Today | Weather | Thursday, September 10, 2026

Weather in McKinney, Texas

06:45 AM
Now
Night
77° F
Feels Like 82°
Precipitation 0 %
Wind 6 mph
Humidity 85 %
Today
Sunny with a Chance of Thunderstorms
Day 99°
Night 75°
Precipitation 55 %
Wind 8 mph
UV Index (0 - 11+) 8

Warning: High UV Index Today: 8

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

McKinney Weather Forecast Updated

5 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 10, 2025)
Cloudy Night

Day

90°

Night

64°

Wind

5 mph

Precipitation

49 %

Air Quality in McKinney

NOW
20 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.48 µg/m³
PM10 3.19 µg/m³
O3 0.021 ppm
NO2 1.5 ppb
SO2 0.4 ppb
CO 0.10 ppm
NH3 0.51 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)
PM2.52.48 µg/m³
PM103.19 µg/m³
O341.81 µg/m³
NO22.85 µg/m³
SO21 µg/m³
CO118.52 µg/m³
NH30.51 µg/m³
NO0 µg/m³