Today | Weather | Thursday, October 30, 2025

Weather in San Jose, California

11:35 AM
Now
Cloudy Weather
64° F
Feels Like 66°
Precipitation 37 %
Wind 6 mph
UV Index (0 - 11+) 2
Humidity 71 %
Today
Cloudy Weather
Day 72°
Night 52°
Precipitation 40 %
Wind 7 mph
UV Index (0 - 11+) 3

San Jose Weather Forecast Updated

9 minutes ago
Last updated on

Weather Forecast History

Last Year's Weather on This Day (October 30, 2024)

Rainy Night

Day

70°

Night

54°

Wind

4 mph

Precipitation

96

Air Quality in San Jose

NOW
39 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 8.24 µg/m³
PM10 28.64 µg/m³
O3 0.042 ppm
NO2 0.5 ppb
SO2 0.3 ppb
CO 0.09 ppm
NH3 0 µg/m³
NO 0.17 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)
PM2.58.24 µg/m³
PM1028.64 µg/m³
O382.87 µg/m³
NO20.95 µg/m³
SO20.89 µg/m³
CO103.5 µg/m³
NH30 µg/m³
NO0.17 µg/m³