Today | Weather | Thursday, October 29, 2026

Weather in Fontana, California

04:51 PM
Now
Cloudy Weather
72° F
Feels Like 72°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 1
Humidity 54 %
Today
Cloudy Weather
Day 73°
Night 59°
Precipitation 25 %
Wind 5 mph
UV Index (0 - 11+) 4

Fontana Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 29, 2025)
Night

Day

91°

Night

61°

Wind

6 mph

Precipitation

0 %

Air Quality in Fontana

NOW
48 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.46 µg/m³
PM10 8.33 µg/m³
O3 0.051 ppm
NO2 0.1 ppb
SO2 0.1 ppb
CO 0.11 ppm
NH3 0 µg/m³
NO 0 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)
PM2.5 – 2.46 µg/m³
PM10 – 8.33 µg/m³
O3 – 100.84 µg/m³
NO2 – 0.27 µg/m³
SO2 – 0.31 µg/m³
CO – 120.64 µg/m³
NH3 – 0 µg/m³
NO – 0 µg/m³