Today | Weather | Friday, November 21, 2025

Weather in Pasadena, California

05:28 PM
Now
Cloudy Weather
59° F
Feels Like 57°
Precipitation 37 %
Wind 6 mph
Humidity 73 %
Today
Rainy Weather
Day 63°
Night 52°
Precipitation 100 %
Wind 9 mph
UV Index (0 - 11+) 3

Pasadena Weather Forecast Updated

31 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (November 21, 2024)
Night

Day

77°

Night

50°

Wind

4 mph

Precipitation

0 %

Air Quality in Pasadena

NOW
42 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.75 µg/m³
PM10 1.55 µg/m³
O3 0.046 ppm
NO2 0.5 ppb
SO2 0.1 ppb
CO 0.11 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)
PM2.50.75 µg/m³
PM101.55 µg/m³
O389.79 µg/m³
NO20.97 µg/m³
SO20.19 µg/m³
CO121.49 µg/m³
NH30 µg/m³
NO0 µg/m³