Today | Weather | Sunday, April 26, 2026

Weather in San Jose, California

12:21 PM
Now
Cloudy Weather
59° F
Feels Like 63°
Precipitation 30 %
Wind 8 mph
UV Index (0 - 11+) 4
Humidity 67 %
Today
Cloudy Weather
Day 64°
Night 48°
Precipitation 55 %
Wind 9 mph
UV Index (0 - 11+) 4

San Jose Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 26, 2025)
Stormy Weather

Day

61°

Night

52°

Wind

9 mph

UV Index

3

Precipitation

88 %

Air Quality in San Jose

NOW
81 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.13 µg/m³
PM10 7.28 µg/m³
O3 0.064 ppm
NO2 0.2 ppb
SO2 0.3 ppb
CO 0.12 ppm
NH3 0.02 µg/m³
NO 0.05 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.53.13 µg/m³
PM107.28 µg/m³
O3125.55 µg/m³
NO20.36 µg/m³
SO20.69 µg/m³
CO136.9 µg/m³
NH30.02 µg/m³
NO0.05 µg/m³