Today | Weather | Friday, August 28, 2026

Active Weather Warnings

Extreme Heat Warning

Weather in Murrieta, California

10:20 PM

Now

79° F

Feels Like 81°

Precipitation 0 %

Wind 5 mph

Humidity 62 %

Today

Day 102°

Night 68°

Precipitation 0 %

Wind 4 mph

Murrieta Weather Forecast Updated

Last updated on August 28, 2026 at 8:56 PM

Weather Forecast History

Last Year's Weather on This Day (August 28, 2025)

Day

86°

Night

63°

Wind

4 mph

Precipitation

1 %

Air Quality in Murrieta

NOW

95 AQI

Moderate air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 33.04 µg/m³

PM₁₀ 46.61 µg/m³

O₃ 0.048 ppm

NO₂ 0.6 ppb

SO₂ 0.3 ppb

CO 0.14 ppm

NH₃ 0.02 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 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)

PM_2.5 – 33.04 µg/m³

PM₁₀ – 46.61 µg/m³

O₃ – 93.62 µg/m³

NO₂ – 1.14 µg/m³

SO₂ – 0.7 µg/m³

CO – 156.04 µg/m³

NH₃ – 0.02 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Murrieta

Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued August 28 at 11:46AM PDT until August 29 at 8:00PM PDT by NWS San Diego CA

Aug 28, 11:46 AM → Aug 29, 8:00 PM

WHAT: Dangerously hot conditions today with temperatures of 103 to
107 degrees. Hot conditions continue into Saturday with high
temperatures up to 103 degrees. Lows will be in the mid 70s to low
80s.

WHERE: San Bernardino and Riverside County Valleys-The Inland
Empire.

WHEN: Until 8 PM PDT Saturday.

IMPACTS: Heat related illnesses increase significantly during
extreme heat events.

ADDITIONAL DETAILS: Temperatures will fall to below normal by
Sunday.

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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.

Updated: Aug 28, 8:56 PM Source: NWS Alert