Today | Weather | Wednesday, February 25, 2026

Weather in San Leandro, California

08:19 PM
Now
Cloudy Night
59° F
Feels Like 57°
Precipitation 0 %
Wind 7 mph
Humidity 86 %
Today
Cloudy Night
Day 66°
Night 54°
Precipitation 7 %
Wind 6 mph

San Leandro Weather Forecast Updated

Last updated on

Air Quality in San Leandro

NOW
28 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 6.02 µg/m³
PM10 9.4 µg/m³
O3 0.031 ppm
NO2 1.6 ppb
SO2 0.3 ppb
CO 0.12 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)
PM2.56.02 µg/m³
PM109.4 µg/m³
O360.01 µg/m³
NO23.09 µg/m³
SO20.76 µg/m³
CO136.04 µg/m³
NH30 µg/m³
NO0 µg/m³