Today | Weather | Tuesday, February 24, 2026

Weather in Rialto, California

01:47 PM
Now
Cloudy Weather
79° F
Feels Like 82°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 4
Humidity 25 %
Today
Cloudy Weather
Day 79°
Night 54°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 5

Rialto Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (February 24, 2025)
Sunny Weather

Day

79°

Night

52°

Wind

4 mph

UV Index

5

Precipitation

0 %

Air Quality in Rialto

NOW
79 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 25.78 µg/m³
PM10 35.42 µg/m³
O3 0.062 ppm
NO2 0.9 ppb
SO2 0.3 ppb
CO 0.21 ppm
NH3 0.16 µg/m³
NO 0.22 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.525.78 µg/m³
PM1035.42 µg/m³
O3121.17 µg/m³
NO21.6 µg/m³
SO20.82 µg/m³
CO235.12 µg/m³
NH30.16 µg/m³
NO0.22 µg/m³