Today | Weather | Friday, October 9, 2026

Weather in Fontana, California

01:20 PM
Now
Sunny Weather
90° F
Feels Like 91°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 5
Humidity 27 %
Today
Sunny Weather
Day 93°
Night 66°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 5

Fontana Weather Forecast Updated

50 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 9, 2025)
Stormy Weather

Day

81°

Night

64°

Wind

4 mph

Precipitation

49 %

Air Quality in Fontana

NOW
58 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 14.77 µg/m³
PM10 30 µg/m³
O3 0.056 ppm
NO2 0.8 ppb
SO2 0.5 ppb
CO 0.12 ppm
NH3 0 µg/m³
NO 0.23 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 – 14.77 µg/m³
PM10 – 30 µg/m³
O3 – 110.92 µg/m³
NO2 – 1.42 µg/m³
SO2 – 1.32 µg/m³
CO – 141.22 µg/m³
NH3 – 0 µg/m³
NO – 0.23 µg/m³