Today | Weather | Thursday, August 20, 2026

Weather in McAllen, Texas

11:35 PM
Today
Cloudy Night
Day 104°
Night 81°
Precipitation 4 %
Wind 12 mph

McAllen Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (August 20, 2025)
Cloudy Night

Day

102°

Night

77°

Wind

6 mph

Precipitation

25 %

Air Quality in McAllen

NOW
23 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.37 µg/m³
PM10 5.22 µg/m³
O3 0.024 ppm
NO2 0.5 ppb
SO2 0.3 ppb
CO 0.10 ppm
NH3 0.5 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 considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.54.37 µg/m³
PM105.22 µg/m³
O347.93 µg/m³
NO20.9 µg/m³
SO20.75 µg/m³
CO115.68 µg/m³
NH30.5 µg/m³
NO0 µg/m³