Hourly Weather | Today Tuesday, August 11, 2026
Active Weather Warnings
McKinney, Texas
10 AM
Sunny Weather
84°
Feels Like 93°
0
Humidity: 67%
UV Index: 5
Wind: 12 mph
11 AM
Sunny Weather
88°
Feels Like 99°
0
Humidity: 61%
UV Index: 7
Wind: 12 mph
12 PM
Cloudy Weather
91°
Feels Like 102°
0
Humidity: 55%
UV Index: 9
Wind: 10 mph
1 PM
Cloudy Weather
93°
Feels Like 106°
0
Humidity: 51%
UV Index: 11
Wind: 12 mph
2 PM
Cloudy Weather
95°
Feels Like 106°
0
Humidity: 48%
UV Index: 9
Wind: 13 mph
3 PM
Cloudy Weather
97°
Feels Like 104°
0
Humidity: 46%
UV Index: 7
Wind: 13 mph
4 PM
Cloudy Weather
97°
Feels Like 102°
0
Humidity: 43%
UV Index: 5
Wind: 14 mph
5 PM
Cloudy Weather
99°
Feels Like 102°
0
Humidity: 39%
UV Index: 3
Wind: 14 mph
6 PM
Cloudy Weather
97°
Feels Like 99°
0
Humidity: 41%
UV Index: 2
Wind: 15 mph
7 PM
Cloudy Weather
97°
Feels Like 95°
0
Humidity: 41%
UV Index: 1
Wind: 15 mph
8 PM
Cloudy Weather
93°
Feels Like 93°
0
Humidity: 43%
UV Index: 0
Wind: 14 mph
9 PM
Cloudy Night
91°
Feels Like 91°
0
Humidity: 46%
UV Index: 0
Wind: 14 mph
10 PM
Cloudy Night
90°
Feels Like 90°
0
Humidity: 49%
UV Index: 0
Wind: 13 mph
11 PM
Cloudy Night
88°
Feels Like 88°
0
Humidity: 52%
UV Index: 0
Wind: 14 mph

Hourly Air Quality Forecast - AQI (US EPA)

10 AM
15 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.65 µg/m³
  • PM10: 3.49 µg/m³
  • O3: 0.016 ppm
  • NO2: 0.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 AM
20 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.63 µg/m³
  • PM10: 3.22 µg/m³
  • O3: 0.022 ppm
  • NO2: 0.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

12 PM
24 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.64 µg/m³
  • PM10: 2.95 µg/m³
  • O3: 0.026 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

1 PM
26 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.77 µg/m³
  • PM10: 2.99 µg/m³
  • O3: 0.028 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

2 PM
27 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.74 µg/m³
  • PM10: 2.84 µg/m³
  • O3: 0.029 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

3 PM
28 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.61 µg/m³
  • PM10: 2.6 µg/m³
  • O3: 0.030 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

4 PM
28 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.52 µg/m³
  • PM10: 2.46 µg/m³
  • O3: 0.030 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 PM
29 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.46 µg/m³
  • PM10: 2.38 µg/m³
  • O3: 0.031 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 PM
29 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.42 µg/m³
  • PM10: 2.34 µg/m³
  • O3: 0.031 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 PM
29 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.31 µg/m³
  • PM10: 2.22 µg/m³
  • O3: 0.031 ppm
  • NO2: 0.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM
28 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.17 µg/m³
  • PM10: 2.04 µg/m³
  • O3: 0.030 ppm
  • NO2: 0.7 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM
27 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.04 µg/m³
  • PM10: 1.87 µg/m³
  • O3: 0.029 ppm
  • NO2: 0.9 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM
26 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.93 µg/m³
  • PM10: 1.73 µg/m³
  • O3: 0.028 ppm
  • NO2: 1 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM
25 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.82 µg/m³
  • PM10: 1.57 µg/m³
  • O3: 0.027 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Weather Alerts and Warnings for McKinney

Moderate Expected Likely

Heat Advisory

Heat Advisory issued August 11 at 5:09AM CDT until August 11 at 8:00PM CDT by NWS Fort Worth TX
Aug 11, 1:00 PM Aug 11, 8:00 PM
WHAT: Heat index values up to 106 expected.

WHERE: Most of North Texas.

WHEN: From 1 PM to 8 PM CDT Tuesday.

IMPACTS: Hot temperatures and high humidity will increase the
risk for heat-related illnesses to occur, particularly for
those working or participating in outdoor activities.
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Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Updated: Aug 11, 8:15 AM Source: NWS Alert