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Hourly Weather | Today › Wednesday, September 9, 2026
Active Weather Warnings
El Monte, California
7 PM
Cloudy Weather
99°
Feels Like 100°
5
Humidity: 33%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Night
95°
Feels Like 97°
0
Humidity: 37%
UV Index: 0
Wind: 5 mph
9 PM
Cloudy Night
91°
Feels Like 91°
0
Humidity: 43%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
90°
Feels Like 90°
0
Humidity: 47%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
86°
Feels Like 88°
0
Humidity: 52%
UV Index: 0
Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 17.22 µg/m³
  • PM10: 33.8 µg/m³
  • O3: 0.068 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 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.

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

Pollutant Concentrations:

  • PM2.5: 18.44 µg/m³
  • PM10: 36.09 µg/m³
  • O3: 0.070 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 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.

9 PM
110 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 19.49 µg/m³
  • PM10: 36.87 µg/m³
  • O3: 0.073 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

10 PM
122 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 21.17 µg/m³
  • PM10: 39.03 µg/m³
  • O3: 0.076 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

11 PM
133 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 23.13 µg/m³
  • PM10: 42.06 µg/m³
  • O3: 0.080 ppm
  • NO2: 0.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

Current Real-Time Air Quality Report

Weather Alerts and Warnings for El Monte

Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued September 9 at 8:09AM PDT until September 10 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
Sep 9, 8:09 AM → Sep 10, 8:00 PM
WHAT: Temperatures between 92 and 108 expected.

WHERE: Calabasas and Agoura Hills, Eastern San Fernando Valley,
Eastern Santa Monica Mountains Recreational Area, Los Angeles
County Beaches, Los Angeles County Inland Coast including Downtown
Los Angeles, Los Angeles County San Gabriel Valley, Malibu Coast,
Palos Verdes Hills, Western San Fernando Valley, and Western Santa
Monica Mountains Recreational Area.

WHEN: Until 8 PM PDT Thursday.

IMPACTS: Heat related illnesses increase significantly during
extreme heat events. Hot temperatures may cause heat illnesses.

ADDITIONAL DETAILS: Humid conditions will add to heat discomfort.
Heat peaking today for most areas.
+ Read More
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Stay cool, stay hydrated, stay informed.
Updated: Sep 9, 4:53 PM Source: NWS Alert
Moderate Expected Likely

Heat Advisory

Heat Advisory issued September 8 at 2:10AM PDT until September 10 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
Sep 8, 10:00 AM → Sep 10, 8:00 PM
WHAT: Temperatures between 85 and 105 expected. 10 to 15 degrees
above normal.

WHERE: Calabasas and Agoura Hills, Eastern San Fernando Valley,
Eastern Santa Monica Mountains Recreational Area, Los Angeles
County Beaches, Los Angeles County Inland Coast including Downtown
Los Angeles, Los Angeles County San Gabriel Valley, Malibu Coast,
Palos Verdes Hills, Western San Fernando Valley, and Western Santa
Monica Mountains Recreational Area

WHEN: From 10 AM this morning to 8 PM PDT Thursday.

IMPACTS: Hot temperatures may cause heat illnesses.

ADDITIONAL DETAILS: Humid conditions will add to heat discomfort.
Heat peaking on Wednesday for most areas. Chance for Heat
Advisories to be extended into Friday.
+ 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: Sep 8, 9:59 AM Source: NWS Alert

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