Today | Weather | Thursday, April 30, 2026

Weather in Fontana, California

10:25 PM
Now
Cloudy Night
61° F
Feels Like 59°
Precipitation 0 %
Wind 7 mph
Humidity 73 %
Today
Cloudy Night
Day 73°
Night 55°
Precipitation 0 %
Wind 6 mph

Fontana Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 30, 2025)
Cloudy Weather

Day

77°

Night

52°

Wind

7 mph

UV Index

9

Precipitation

40 %

Air Quality in Fontana

NOW
62 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 7.46 µg/m³
PM10 25.1 µg/m³
O3 0.058 ppm
NO2 0.2 ppb
SO2 0.4 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 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)
PM2.57.46 µg/m³
PM1025.1 µg/m³
O3113.74 µg/m³
NO20.43 µg/m³
SO21.16 µg/m³
CO126.39 µg/m³
NH30 µg/m³
NO0 µg/m³