Today | Weather | Monday, September 21, 2026

Weather in Stockton, California

05:14 AM
Now
Cloudy Night
57° F
Feels Like 57°
Precipitation 0 %
Wind 5 mph
Humidity 90 %
Today
Cloudy Weather
Day 84°
Night 55°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 5

Stockton Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 21, 2025)
Night

Day

90°

Night

63°

Wind

6 mph

Precipitation

0 %

Air Quality in Stockton

NOW
37 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.71 µg/m³
PM10 11.32 µg/m³
O3 0.040 ppm
NO2 1.4 ppb
SO2 0.3 ppb
CO 0.13 ppm
NH3 0.12 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)
PM2.53.71 µg/m³
PM1011.32 µg/m³
O377.98 µg/m³
NO22.62 µg/m³
SO20.81 µg/m³
CO147.44 µg/m³
NH30.12 µg/m³
NO0 µg/m³