Today | Weather | Thursday, February 26, 2026

Weather in McKinney, Texas

01:05 AM
Now
Cloudy Night
55° F
Feels Like 55°
Precipitation 0 %
Wind 4 mph
Humidity 81 %
Today
Sunny Weather
Day 79°
Night 46°
Precipitation 1 %
Wind 15 mph
UV Index (0 - 11+) 5

McKinney Weather Forecast Updated

19 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (February 26, 2025)
Partly Sunny with Showers

Day

77°

Night

45°

Wind

12 mph

UV Index

5

Precipitation

40 %

Air Quality in McKinney

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

Pollutant Concentrations:

PM2.5 11.11 µg/m³
PM10 16.57 µg/m³
O3 0.032 ppm
NO2 5 ppb
SO2 0.4 ppb
CO 0.19 ppm
NH3 2.74 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)
PM2.511.11 µg/m³
PM1016.57 µg/m³
O363.06 µg/m³
NO29.34 µg/m³
SO20.95 µg/m³
CO215.61 µg/m³
NH32.74 µg/m³
NO0 µg/m³