Today | Weather | Saturday, November 1, 2025

Weather in Rancho Cucamonga, California

10:07 AM

Now

66° F

Feels Like 70°

Precipitation 0 %

Wind 5 mph

UV Index (0 - 11+) 2

Humidity 48 %

Today

Day 88°

Night 57°

Precipitation 0 %

Wind 6 mph

UV Index (0 - 11+) 4

Rancho Cucamonga Weather Forecast Updated

Last updated on November 01, 2025 8:37 AM

Weather Forecast History

Last Year's Weather on This Day (November 1, 2024)

Day

70°

Night

48°

Wind

4 mph

Precipitation

Air Quality in Rancho Cucamonga

NOW

70 AQI

Moderate air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 21.51 µg/m³

PM₁₀ 37.38 µg/m³

O₃ 0.051 ppm

NO₂ 0.4 ppb

SO₂ 0.3 ppb

CO 0.14 ppm

NH₃ 0 µg/m³

NO 0.07 µg/m³

PM_2.5 – 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)

PM_2.5 – 21.51 µg/m³

PM₁₀ – 37.38 µg/m³

O₃ – 100.14 µg/m³

NO₂ – 0.7 µg/m³

SO₂ – 0.86 µg/m³

CO – 160.16 µg/m³

NH₃ – 0 µg/m³

NO – 0.07 µg/m³

View Hourly Air Quality Forecast