Today | Weather | Saturday, September 19, 2026

Weather in Allen, Texas

12:24 AM
Now
Cloudy Night
82° F
Feels Like 81°
Precipitation 0 %
Wind 8 mph
Humidity 53 %
Today
Sunny Weather
Day 99°
Night 77°
Precipitation 2 %
Wind 9 mph
UV Index (0 - 11+) 7

Allen Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 19, 2025)
Cloudy Night

Day

90°

Night

72°

Wind

7 mph

Precipitation

2 %

Air Quality in Allen

NOW
42 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 7.7 µg/m³
PM10 9.66 µg/m³
O3 0.046 ppm
NO2 1.5 ppb
SO2 0.4 ppb
CO 0.12 ppm
NH3 0.88 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)
PM2.57.7 µg/m³
PM109.66 µg/m³
O389.88 µg/m³
NO22.77 µg/m³
SO20.96 µg/m³
CO141.22 µg/m³
NH30.88 µg/m³
NO0 µg/m³