Today | Weather | Tuesday, April 7, 2026

Weather in San Leandro, California

11:47 AM
Now
Cloudy Weather
61° F
Feels Like 66°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 7
Humidity 60 %
Today
Cloudy Weather
Day 66°
Night 52°
Precipitation 0 %
Wind 12 mph
UV Index (0 - 11+) 7

San Leandro Weather Forecast Updated

42 minutes ago
Last updated on

Air Quality in San Leandro

NOW
55 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.99 µg/m³
PM10 9.65 µg/m³
O3 0.056 ppm
NO2 0.3 ppb
SO2 0.4 ppb
CO 0.11 ppm
NH3 0.01 µg/m³
NO 0.11 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)
PM2.53.99 µg/m³
PM109.65 µg/m³
O3109.43 µg/m³
NO20.55 µg/m³
SO21.06 µg/m³
CO130.55 µg/m³
NH30.01 µg/m³
NO0.11 µg/m³