Today | Weather | Saturday, September 19, 2026

Weather in Pomona, California

01:46 AM
Now
Cloudy Night
61° F
Feels Like 63°
Precipitation 0 %
Wind 4 mph
Humidity 94 %
Today
Sunny Weather
Day 90°
Night 63°
Precipitation 1 %
Wind 6 mph
UV Index (0 - 11+) 7

Pomona Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 19, 2025)
Cloudy Night

Day

88°

Night

64°

Wind

5 mph

Precipitation

4 %

Air Quality in Pomona

NOW
44 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 8.25 µg/m³
PM10 24 µg/m³
O3 0.047 ppm
NO2 0.3 ppb
SO2 0.3 ppb
CO 0.13 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:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.58.25 µg/m³
PM1024 µg/m³
O392.33 µg/m³
NO20.52 µg/m³
SO20.83 µg/m³
CO153.27 µg/m³
NH30 µg/m³
NO0 µg/m³