Today | Weather | Wednesday, September 30, 2026

Active Weather Warnings

Special Weather Statement

Weather in McAllen, Texas

10:32 AM

Now

93° F

Feels Like 102°

Precipitation 6 %

Wind 17 mph

UV Index (0 - 11+) 4

Humidity 60 %

Today

Day 102°

Night 82°

Precipitation 25 %

Wind 16 mph

UV Index (0 - 11+) 7

McAllen Weather Forecast Updated

22 minutes ago

Last updated on September 30, 2026 at 10:09 AM

Weather Forecast History

Last Year's Weather on This Day (September 30, 2025)

Day

97°

Night

70°

Wind

5 mph

Precipitation

0 %

Air Quality in McAllen

NOW

21 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 3.18 µg/m³

PM₁₀ 3.7 µg/m³

O₃ 0.023 ppm

NO₂ 0.4 ppb

SO₂ 0.1 ppb

CO 0.12 ppm

NH₃ 0.18 µg/m³

NO 0.05 µg/m³

PM_2.5 – 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)

PM_2.5 – 3.18 µg/m³

PM₁₀ – 3.7 µg/m³

O₃ – 44.79 µg/m³

NO₂ – 0.68 µg/m³

SO₂ – 0.35 µg/m³

CO – 141.39 µg/m³

NH₃ – 0.18 µg/m³

NO – 0.05 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for McAllen

Moderate Expected Observed

Special Weather Statement

Special Weather Statement issued September 30 at 9:23AM CDT by NWS Brownsville TX

Sep 30, 9:23 AM → Sep 30, 6:00 PM

The combination of hot temperatures and elevated humidity levels
will produce Heat Index values between 108 and 110 degrees for
several hours this afternoon into early this evening. A few
locations may briefly experience Heat Index values above 110
degrees.

If you plan to spend time outside, 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 30, 10:09 AM Source: NWS Alert