Today | Weather | Thursday, September 18, 2025

Weather in Brownsville, Texas

05:16 AM
Now
Rainy Weather
75° F
Feels Like 82°
Precipitation 51 %
Wind 5 mph
Humidity 92 %
Today
Sunny with a Chance of Thunderstorms
Day 90°
Night 75°
Precipitation 90 %
Wind 14
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.

Brownsville Weather Forecast Updated

Last updated on

Weather Forecast History

Last Year's Weather on This Day (September 18, 2024)

Partly Sunny with Showers

Day

93°

Night

79°

Wind

8 mph

UV Index

9

Precipitation

90

Air quality in Brownsville

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

Pollutant Concentrations:

PM2.5 6.82 µg/m³
PM10 10.91 µg/m³
O₃ 33.49 ppb
NO₂ 3.52 ppb
SO₂ 0.25 ppb
CO 149.57 ppb
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide

Health Recommendations:

With this level of air quality, you have no limitations. Enjoy the outdoors