Today | Weather | Thursday, February 5, 2026

Weather in Simi Valley, California

05:33 PM
Now
Cloudy Night
70° F
Feels Like 66°
Precipitation 37 %
Wind 12 mph
Humidity 31 %
Today
Partly Sunny with Showers
Day 79°
Night 55°
Precipitation 40 %
Wind 7 mph
UV Index (0 - 11+) 4

Simi Valley Weather Forecast Updated

16 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (February 5, 2025)
Rainy Weather

Day

61°

Night

52°

Wind

6 mph

UV Index

1

Precipitation

59 %

Air Quality in Simi Valley

NOW
148 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 54.7 µg/m³
PM10 70.02 µg/m³
O3 0.055 ppm
NO2 0.8 ppb
SO2 0.1 ppb
CO 0.28 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:

Members of sensitive groups may experience health effects. The general public is not likely to be affected.

Show raw pollutant concentrations (µg/m³)
PM2.554.7 µg/m³
PM1070.02 µg/m³
O3108.34 µg/m³
NO21.42 µg/m³
SO20.3 µg/m³
CO324.27 µg/m³
NH30 µg/m³
NO0 µg/m³