Today | Weather | Tuesday, February 24, 2026

Weather in Rancho Cucamonga, California

06:31 PM
Now
Cloudy Night
66° F
Feels Like 64°
Precipitation 0 %
Wind 6 mph
Humidity 53 %
Today
Cloudy Weather
Day 81°
Night 54°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 5

Rancho Cucamonga Weather Forecast Updated

33 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (February 24, 2025)
Sunny Weather

Day

79°

Night

54°

Wind

4 mph

UV Index

5

Precipitation

0 %

Air Quality in Rancho Cucamonga

NOW
47 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 9.89 µg/m³
PM10 16.66 µg/m³
O3 0.051 ppm
NO2 2.3 ppb
SO2 0.4 ppb
CO 0.15 ppm
NH3 0.19 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 considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.59.89 µg/m³
PM1016.66 µg/m³
O3100.69 µg/m³
NO24.28 µg/m³
SO21.14 µg/m³
CO173.46 µg/m³
NH30.19 µg/m³
NO0 µg/m³