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Hazardous Weather Conditions

Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Mostly Cloudy

86°F

30°C

Humidity 65%
Wind Speed S 16 mph
Barometer 29.59 in (1001.4 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 17 Jun 7:53 pm CDT
Extended Forecast for

Prosper TX

Heat Advisory June 18, 12:00pm until June 18, 09:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 77. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 97. Heat index values as high as 107. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 97 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms, mainly after 4am. Partly cloudy, with a low around 79. East southeast wind 5 to 15 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 79 °F

    Chance
    Showers then
    Chance
    T-storms

  • Juneteenth

    Juneteenth: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 91. Heat index values as high as 105. Northeast wind around 10 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 77. Southeast wind around 10 mph. Chance of precipitation is 60%.

    Low: 77 °F

    Chance
    Showers then
    Showers
    Likely

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 93. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 93 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 78. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 97. South wind around 20 mph, with gusts as high as 30 mph.

    High: 97 °F

    Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 79. South wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 79 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 77. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 97. Heat index values as high as 107. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
A 50 percent chance of showers and thunderstorms, mainly after 4am. Partly cloudy, with a low around 79. East southeast wind 5 to 15 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Juneteenth
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 91. Heat index values as high as 105. Northeast wind around 10 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 77. Southeast wind around 10 mph. Chance of precipitation is 60%.
Saturday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 93. South wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 78. South wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 97. South wind around 20 mph, with gusts as high as 30 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 79. South wind 15 to 20 mph, with gusts as high as 30 mph.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 95. Chance of precipitation is 30%.
Monday Night
A 40 percent chance of showers. Partly cloudy, with a low around 77.
Tuesday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 94.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77.
Wednesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 95.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosper TX
 33.23°N 96.81°W (Elev. 646 ft)
Last Update:
7:06 pm CDT Jun 17, 2026
Forecast Valid:
8pm CDT Jun 17, 2026-6pm CDT Jun 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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