Today | Weather | Thursday, May 21, 2026

Weather in Richardson, Texas

04:07 AM
Now
Cloudy Weather
70° F
Feels Like 72°
Precipitation 6 %
Wind 6 mph
Humidity 88 %
Today
Stormy Weather
Day 77°
Night 66°
Precipitation 99 %
Wind 7 mph
UV Index (0 - 11+) 3

Richardson Weather Forecast Updated

2 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 21, 2025)
Cloudy Weather

Day

93°

Night

68°

Wind

8 mph

UV Index

11

Precipitation

1 %

Air Quality in Richardson

NOW
14 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 3.24 µg/m³
PM10 3.49 µg/m³
O3 0.011 ppm
NO2 1.1 ppb
SO2 0.1 ppb
CO 0.10 ppm
NH3 1.11 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)
PM2.53.24 µg/m³
PM103.49 µg/m³
O321.34 µg/m³
NO22.1 µg/m³
SO20.19 µg/m³
CO117.95 µg/m³
NH31.11 µg/m³
NO0 µg/m³