1 PM
56 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.61 µg/m³
  • PM10: 17.11 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.59 µg/m³
  • PM10: 17.36 µg/m³
  • O3: 0.057 ppm
  • NO2: 0.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.71 µg/m³
  • PM10: 17.66 µg/m³
  • O3: 0.057 ppm
  • NO2: 0.8 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.64 µg/m³
  • PM10: 17.7 µg/m³
  • O3: 0.058 ppm
  • NO2: 1 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.23 µg/m³
  • PM10: 17.32 µg/m³
  • O3: 0.057 ppm
  • NO2: 1 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.93 µg/m³
  • PM10: 17.09 µg/m³
  • O3: 0.057 ppm
  • NO2: 0.9 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.84 µg/m³
  • PM10: 17.07 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.9 µg/m³
  • PM10: 17.17 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.26 µg/m³
  • PM10: 17.68 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.95 µg/m³
  • PM10: 18.66 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

11 PM
53 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.74 µg/m³
  • PM10: 19.86 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Chula Vista

Moderate Expected Likely

Beach Hazards Statement

Beach Hazards Statement issued December 4 at 1:14AM PST until December 5 at 10:00AM PST by NWS San Diego CA
Dec 4, 1:14 AM → Dec 5, 10:00 AM
WHAT: Very high astronomical tides during the mornings combined
with elevated surf up to 5 feet, primarily at west-facing
beaches today, will result in minor tidal overflow and local
beach flooding.

WHERE: San Diego County Coastal Areas and Orange County
Coastal Areas.

WHEN: Through Friday morning.

IMPACTS: Minor tidal overflow, beach flooding, and coastal
erosion most likely during times of high tides. Hazardous
swimming conditions.

ADDITIONAL DETAILS: Predicted high tides at La Jolla: 7.1 feet
at 734 AM today, and 7.1 feet at 818 AM Friday.
+ Read More
A beach hazards statement for minor tidal overflow means that high astronomical tides, especially in combination with above normal surf, will likely produce minor flooding of low-lying areas along the beach such as beach parking lots. Coastal officials should take the necessary precautionary measures to safeguard their beaches. Inexperienced swimmers should remain out of the water to avoid hazardous swimming conditions.
Updated: Dec 4, 1:23 AM Source: NWS Alert