Today | Weather | Tuesday, June 9, 2026

Weather in Simi Valley, California

04:45 PM
Now
Sunny Weather
81° F
Feels Like 82°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 3
Humidity 44 %
Today
Sunny Weather
Day 82°
Night 57°
Precipitation 1 %
Wind 8 mph
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Simi Valley Weather Forecast Updated

9 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (June 9, 2025)
Cloudy Weather

Day

79°

Night

54°

Wind

7 mph

UV Index

12

Precipitation

0 %

Air Quality in Simi Valley

NOW
34 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 5.73 µg/m³
PM10 14.84 µg/m³
O3 0.037 ppm
NO2 0.2 ppb
SO2 0.3 ppb
CO 0.08 ppm
NH3 0 µg/m³
NO 0.07 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)
PM2.55.73 µg/m³
PM1014.84 µg/m³
O372.06 µg/m³
NO20.31 µg/m³
SO20.86 µg/m³
CO91.81 µg/m³
NH30 µg/m³
NO0.07 µg/m³