Today | Weather | Saturday, September 5, 2026
Active Weather Warnings

Weather in Brownsville, Texas

07:28 PM
Now
Cloudy Weather
90° F
Feels Like 97°
Precipitation 22 %
Wind 14 mph
UV Index (0 - 11+) 0
Humidity 61 %
Today
Cloudy Night
Day 99°
Night 79°
Precipitation 4 %
Wind 8 mph

Brownsville Weather Forecast Updated

17 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 5, 2025)
Cloudy Night

Day

99°

Night

79°

Wind

8 mph

Precipitation

4 %

Air Quality in Brownsville

NOW
20 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.51 µg/m³
PM10 5.7 µg/m³
O3 0.021 ppm
NO2 0.3 ppb
SO2 0.1 ppb
CO 0.10 ppm
NH3 0.22 µg/m³
NO 0.02 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)
PM2.53.51 µg/m³
PM105.7 µg/m³
O341.43 µg/m³
NO20.48 µg/m³
SO20.21 µg/m³
CO120.09 µg/m³
NH30.22 µg/m³
NO0.02 µg/m³

Weather Alerts and Warnings for Brownsville

Moderate Expected Observed

Special Weather Statement

Special Weather Statement issued September 5 at 7:46AM CDT by NWS Brownsville TX
Sep 5, 7:46 AM Sep 5, 7:15 PM
The combination of hot temperatures and elevated humidity levels
will produce heat index values between 108 and 111 degrees for
several hours this afternoon into this evening. A few locations
may briefly experience heat index values above 111 degrees.

If spending time outside today, drink plenty of water, wear light
weight and light colored clothing and take frequent breaks from
the heat. Young children and pets should never be left unattended
in vehicles.
Updated: Sep 5, 7:11 PM Source: NWS Alert