Today | Weather | Tuesday, August 25, 2026
Active Weather Warnings

Weather in Downey, California

04:22 PM
Now
Sunny Weather
97° F
Feels Like 97°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 4
Humidity 33 %
Today
Sunny Weather
Day 99°
Night 72°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Downey Weather Forecast Updated

22 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (August 25, 2025)
Cloudy Night

Day

90°

Night

66°

Wind

5 mph

Precipitation

1 %

Air Quality in Downey

NOW
73 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 22.71 µg/m³
PM10 38.52 µg/m³
O3 0.042 ppm
NO2 0.2 ppb
SO2 0.2 ppb
CO 0.10 ppm
NH3 0 µg/m³
NO 0.07 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.522.71 µg/m³
PM1038.52 µg/m³
O382.43 µg/m³
NO20.36 µg/m³
SO20.56 µg/m³
CO115.63 µg/m³
NH30 µg/m³
NO0.07 µg/m³

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