Today | Weather | Tuesday, April 21, 2026

Weather in Pomona, California

03:09 PM
Now
Rainy Weather
66° F
Feels Like 66°
Precipitation 55 %
Wind 12 mph
UV Index (0 - 11+) 4
Humidity 55 %
Today
Partly Sunny with Showers
Day 66°
Night 52°
Precipitation 80 %
Wind 8 mph
UV Index (0 - 11+) 4

Pomona Weather Forecast Updated

48 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 21, 2025)
Sunny Weather

Day

75°

Night

52°

Wind

7 mph

UV Index

10

Precipitation

1 %

Air Quality in Pomona

NOW
45 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.2 µg/m³
PM10 5.68 µg/m³
O3 0.049 ppm
NO2 0.1 ppb
SO2 0.1 ppb
CO 0.11 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)
PM2.52.2 µg/m³
PM105.68 µg/m³
O395.68 µg/m³
NO20.12 µg/m³
SO20.28 µg/m³
CO123.25 µg/m³
NH30 µg/m³
NO0.01 µg/m³