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Hazardous Weather Conditions

Current conditions at

Dallas / Addison Airport (KADS)

Lat: 32.97°NLon: 96.83°WElev: 643ft.

Fair

81°F

27°C

Humidity 84%
Wind Speed S 13 G 22 mph
Barometer 29.63 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 18 Jun 1:15 am CDT
Extended Forecast for

Lewisville TX

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

  • Overnight

    Overnight: Mostly clear, with a low around 78. South southeast wind around 10 mph.

    Low: 78 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 99. Heat index values as high as 110. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms, mainly after 4am. Increasing clouds, with a low around 79. Southeast wind 5 to 10 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 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 93. Heat index values as high as 105. East southeast wind 5 to 10 mph.

    High: 93 °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 5 to 10 mph. Chance of precipitation is 60%.

    Low: 77 °F

    Chance
    Showers then
    Showers
    Likely

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 94. South wind around 10 mph, with gusts as high as 20 mph.

    High: 94 °F

    Chance
    T-storms

  • Saturday Night

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

    Low: 78 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 98. South wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 98 °F

    Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 80. South wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 80 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 78. South southeast wind around 10 mph.
Thursday
Mostly sunny and hot, with a high near 99. Heat index values as high as 110. 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. Increasing clouds, with a low around 79. Southeast wind 5 to 10 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Juneteenth
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 93. Heat index values as high as 105. East southeast wind 5 to 10 mph.
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 5 to 10 mph. Chance of precipitation is 60%.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 94. South wind around 10 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 78. South wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 98. South wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 80. South wind 15 to 20 mph, with gusts as high as 30 mph.
Monday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 97. Chance of precipitation is 20%.
Monday Night
A 30 percent chance of showers. Partly cloudy, with a low around 78.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 78.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 97.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewisville TX
 33.05°N 97°W (Elev. 531 ft)
Last Update:
7:06 pm CDT Jun 17, 2026
Forecast Valid:
1am CDT Jun 18, 2026-6pm CDT Jun 24, 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