Today | Weather | Wednesday, October 21, 2026

Weather in Riverside, California

07:40 AM
Now
Cloudy Weather
64° F
Feels Like 64°
Precipitation 20 %
Wind 4 mph
UV Index (0 - 11+) 0
Humidity 78 %
Today
Stormy Weather
Day 82°
Night 59°
Precipitation 65 %
Wind 7 mph
UV Index (0 - 11+) 2

Riverside Weather Forecast Updated

2 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 21, 2025)
Rainy Night

Day

90°

Night

61°

Wind

5 mph

Precipitation

55 %

Air Quality in Riverside

NOW
36 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 7.36 µg/m³
PM10 22.44 µg/m³
O3 0.039 ppm
NO2 1.8 ppb
SO2 0.9 ppb
CO 0.14 ppm
NH3 0.03 µg/m³
NO 0.03 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 – 7.36 µg/m³
PM10 – 22.44 µg/m³
O3 – 77.01 µg/m³
NO2 – 3.42 µg/m³
SO2 – 2.39 µg/m³
CO – 158.93 µg/m³
NH3 – 0.03 µg/m³
NO – 0.03 µg/m³