Today | Weather | Sunday, August 9, 2026

Weather in McKinney, Texas

10:06 PM
Now
Cloudy Night
86° F
Feels Like 88°
Precipitation 18 %
Wind 10 mph
Humidity 59 %
Today
Stormy Weather
Day 99°
Night 77°
Precipitation 55 %
Wind 9 mph

McKinney Weather Forecast Updated

54 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (August 9, 2025)
Night

Day

99°

Night

75°

Wind

8 mph

Precipitation

4 %

Air Quality in McKinney

NOW
33 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.55 µg/m³
PM10 2 µg/m³
O3 0.035 ppm
NO2 0.8 ppb
SO2 0.2 ppb
CO 0.08 ppm
NH3 0.62 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)
PM2.51.55 µg/m³
PM102 µg/m³
O369.61 µg/m³
NO21.47 µg/m³
SO20.59 µg/m³
CO95.17 µg/m³
NH30.62 µg/m³
NO0 µg/m³