Today | Weather | Thursday, May 21, 2026

Weather in Stockton, California

08:19 AM
Now
Cloudy Weather
64° F
Feels Like 68°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 2
Humidity 52 %
Today
Cloudy Weather
Day 97°
Night 55°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Stockton Weather Forecast Updated

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

Day

93°

Night

57°

Wind

8 mph

UV Index

11

Precipitation

0 %

Air Quality in Stockton

NOW
33 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 7.9 µg/m³
PM10 15.75 µg/m³
O3 0.032 ppm
NO2 5.8 ppb
SO2 0.7 ppb
CO 0.16 ppm
NH3 4.77 µg/m³
NO 1.5 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)
PM2.57.9 µg/m³
PM1015.75 µg/m³
O363.03 µg/m³
NO211 µg/m³
SO21.96 µg/m³
CO180.99 µg/m³
NH34.77 µg/m³
NO1.5 µg/m³