National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Mostly Cloudy

80°F

27°C

Humidity 60%
Wind Speed Calm
Barometer 30.01 in (1016.1 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 20 May 5:53 pm CDT
Extended Forecast for

McKinney TX

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 67. Calm wind becoming east around 5 mph after midnight.

    Low: 67 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly after 4pm. Cloudy, with a high near 75. East northeast wind 5 to 10 mph becoming southeast in the afternoon. Chance of precipitation is 60%. New rainfall amounts between three quarters and one inch possible.

    High: 75 °F

    T-storms
    Likely

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely, mainly before 7pm. Mostly cloudy, with a low around 65. Northeast wind 5 to 10 mph becoming light and variable after midnight. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 65 °F

    T-storms
    Likely then
    Chance
    T-storms

  • Friday

    Friday: A slight chance of thunderstorms before 7am. Partly sunny, with a high near 82. South wind around 5 mph. Chance of precipitation is 10%.

    High: 82 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66. South southeast wind 5 to 10 mph.

    Low: 66 °F

    Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 81. Calm wind becoming south southeast around 5 mph in the afternoon. Chance of precipitation is 60%.

    High: 81 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. South southeast wind 5 to 10 mph becoming light southeast in the evening. Chance of precipitation is 70%.

    Low: 65 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 80. East wind around 5 mph. Chance of precipitation is 60%.

    High: 80 °F

    Chance
    T-storms then
    Showers
    Likely

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Northeast wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 67. Calm wind becoming east around 5 mph after midnight.
Thursday
Showers and thunderstorms likely, mainly after 4pm. Cloudy, with a high near 75. East northeast wind 5 to 10 mph becoming southeast in the afternoon. Chance of precipitation is 60%. New rainfall amounts between three quarters and one inch possible.
Thursday Night
Showers and thunderstorms likely, mainly before 7pm. Mostly cloudy, with a low around 65. Northeast wind 5 to 10 mph becoming light and variable after midnight. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Friday
A slight chance of thunderstorms before 7am. Partly sunny, with a high near 82. South wind around 5 mph. Chance of precipitation is 10%.
Friday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66. South southeast wind 5 to 10 mph.
Saturday
Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 81. Calm wind becoming south southeast around 5 mph in the afternoon. Chance of precipitation is 60%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. South southeast wind 5 to 10 mph becoming light southeast in the evening. Chance of precipitation is 70%.
Sunday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 80. East wind around 5 mph. Chance of precipitation is 60%.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Northeast wind around 5 mph becoming calm in the evening.
Memorial Day
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Wednesday
Showers and thunderstorms likely. Partly sunny, with a high near 82. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
McKinney TX
 33.19°N 96.59°W (Elev. 554 ft)
Last Update:
6:06 pm CDT May 20, 2026
Forecast Valid:
6pm CDT May 20, 2026-6pm CDT May 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation