Today | Weather | Friday, September 19, 2025

Weather in San Antonio, Texas

02:54 AM
Now
Cloudy Night
75° F
Feels Like 77°
Precipitation 3 %
Wind 5 mph
Humidity 80 %
Today
Sunny Weather
Day 97°
Night 72°
Precipitation 8 %
Wind 11
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.

San Antonio Weather Forecast Updated

57 minutes ago
Last updated on

Weather Forecast History

Last Year's Weather on This Day (September 19, 2024)

Partly Sunny with Showers

Day

99°

Night

79°

Wind

6 mph

UV Index

8

Precipitation

55

Air quality in San Antonio

NOW
59 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 8.68 µg/m³
PM10 14.33 µg/m³
O₃ 41.33 ppb
NO₂ 7.76 ppb
SO₂ 0.50 ppb
CO 151.79 ppb
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.