Today | Weather | Tuesday, January 13, 2026

Weather in Fontana, California

12:28 PM
Now
Sunny Weather
73° F
Feels Like 72°
Precipitation 0 %
Wind 16 mph
UV Index (0 - 11+) 3
Humidity 19 %
Today
Sunny Weather
Day 79°
Night 52°
Precipitation 0 %
Wind 15 mph
UV Index (0 - 11+) 3

Fontana Weather Forecast Updated

Weather Forecast History
Last Year's Weather on This Day (January 13, 2025)
Windy Weather

Day

59°

Night

43°

Wind

20 mph

UV Index

3

Precipitation

0 %

Air Quality in Fontana

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

Pollutant Concentrations:

PM2.5 33.62 µg/m³
PM10 49.01 µg/m³
O3 0.037 ppm
NO2 18.7 ppb
SO2 1.9 ppb
CO 0.42 ppm
NH3 0.71 µg/m³
NO 9.67 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)
PM2.533.62 µg/m³
PM1049.01 µg/m³
O373.3 µg/m³
NO235.24 µg/m³
SO24.98 µg/m³
CO481.56 µg/m³
NH30.71 µg/m³
NO9.67 µg/m³