Today | Weather | Wednesday, September 3, 2025

Weather in McKinney, Texas

12:51 AM
Now
NightNighttime, with dark skies and stars or a moon visible.
70° F
Feels Like 70°
Precipitation 0 %
Wind 4 mph
Humidity 83 %
Today
Sunny WeatherSunny weather, clear skies and sunny weather.
Day 88°
Night 66°
Precipitation 1 %
Wind 7 mph
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

McKinney Weather Forecast Updated

Last updated on

Weather Forecast History

Last Year's Weather on This Day (September 3, 2024)

Rainy WeatherRainy weather, precipitation in the form of water droplets falling from the sky.

Day

75°

Night

72°

Wind

7 mph

Precipitation

89

Air quality in McKinney

NOW
57 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 5.61 µg/m³
PM10 5.67 µg/m³
O₃ 29.29 ppb
NO₂ 4.41 ppb
SO₂ 0.30 ppb
CO 200.00 ppb
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.