Today | Weather | Tuesday, September 15, 2026

Weather in Tracy, California

01:24 PM
Now
Cloudy Weather
84° F
Feels Like 90°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 6
Humidity 27 %
Today
Sunny Weather
Day 91°
Night 54°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 6

Tracy Weather Forecast Updated

49 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 15, 2025)
Night

Day

90°

Night

63°

Wind

5 mph

Precipitation

0 %

Air Quality in Tracy

NOW
41 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 5 µg/m³
PM10 17.28 µg/m³
O3 0.045 ppm
NO2 0.4 ppb
SO2 0.3 ppb
CO 0.16 ppm
NH3 0 µg/m³
NO 0.14 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)
PM2.55 µg/m³
PM1017.28 µg/m³
O387.57 µg/m³
NO20.72 µg/m³
SO20.78 µg/m³
CO183.44 µg/m³
NH30 µg/m³
NO0.14 µg/m³