Today | Weather | Tuesday, April 21, 2026

Weather in Allen, Texas

05:47 PM
Now
Cloudy Weather
59° F
Feels Like 55°
Precipitation 38 %
Wind 14 mph
UV Index (0 - 11+) 0
Humidity 85 %
Today
Rainy Weather
Day 61°
Night 57°
Precipitation 100 %
Wind 10 mph
UV Index (0 - 11+) 2

Allen Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 21, 2025)
Cloudy Weather

Day

82°

Night

57°

Wind

4 mph

UV Index

10

Precipitation

1 %

Air Quality in Allen

NOW
45 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.02 µg/m³
PM10 3.13 µg/m³
O3 0.049 ppm
NO2 1.1 ppb
SO2 0.1 ppb
CO 0.12 ppm
NH3 0.7 µg/m³
NO 0.06 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)
PM2.53.02 µg/m³
PM103.13 µg/m³
O396.05 µg/m³
NO22.02 µg/m³
SO20.24 µg/m³
CO134.94 µg/m³
NH30.7 µg/m³
NO0.06 µg/m³