Today | Weather | Monday, January 19, 2026

Weather in San Antonio, Texas

08:06 PM
Now
Cloudy Night
55° F
Feels Like 52°
Precipitation 0 %
Wind 7 mph
Humidity 40 %
Today
Sunny Weather
Day 68°
Night 45°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 4

San Antonio Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (January 19, 2025)
Sunny Weather

Day

46°

Night

25°

Wind

14 mph

UV Index

4

Precipitation

1 %

Air Quality in San Antonio

NOW
55 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.06 µg/m³
PM10 5.43 µg/m³
O3 0.056 ppm
NO2 0.6 ppb
SO2 0.3 ppb
CO 0.11 ppm
NH3 0.25 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 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)
PM2.53.06 µg/m³
PM105.43 µg/m³
O3109.12 µg/m³
NO21.05 µg/m³
SO20.75 µg/m³
CO126.4 µg/m³
NH30.25 µg/m³
NO0 µg/m³