Today | Weather | Tuesday, April 7, 2026

Weather in Simi Valley, California

06:45 AM
Now
Cloudy Weather
54° F
Feels Like 55°
Precipitation 0 %
Wind 4 mph
UV Index (0 - 11+) 0
Humidity 82 %
Today
Cloudy Weather
Day 79°
Night 52°
Precipitation 1 %
Wind 7 mph
UV Index (0 - 11+) 7

Simi Valley Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 7, 2025)
Cloudy Weather

Day

79°

Night

50°

Wind

7 mph

UV Index

8

Precipitation

1 %

Air Quality in Simi Valley

NOW
47 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 6.03 µg/m³
PM10 18.4 µg/m³
O3 0.051 ppm
NO2 0.5 ppb
SO2 0.5 ppb
CO 0.11 ppm
NH3 0.05 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)
PM2.56.03 µg/m³
PM1018.4 µg/m³
O399.56 µg/m³
NO20.86 µg/m³
SO21.32 µg/m³
CO127.75 µg/m³
NH30.05 µg/m³
NO0 µg/m³