Today | Weather | Thursday, October 30, 2025

Weather in San Jose, California

11:35 AM

Now

64° F

Feels Like 66°

Precipitation 37 %

Wind 6 mph

UV Index (0 - 11+) 2

Humidity 71 %

Today

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 October 30, 2025 11:26 AM

Weather Forecast History

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

Day

70°

Night

54°

Wind

4 mph

Precipitation

Air Quality in San Jose

NOW

39 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 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

PM_2.5 – 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)

PM_2.5 – 8.24 µg/m³

PM₁₀ – 28.64 µg/m³

O₃ – 82.87 µg/m³

NO₂ – 0.95 µg/m³

SO₂ – 0.89 µg/m³

CO – 103.5 µg/m³

NH₃ – 0 µg/m³

NO – 0.17 µg/m³

View Hourly Air Quality Forecast