Hourly Weather | Today Wednesday, December 24, 2025
Active Weather Warnings
El Cajon, California
11 AM
Cloudy Weather
68°
Feels Like 64°
47
Humidity: 80%
Wind: 15 mph
UV Index: 1
12 PM
Rainy Weather
70°
Feels Like 63°
51
Humidity: 77%
Wind: 16 mph
UV Index: 1
1 PM
Cloudy Weather
66°
Feels Like 64°
49
Humidity: 73%
Wind: 16 mph
UV Index: 1
2 PM
Rainy Weather
64°
Feels Like 57°
70
Humidity: 84%
Wind: 14 mph
UV Index: 0
3 PM
Rainy Weather
64°
Feels Like 55°
75
Humidity: 85%
Wind: 9 mph
UV Index: 0
4 PM
Rainy Weather
63°
Feels Like 55°
70
Humidity: 93%
Wind: 7 mph
UV Index: 0
5 PM
Rainy Weather
61°
Feels Like 55°
70
Humidity: 93%
Wind: 6 mph
UV Index: 0
6 PM
Cloudy Weather
61°
Feels Like 61°
49
Humidity: 90%
Wind: 6 mph
UV Index: 0
7 PM
Cloudy Weather
63°
Feels Like 63°
49
Humidity: 88%
Wind: 6 mph
UV Index: 0
8 PM
Rainy Weather
64°
Feels Like 61°
79
Humidity: 87%
Wind: 6 mph
UV Index: 0
9 PM
Rainy Weather
63°
Feels Like 61°
71
Humidity: 87%
Wind: 6 mph
UV Index: 0
10 PM
Rainy Weather
63°
Feels Like 59°
63
Humidity: 88%
Wind: 6 mph
UV Index: 0
11 PM
Cloudy Weather
63°
Feels Like 63°
49
Humidity: 87%
Wind: 6 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 3.97 µg/m³
  • PM10: 10.58 µg/m³
  • O3: 0.031 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.23 µg/m³
  • PM10: 9.62 µg/m³
  • O3: 0.033 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.35 µg/m³
  • PM10: 8.74 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.06 µg/m³
  • PM10: 6.96 µg/m³
  • O3: 0.037 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.71 µg/m³
  • PM10: 5.77 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.4 µg/m³
  • PM10: 5.06 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.05 µg/m³
  • PM10: 4.53 µg/m³
  • O3: 0.034 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.83 µg/m³
  • PM10: 4.27 µg/m³
  • O3: 0.034 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.63 µg/m³
  • PM10: 4 µg/m³
  • O3: 0.033 ppm
  • NO2: 0.2 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
30 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.66 µg/m³
  • PM10: 4.18 µg/m³
  • O3: 0.033 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.82 µg/m³
  • PM10: 4.37 µg/m³
  • O3: 0.033 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.89 µg/m³
  • PM10: 4.27 µg/m³
  • O3: 0.032 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.87 µg/m³
  • PM10: 4.21 µg/m³
  • O3: 0.032 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

Weather Alerts and Warnings for El Cajon

Severe Future Possible

Flood Watch

Flood Watch issued December 24 at 5:49AM PST until December 25 at 1:00AM PST by NWS San Diego CA
Dec 24, 5:49 AM Dec 25, 1:00 AM
WHAT: Flooding caused by excessive rainfall continues to be
possible.

WHERE: A portion of Southwest California, including the following
areas, San Diego County Coastal Areas, San Diego County Deserts,
San Diego County Mountains and San Diego County Valleys.

WHEN: Through late tonight.

IMPACTS: Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas.

ADDITIONAL DETAILS:
- An Atmospheric River will likely bring widespread moderate to
heavy rain to the area today. Heaviest most widespread rain
is expected late this morning continuing through the evening.
Peak rainfall rates of 0.50 to 1 inch per hour are expected.
There is a potential for locally heavier hourly rainfall
rates to develop with convection embedded in the main rain
band or in thunderstorms after the main band passes. Isolated
heavy showers could continue into Thursday but impacts from
any additional rain are expected to be more localized.
- https://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: Dec 24, 9:03 AM Source: NWS Alert
Moderate Expected Likely

Wind Advisory

Wind Advisory issued December 24 at 2:21AM PST until December 24 at 10:00PM PST by NWS San Diego CA
Dec 24, 3:00 AM Dec 24, 10:00 PM
WHAT: South winds 20 to 30 mph with gusts to 45 mph expected.

WHERE: Orange County Coastal Areas, Orange County Inland Areas,
San Bernardino and Riverside County Valleys-The Inland Empire, San
Diego County Coastal Areas, San Diego County Valleys, and Santa
Ana Mountains and Foothills.

WHEN: Until 10 PM PST this evening.

IMPACTS: Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.

ADDITIONAL DETAILS: Strongest winds for Orange County and the
Inland Empire will be in the morning to early afternoon. Strongest
winds for San Diego county will be mid to late morning into the
evening.
+ Read More
Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.
Updated: Dec 24, 9:03 AM Source: NWS Alert