Today | Weather | Thursday, June 25, 2026

Active Weather Warnings

Weather in Norwalk, California

08:18 PM

Now

72° F

Feels Like 70°

Precipitation 0 %

Wind 7 mph

UV Index (0 - 11+) 0

Humidity 58 %

Today

Day 81°

Night 63°

Precipitation 1 %

Wind 6 mph

UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Norwalk Weather Forecast Updated

Last updated on June 25, 2026 at 6:58 PM

Weather Forecast History

Last Year's Weather on This Day (June 25, 2025)

Day

81°

Night

63°

Wind

6 mph

UV Index

Precipitation

0 %

Air Quality in Norwalk

NOW

39 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 2.57 µg/m³

PM₁₀ 6.25 µg/m³

O₃ 0.042 ppm

NO₂ 0.1 ppb

SO₂ 0.2 ppb

CO 0.07 ppm

NH₃ 0 µg/m³

NO 0 µg/m³

PM_2.5 – 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 considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 2.57 µg/m³

PM₁₀ – 6.25 µg/m³

O₃ – 82.69 µg/m³

NO₂ – 0.22 µg/m³

SO₂ – 0.44 µg/m³

CO – 79.86 µg/m³

NH₃ – 0 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Norwalk

Severe Future Likely

Extreme Heat Watch

Extreme Heat Watch issued June 19 at 8:08PM PDT until June 25 at 9:00PM PDT by NWS Los Angeles/Oxnard CA

Jun 23, 8:00 AM → Jun 25, 9:00 PM

WHAT: Dangerously hot conditions with temperatures up to 88
possible in Downtown Los Angeles and 85 in Inglewood. Hottest
Wednesday and Thursday.

WHERE: Los Angeles County Inland Coast including Downtown Los
Angeles.

WHEN: From Tuesday morning through Thursday evening.

IMPACTS: There is a high risk for dangerous heat illness for
anyone, especially for the very young, the very old, those without
air conditioning, and those active outdoors.

+ 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: Jun 21, 10:29 AM Source: NWS Alert

Moderate Expected Likely

Heat Advisory

Heat Advisory issued June 24 at 2:04AM PDT until June 25 at 9:00PM PDT by NWS Los Angeles/Oxnard CA

Jun 24, 2:04 AM → Jun 25, 9:00 PM

WHAT: Unseasonably hot conditions with temperatures in the mid to
upper 80s possible in Downtown Los Angeles and the low 80s in
Inglewood. Hottest Wednesday.

WHERE: Los Angeles County Inland Coast including Downtown Los
Angeles.

WHEN: Until 9 PM PDT Thursday.

IMPACTS: There is a high risk for heat illness for sensitive
populations including the very young, the very old, those without
air conditioning, and those active outdoors.

ADDITIONAL DETAILS: Higher humidity will have the potential to
add to the heat discomfort in the afternoons. Temperatures are
expected to cool slightly after Thursday.