Today | Weather | Thursday, February 5, 2026

Weather in Fontana, California

05:33 PM
Now
Rainy Weather
72° F
Feels Like 66°
Precipitation 40 %
Wind 20 mph
Humidity 26 %
Today
Partly Sunny with Showers
Day 81°
Night 50°
Precipitation 40 %
Wind 6 mph
UV Index (0 - 11+) 4

Fontana Weather Forecast Updated

2 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (February 5, 2025)
Rainy Weather

Day

66°

Night

54°

Wind

6 mph

UV Index

1

Precipitation

59 %

Air Quality in Fontana

NOW
157 AQI
Unhealthy air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 67.88 µg/m³
PM10 91.46 µg/m³
O3 0.061 ppm
NO2 0.4 ppb
SO2 0.2 ppb
CO 0.32 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:

Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.

Show raw pollutant concentrations (µg/m³)
PM2.567.88 µg/m³
PM1091.46 µg/m³
O3120 µg/m³
NO20.84 µg/m³
SO20.43 µg/m³
CO364.92 µg/m³
NH30 µg/m³
NO0 µg/m³