Hourly Weather Forecast for Murrieta, California

Hourly Weather | Today › Friday, August 28, 2026

Active Weather Warnings

Extreme Heat Warning

Murrieta, California

11 PM

79°

Feels Like 79°

Humidity: 66%

UV Index: 0

Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

11 PM

91 AQI

Moderate air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 31.16 µg/m³
PM₁₀: 44.75 µg/m³
O₃: 0.047 ppm
NO₂: 0.6 ppb
SO₂: 0.3 ppb
CO: 0.13 ppm

Health Recommendations:

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

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Murrieta

Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued August 28 at 9:06PM PDT until August 29 at 8:00PM PDT by NWS San Diego CA

Aug 28, 9:06 PM → Aug 29, 8:00 PM

WHAT: Hot conditions continue into Saturday with high temperatures
up to 103 degrees. Lows will be in the mid to upper 70s.

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, 10:30 PM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

Pollutant Concentrations:

Health Recommendations:

Weather Alerts and Warnings for Murrieta

Extreme Heat Warning

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