Today | Weather | Monday, September 14, 2026

Weather in Rialto, California

08:17 AM
Now
Cloudy Weather
64° F
Feels Like 68°
Precipitation 0 %
Wind 2 mph
UV Index (0 - 11+) 1
Humidity 92 %
Today
Cloudy Weather
Day 91°
Night 64°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 7

Rialto Weather Forecast Updated

28 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 14, 2025)
Cloudy Weather

Day

88°

Night

64°

Wind

6 mph

UV Index

70

Precipitation

0 %

Air Quality in Rialto

NOW
39 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 5.57 µg/m³
PM10 20.79 µg/m³
O3 0.042 ppm
NO2 0.9 ppb
SO2 0.4 ppb
CO 0.17 ppm
NH3 0.18 µg/m³
NO 0.02 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)
PM2.55.57 µg/m³
PM1020.79 µg/m³
O381.8 µg/m³
NO21.6 µg/m³
SO21.12 µg/m³
CO198.04 µg/m³
NH30.18 µg/m³
NO0.02 µg/m³