Hourly Weather | Today Tuesday, August 25, 2026
Active Weather Warnings
Downey, California
6 PM
Sunny Weather
90°
Feels Like 90°
0
Humidity: 38%
UV Index: 2
Wind: 8 mph
7 PM
Sunny Weather
88°
Feels Like 86°
0
Humidity: 43%
UV Index: 1
Wind: 7 mph
8 PM
Cloudy Night
84°
Feels Like 84°
0
Humidity: 51%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
81°
Feels Like 81°
0
Humidity: 58%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
79°
Feels Like 79°
0
Humidity: 65%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
79°
Feels Like 79°
0
Humidity: 68%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

6 PM
67 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 20.16 µg/m³
  • PM10: 36.6 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 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.

7 PM
62 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 17.84 µg/m³
  • PM10: 34.14 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

8 PM
57 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 15.05 µg/m³
  • PM10: 31.3 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

9 PM
52 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.94 µg/m³
  • PM10: 29.09 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

10 PM
48 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.56 µg/m³
  • PM10: 27.53 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

11 PM
44 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 10.68 µg/m³
  • PM10: 26.34 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 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 Downey

Severe Future Likely

Extreme Heat Watch

Extreme Heat Watch issued August 23 at 12:06AM PDT until August 28 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
Aug 25, 10:00 AM Aug 28, 8:00 PM
WHAT: For the Heat Advisory, temperatures up to 94 expected. For
the Extreme Heat Watch, dangerously hot conditions with
temperatures up to 100 possible.

WHERE: Catalina and Santa Barbara Islands, Los Angeles County
Beaches, Los Angeles County Inland Coast including Downtown Los
Angeles, Malibu Coast, Palos Verdes Hills, Santa Barbara County
Southeastern Coast, Santa Barbara County Southwestern Coast,
Ventura County Beaches, and Ventura County Inland Coast.

WHEN: For the Heat Advisory, from 10 AM this morning to 10 AM PDT
Tuesday. For the Extreme Heat Watch, from Tuesday morning through
Friday evening.

IMPACTS: Heat related illnesses increase significantly during
extreme heat events. 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: Aug 24, 12:43 PM Source: NWS Alert
Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued August 25 at 10:42AM PDT until August 28 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
Aug 25, 10:42 AM Aug 28, 8:00 PM
WHAT: Dangerously hot conditions with temperatures up to 102.

WHERE: Catalina and Santa Barbara Islands, Los Angeles County
Beaches, Los Angeles County Inland Coast including Downtown Los
Angeles, Malibu Coast, Palos Verdes Hills, Santa Barbara County
Southeastern Coast, Santa Barbara County Southwestern Coast,
Ventura County Beaches, and Ventura County Inland Coast.

WHEN: Until 8 PM PDT Friday.

IMPACTS: Heat related illnesses increase significantly during
extreme heat events.
+ 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: Aug 25, 3:59 PM Source: NWS Alert

Air Quality Alert

Air Quality Alert issued August 25 at 6:39AM PDT by NWS Los Angeles/Oxnard CA
Aug 25, 6:39 AM Aug 28, 8:00 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 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: from 1 PM Monday to 8 PM Friday. 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: Aug 25, 3:59 PM Source: NWS Alert