Hourly Weather | Today › Thursday, October 1, 2026
Active Weather Warnings
McKinney, Texas
2 AM
Cloudy Weather
73°
Feels Like 77°
49
Humidity: 90%
UV Index: 0
Wind: 6 mph
3 AM
Rainy Weather
73°
Feels Like 72°
68
Humidity: 90%
UV Index: 0
Wind: 6 mph
4 AM
Rainy Weather
73°
Feels Like 73°
59
Humidity: 91%
UV Index: 0
Wind: 6 mph
5 AM
Cloudy Weather
72°
Feels Like 75°
49
Humidity: 92%
UV Index: 0
Wind: 6 mph
6 AM
Rainy Weather
72°
Feels Like 70°
69
Humidity: 94%
UV Index: 0
Wind: 7 mph
7 AM
Rainy Weather
72°
Feels Like 70°
69
Humidity: 92%
UV Index: 0
Wind: 7 mph
8 AM
Cloudy Weather
72°
Feels Like 75°
49
Humidity: 90%
UV Index: 0
Wind: 6 mph
9 AM
Rainy Weather
73°
Feels Like 72°
63
Humidity: 89%
UV Index: 0
Wind: 7 mph
10 AM
Rainy Weather
73°
Feels Like 72°
63
Humidity: 88%
UV Index: 1
Wind: 7 mph
11 AM
Cloudy Weather
73°
Feels Like 79°
40
Humidity: 86%
UV Index: 1
Wind: 8 mph
12 PM
Cloudy Weather
75°
Feels Like 79°
34
Humidity: 84%
UV Index: 1
Wind: 8 mph
1 PM
Cloudy Weather
75°
Feels Like 81°
39
Humidity: 81%
UV Index: 1
Wind: 8 mph
2 PM
Cloudy Weather
79°
Feels Like 82°
49
Humidity: 74%
UV Index: 1
Wind: 8 mph
3 PM
Cloudy Weather
75°
Feels Like 81°
49
Humidity: 87%
UV Index: 1
Wind: 8 mph
4 PM
Rainy Weather
77°
Feels Like 79°
56
Humidity: 86%
UV Index: 1
Wind: 8 mph
5 PM
Cloudy Weather
75°
Feels Like 81°
49
Humidity: 84%
UV Index: 0
Wind: 9 mph
6 PM
Cloudy Weather
75°
Feels Like 77°
49
Humidity: 79%
UV Index: 0
Wind: 8 mph
7 PM
Rainy Weather
75°
Feels Like 72°
56
Humidity: 77%
UV Index: 0
Wind: 8 mph
8 PM
Cloudy Weather
73°
Feels Like 73°
25
Humidity: 81%
UV Index: 0
Wind: 8 mph
9 PM
Cloudy Weather
73°
Feels Like 73°
20
Humidity: 82%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Weather
72°
Feels Like 72°
20
Humidity: 83%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Weather
72°
Feels Like 72°
20
Humidity: 84%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

2 AM
19 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.19 µg/m³
  • PM10: 2.14 µg/m³
  • O3: 0.021 ppm
  • NO2: 1.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

3 AM
19 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.25 µg/m³
  • PM10: 2.31 µg/m³
  • O3: 0.020 ppm
  • NO2: 1 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

4 AM
18 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.27 µg/m³
  • PM10: 2.36 µg/m³
  • O3: 0.020 ppm
  • NO2: 1 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

5 AM
18 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.23 µg/m³
  • PM10: 2.27 µg/m³
  • O3: 0.019 ppm
  • NO2: 0.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

6 AM
17 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.19 µg/m³
  • PM10: 2.19 µg/m³
  • O3: 0.019 ppm
  • NO2: 0.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

7 AM
17 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.15 µg/m³
  • PM10: 2.13 µg/m³
  • O3: 0.018 ppm
  • NO2: 1 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

8 AM
16 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.12 µg/m³
  • PM10: 1.98 µg/m³
  • O3: 0.017 ppm
  • NO2: 1.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.11 µg/m³
  • PM10: 1.78 µg/m³
  • O3: 0.016 ppm
  • NO2: 1.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.08 µg/m³
  • PM10: 1.61 µg/m³
  • O3: 0.015 ppm
  • NO2: 1.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.97 µg/m³
  • PM10: 1.38 µg/m³
  • O3: 0.014 ppm
  • NO2: 1.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.85 µg/m³
  • PM10: 1.15 µg/m³
  • O3: 0.014 ppm
  • NO2: 1.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.77 µg/m³
  • PM10: 1.01 µg/m³
  • O3: 0.013 ppm
  • NO2: 1.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.71 µg/m³
  • PM10: 0.93 µg/m³
  • O3: 0.013 ppm
  • NO2: 1.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.69 µg/m³
  • PM10: 0.9 µg/m³
  • O3: 0.013 ppm
  • NO2: 1.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.68 µg/m³
  • PM10: 0.88 µg/m³
  • O3: 0.013 ppm
  • NO2: 1.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.7 µg/m³
  • PM10: 0.9 µg/m³
  • O3: 0.013 ppm
  • NO2: 1.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.73 µg/m³
  • PM10: 0.95 µg/m³
  • O3: 0.012 ppm
  • NO2: 2 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.77 µg/m³
  • PM10: 1 µg/m³
  • O3: 0.011 ppm
  • NO2: 2.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.79 µg/m³
  • PM10: 1.04 µg/m³
  • O3: 0.011 ppm
  • NO2: 2.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.8 µg/m³
  • PM10: 1.04 µg/m³
  • O3: 0.011 ppm
  • NO2: 2.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.81 µg/m³
  • PM10: 1.04 µg/m³
  • O3: 0.011 ppm
  • NO2: 2.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.82 µg/m³
  • PM10: 1.02 µg/m³
  • O3: 0.011 ppm
  • NO2: 2.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

Weather Alerts and Warnings for McKinney

Severe Future Possible

Flood Watch

Flood Watch issued September 30 at 2:26PM CDT until October 2 at 7:00AM CDT by NWS Fort Worth TX
Sep 30, 4:00 PM → Oct 2, 7:00 AM
WHAT: Flooding caused by excessive rainfall continues to be
possible.

WHERE: Portions of north central and south central Texas,
including the following counties, in north central Texas, Bell,
Bosque, Collin, Comanche, Cooke, Coryell, Dallas, Denton, Eastland,
Ellis, Erath, Falls, Fannin, Grayson, Hamilton, Hill, Hood, Hunt,
Jack, Johnson, Kaufman, Lampasas, Limestone, McLennan, Mills,
Montague, Navarro, Palo Pinto, Parker, Rockwall, Somervell,
Stephens, Tarrant, Wise and Young. In south central Texas, Milam.

WHEN: Through Friday morning.

IMPACTS: Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Low-water crossings may be flooded.

ADDITIONAL DETAILS:
- Slow moving showers and storms will likely bring widespread 2 to
3 inches of rain across the watch area. Localized areas up to 5
inches will be possible.
- weather.gov/safety/flood
+ Read More
You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
Updated: Sep 30, 11:49 PM Source: NWS Alert