Today | Weather | Wednesday, September 23, 2026

Weather in San Antonio, Texas

10:19 PM
Now
Rainy Weather
81° F
Feels Like 84°
Precipitation 75 %
Wind 8 mph
Humidity 76 %
Today
Cloudy Night
Day 99°
Night 75°
Precipitation 55 %
Wind 6 mph

San Antonio Weather Forecast Updated

59 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 23, 2025)
Cloudy Night

Day

99°

Night

75°

Wind

8 mph

Precipitation

12 %

Air Quality in San Antonio

NOW
43 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.68 µg/m³
PM10 3.63 µg/m³
O3 0.046 ppm
NO2 0.5 ppb
SO2 0.1 ppb
CO 0.12 ppm
NH3 0.23 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)
PM2.52.68 µg/m³
PM103.63 µg/m³
O391.14 µg/m³
NO20.94 µg/m³
SO20.37 µg/m³
CO136.88 µg/m³
NH30.23 µg/m³
NO0 µg/m³