Today | Weather | Sunday, April 26, 2026

Weather in Rialto, California

08:23 AM
Now
Rainy Weather
54° F
Feels Like 48°
Precipitation 51 %
Wind 8 mph
UV Index (0 - 11+) 1
Humidity 80 %
Today
Cloudy Weather
Day 64°
Night 50°
Precipitation 55 %
Wind 10 mph
UV Index (0 - 11+) 5

Rialto Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 26, 2025)
Stormy Weather

Day

57°

Night

48°

Wind

8 mph

UV Index

3

Precipitation

97 %

Air Quality in Rialto

NOW
50 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.5 µg/m³
PM10 0.8 µg/m³
O3 0.054 ppm
NO2 0.2 ppb
SO2 0.1 ppb
CO 0.11 ppm
NH3 0.01 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)
PM2.50.5 µg/m³
PM100.8 µg/m³
O3106.09 µg/m³
NO20.4 µg/m³
SO20.3 µg/m³
CO128.72 µg/m³
NH30.01 µg/m³
NO0.02 µg/m³