Today | Weather | Tuesday, August 25, 2026

Weather in San Jose, California

05:26 AM
Now
Cloudy Weather
61° F
Feels Like 61°
Precipitation 0 %
Wind 5 mph
Humidity 88 %
Today
Cloudy Weather
Day 82°
Night 61°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 7

San Jose Weather Forecast Updated

59 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (August 25, 2025)
Cloudy Night

Day

81°

Night

61°

Wind

5 mph

Precipitation

1 %

Air Quality in San Jose

NOW
30 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.65 µg/m³
PM10 10.61 µg/m³
O3 0.032 ppm
NO2 0.6 ppb
SO2 0.3 ppb
CO 0.07 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)
PM2.53.65 µg/m³
PM1010.61 µg/m³
O363.01 µg/m³
NO21.1 µg/m³
SO20.68 µg/m³
CO85.41 µg/m³
NH30 µg/m³
NO0 µg/m³