Today | Weather | Sunday, October 25, 2026

Weather in Rialto, California

02:42 PM
Now
Cloudy Weather
79° F
Feels Like 81°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 3
Humidity 28 %
Today
Sunny Weather
Day 79°
Night 55°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 4

Rialto Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 25, 2025)
Cloudy Night

Day

75°

Night

54°

Wind

4 mph

Precipitation

0 %

Air Quality in Rialto

NOW
83 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 16.65 µg/m³
PM10 23.9 µg/m³
O3 0.065 ppm
NO2 0.5 ppb
SO2 0.7 ppb
CO 0.16 ppm
NH3 0.06 µg/m³
NO 0.1 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)
PM2.5 – 16.65 µg/m³
PM10 – 23.9 µg/m³
O3 – 126.72 µg/m³
NO2 – 0.88 µg/m³
SO2 – 1.96 µg/m³
CO – 182.46 µg/m³
NH3 – 0.06 µg/m³
NO – 0.1 µg/m³