Today | Weather | Tuesday, November 11, 2025

Weather in Simi Valley, California

02:08 AM
Now
Cloudy Night
63° F
Feels Like 63°
Precipitation 0 %
Wind 6 mph
Humidity 36 %
Today
Cloudy Weather
Day 82°
Night 55°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 3

Simi Valley Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (November 11, 2024)
Cloudy Night

Day

70°

Night

46°

Wind

9 mph

Precipitation

25 %

Air Quality in Simi Valley

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

Pollutant Concentrations:

PM2.5 17.36 µg/m³
PM10 29.34 µg/m³
O3 0.050 ppm
NO2 0.8 ppb
SO2 0.3 ppb
CO 0.14 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 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)
PM2.517.36 µg/m³
PM1029.34 µg/m³
O397.97 µg/m³
NO21.47 µg/m³
SO20.74 µg/m³
CO156.79 µg/m³
NH30 µg/m³
NO0 µg/m³