Today | Weather | Friday, September 18, 2026

Weather in Murrieta, California

02:39 AM
Now
Cloudy Night
61° F
Feels Like 61°
Precipitation 0 %
Wind 4 mph
Humidity 91 %
Today
Cloudy Weather
Day 86°
Night 54°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 6

Murrieta Weather Forecast Updated

39 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 18, 2025)
Stormy Weather

Day

82°

Night

64°

Wind

5 mph

Precipitation

55 %

Air Quality in Murrieta

NOW
46 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.97 µg/m³
PM10 8.88 µg/m³
O3 0.050 ppm
NO2 0.1 ppb
SO2 0.2 ppb
CO 0.12 ppm
NH3 0 µg/m³
NO 0 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 considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.52.97 µg/m³
PM108.88 µg/m³
O397.72 µg/m³
NO20.24 µg/m³
SO20.4 µg/m³
CO133.63 µg/m³
NH30 µg/m³
NO0 µg/m³