Today | Weather | Friday, November 13, 2026

Weather in Rancho Cucamonga, California

03:46 PM
Now
Rainy Weather
61° F
Feels Like 57°
Precipitation 66 %
Wind 8 mph
UV Index (0 - 11+) 0
Humidity 77 %
Today
Partly Sunny with Showers
Day 64°
Night 54°
Precipitation 100 %
Wind 8 mph
UV Index (0 - 11+) 1

Rancho Cucamonga Weather Forecast Updated

16 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (November 13, 2025)
Rainy Weather

Day

79°

Night

59°

Wind

7 mph

Precipitation

96 %

Air Quality in Rancho Cucamonga

NOW
44 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.17 µg/m³
PM10 1.86 µg/m³
O3 0.047 ppm
NO2 0.1 ppb
SO2 0 ppb
CO 0.10 ppm
NH3 0 µg/m³
NO 0.01 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 – 1.17 µg/m³
PM10 – 1.86 µg/m³
O3 – 92.82 µg/m³
NO2 – 0.11 µg/m³
SO2 – 0.09 µg/m³
CO – 109.91 µg/m³
NH3 – 0 µg/m³
NO – 0.01 µg/m³